Maxim MAX240CMH, MAX240C-D, MAX239ENG, MAX239CWG, MAX239CNG Datasheet

General Description

The MAX220–MAX249 family of line drivers/receivers is
intended for all EIA/TIA-232E and V.28/V.24 communica­tions interfaces, particularly applications where ±12V is
not available.

These parts are especially useful in battery-powered sys­tems, since their low-power shutdown mode reduces
power dissipation to less than 5µW. The MAX225,
MAX233, MAX235, and MAX245/MAX246/MAX247 use
no external components and are recommended for appli­cations where printed circuit board space is critical.

________________________Applications

Portable Computers

Low-Power Modems

Interface Translation

Battery-Powered RS-232 Systems

Multidrop RS-232 Networks

____________________________Features

Superior to Bipolar

♦ Operate from Single +5V Power Supply

(+5V and +12V—MAX231/MAX239)

♦ Low-Power Receive Mode in Shutdown

(MAX223/MAX242)

♦ Meet All EIA/TIA-232E and V.28 Specifications
♦ Multiple Drivers and Receivers
♦ 3-State Driver and Receiver Outputs
♦ Open-Line Detection (MAX243)

Ordering Information

Ordering Information continued at end of data sheet.

*Contact factory for dice specifications.

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

________________________________________________________________ Maxim Integrated Products 1

Selection Table

19-4323; Rev 9; 4/00

PART

MAX220CPE

MAX220CSE
MAX220CWE 0°C to +70°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

16 Plastic DIP
16 Narrow SO

16 Wide SO
MAX220C/D 0°C to +70°C Dice*
MAX220EPE
MAX220ESE
MAX220EWE -40°C to +85°C

-40°C to +85°C

-40°C to +85°C 16 Plastic DIP
16 Narrow SO
16 Wide SO

MAX220EJE -40°C to +85°C 16 CERDIP
MAX220MJE -55°C to +125°C 16 CERDIP

Power No. of Nominal SHDN Rx
Part Supply RS-232 No. of Cap. Value & Three- Active in Data Rate
Number (V) Drivers/Rx Ext. Caps (µF) State SHDN (kbps) Features

MAX220 +5 2/2 4 4.7/10 No — 120 Ultra-low-power, industry-standard pinout
MAX222 +5 2/2 4 0.1 Yes — 200 Low-power shutdown
MAX223 (MAX213) +5 4/5 4 1.0 (0.1) Yes ✔ 120 MAX241 and receivers active in shutdown
MAX225 +5 5/5 0 — Yes ✔ 120 Available in SO
MAX230 (MAX200) +5 5/0 4 1.0 (0.1) Yes — 120 5 drivers with shutdown
MAX231 (MAX201) +5 and 2/2 2 1.0 (0.1) No — 120 Standard +5/+12V or battery supplies;

+7.5 to +13.2 same functions as MAX232
MAX232 (MAX202) +5 2/2 4 1.0 (0.1) No — 120 (64) Industry standard
MAX232A +5 2/2 4 0.1 No — 200 Higher slew rate, small caps
MAX233 (MAX203) +5 2/2 0 — No — 120 No external caps
MAX233A +5 2/2 0 — No — 200 No external caps, high slew rate
MAX234 (MAX204) +5 4/0 4 1.0 (0.1) No — 120 Replaces 1488
MAX235 (MAX205) +5 5/5 0 — Yes — 120 No external caps
MAX236 (MAX206) +5 4/3 4 1.0 (0.1) Yes — 120 Shutdown, three state
MAX237 (MAX207) +5 5/3 4 1.0 (0.1) No — 120 Complements IBM PC serial port
MAX238 (MAX208) +5 4/4 4 1.0 (0.1) No — 120 Replaces 1488 and 1489
MAX239 (MAX209) +5 and 3/5 2 1.0 (0.1) No — 120 Standard +5/+12V or battery supplies;

+7.5 to +13.2 single-package solution for IBM PC serial port
MAX240 +5 5/5 4 1.0 Yes — 120 DIP or flatpack package
MAX241 (MAX211) +5 4/5 4 1.0 (0.1) Yes — 120 Complete IBM PC serial port
MAX242 +5 2/2 4 0.1 Yes ✔ 200 Separate shutdown and enable
MAX243 +5 2/2 4 0.1 No — 200 Open-line detection simplifies cabling
MAX244 +5 8/10 4 1.0 No — 120 High slew rate
MAX245 +5 8/10 0 — Yes ✔ 120 High slew rate, int. caps, two shutdown modes
MAX246 +5 8/10 0 — Yes ✔ 120 High slew rate, int. caps, three shutdown modes
MAX247 +5 8/9 0 — Yes ✔ 120 High slew rate, int. caps, nine operating modes
MAX248 +5 8/8 4 1.0 Yes ✔ 120 High slew rate, selective half-chip enables
MAX249 +5 6/10 4 1.0 Yes ✔ 120 Available in quad flatpack package

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone].

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243

ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243

(VCC= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, TA= T

MIN

to T

MAX

‚ unless otherwise noted.)

Note 1: Input voltage measured with T

OUT

in high-impedance state, SHDN or VCC= 0V.

Note 2: For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Supply Voltage (VCC) ...............................................-0.3V to +6V

Input Voltages

T

IN

..............................................................-0.3V to (VCC- 0.3V)

R

IN

(Except MAX220) ........................................................±30V

R

IN

(MAX220).....................................................................±25V

T

OUT

(Except MAX220) (Note 1) .......................................±15V

T

OUT

(MAX220)...............................................................±13.2V

Output Voltages

T

OUT

...................................................................................±15V

R

OUT

.........................................................-0.3V to (VCC+ 0.3V)

Driver/Receiver Output Short Circuited to GND.........Continuous

Continuous Power Dissipation (T

A

= +70°C)

16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW

18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW

20-Pin Plastic DIP (derate 8.00mW/°C above +70°C) ..440mW
16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ...696mW

16-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW

18-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW

20-Pin Wide SO (derate 10.00mW/°C above +70°C)....800mW

20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW

16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW

18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW

Operating Temperature Ranges

MAX2_ _AC_ _, MAX2_ _C_ _.............................0°C to +70°C

MAX2_ _AE_ _, MAX2_ _E_ _ ..........................-40°C to +85°C

MAX2_ _AM_ _, MAX2_ _M_ _.......................-55°C to +125°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering, 10sec) .............................+300°C

V

1.4 0.8Input Logic Threshold Low

UNITSMIN TYP MAXPARAMETER CONDITIONS

Input Logic Threshold High

All except MAX220 2 1.4

V

All except MAX220, normal operation 540

Logic Pull-Up/lnput Current

SHDN = 0V, MAX222/242, shutdown, MAX220

±0.01 ±1

µA

VCC= 5.5V, SHDN = 0V, V

OUT

= ±15V, MAX222/242

±0.01 ±10

Output Leakage Current

VCC= SHDN = 0V, V

OUT

= ±15V

±0.01 ±10

µA

All except MAX220, normal operation 200 116Data Rate kb/s

Transmitter Output Resistance VCC= V+ = V- = 0V, V

OUT

= ±2V 300 10M Ω

Output Short-Circuit Current V

OUT

= 0V ±7 ±22 mA

RS-232 Input Voltage Operating Range ±30 V

All except MAX243 R2

IN

0.8 1.3

RS-232 Input Threshold Low VCC= 5V

MAX243 R2IN(Note 2) -3

V

All except MAX243 R2

IN

1.8 2.4

RS-232 Input Threshold High VCC= 5V

MAX243 R2IN(Note 2) -0.5 -0.1

V

All except MAX243, V

CC

= 5V, no hysteresis in shdn. 0.2 0.5 1

RS-232 Input Hysteresis

MAX243 1

V

RS-232 Input Resistance 357kΩ

TTL/CMOS Output Voltage Low I

OUT

= 3.2mA 0.2 0.4 V

TTL/CMOS Output Voltage High I

OUT

= -1.0mA 3.5 VCC- 0.2 V

Sourcing V

OUT

= GND -2 -10

mATTL/CMOS Output Short-Circuit Current

Shrinking V

OUT

= V

CC

10 30

V±5 ±8Output Voltage Swing All transmitter outputs loaded with 3kΩ to GND

RS-232 TRANSMITTERS

RS-232 RECEIVERS

2.4MAX220: VCC= 5.0V

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

_______________________________________________________________________________________ 3

Note 3: MAX243 R2

OUT

is guaranteed to be low when R2INis ≥ 0V or is floating.

ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)

(VCC= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, TA= T

MIN

to T

MAX

‚ unless otherwise noted.)

Operating Supply Voltage

SHDN Threshold High

4.5 5.5 V

MAX222/242

Transmitter-Output Enable Time
(SHDN goes high), Figure 4

2.0 1.4 V

MAX220 0.5 2

t

ET

No load

MAX222/232A/233A/242/243 410

MAX222/232A/233A/242/243 61230

MAX220 12

VCCSupply Current (SHDN = VCC),
Figures 5, 6, 11, 19

3kΩ load
both inputs

MAX222/232A/233A/242/243 15

mA

Transition Slew Rate

TA= +25°C 0.1 10

CL= 50pF to 2500pF,
R

L

= 3kΩ to 7kΩ,

V

CC

= 5V, TA= +25°C,
measured from +3V
to -3V or -3V to +3V

TA= 0°C to +70°C

CONDITIONS

250

MAX220 1.5 3 30

V/µs

TA= -40°C to +85°C 250

MAX222/242, 0.1µF caps

(includes charge-pump start-up)

Shutdown Supply Current MAX222/242

TA= -55°C to +125°C 35 100

µA

SHDN Input Leakage Current

MAX222/242 ±1 µA

SHDN Threshold Low

MAX222/242 1.4 0.8 V

250

MAX222/232A/233A/242/243 1.3 3.5

µs

t

PHLT

MAX220 410

Transmitter-Output Disable Time
(SHDN goes low), Figure 4

t

DT

MAX222/232A/233A/242/243 1.5 3.5

Transmitter Propagation Delay
TLL to RS-232 (normal operation),
Figure 1

t

PLHT

MAX220 510

µs

V2.0 1.4

MAX222/242, 0.1µF caps

µA±0.05 ±10

600

TTL/CMOS Output Leakage Current

EN Input Threshold High

MAX222/232A/233A/242/243 0.5 1

ns

t

PHLR

MAX220 0.6 3

t

PLHR

MAX222/232A/233A/242/243 0.6 1

Receiver Propagation Delay
RS-232 to TLL (normal operation),
Figure 2

t

PHLT

- t

PLHT

MAX220 0.8 3

µs

MAX222/232A/233A/242/243

t

PHLS

MAX242 0.5 10

Receiver Propagation Delay
RS-232 to TLL (shutdown), Figure 2

t

PLHS

MAX242 2.5 10

µs

Receiver-Output Enable Time, Figure 3 t

ER

MAX242

UNITSMIN TYP MAX

125 500

PARAMETER

MAX242

ns

SHDN = VCCor EN = V

CC

(SHDN = 0V for MAX222),

0V ≤ V

OUT

≤ V

CC

Receiver-Output Disable Time, Figure 3 t

DR

MAX242 160 500 ns

300

ns

Transmitter + to - Propagation
Delay Difference (normal operation)

MAX220 2000

t

PHLR

- t

PLHR

MAX222/232A/233A/242/243 100

ns

Receiver + to - Propagation
Delay Difference (normal operation)

MAX220 225

V1.4 0.8

EN Input Threshold Low

MAX242

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

4 _______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243

10

8

-10
0 5 15 25

OUTPUT VOLTAGE vs. LOAD CURRENT

-4

-6

-8

-2

6

4

2

MAX220-01

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

10

0

20

0.1µF

EITHER V+ OR V- LOADED

V

CC

= ±5V
NO LOAD ON
TRANSMITTER OUTPUTS
(EXCEPT MAX220, MAX233A)

V- LOADED, NO LOAD ON V+

V+ LOADED, NO LOAD ON V-

1µF

1µF

0.1µF

11

10

4

010 40 60

AVAILABLE OUTPUT CURRENT

vs. DATA RATE

6

5

7

9

8

MAX220-02

DATA RATE (kbits/sec)

OUTPUT CURRENT (mA)

20 30 50

OUTPUT LOAD CURRENT
FLOWS FROM V+ TO V-

VCC = +5.25V

ALL CAPS
1µF

ALL CAPS

0.1µF
VCC = +4.75V

+10V

-10V

MAX222/MAX242

ON-TIME EXITING SHUTDOWN

+5V

+5V

0V

0V

MAX220-03

500µs/div

V+, V- VOLTAGE (V)

1µF CAPS

V+

V+

V-

V-

SHDN

0.1µF CAPS

1µF CAPS

0.1µF CAPS

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

_______________________________________________________________________________________ 5

VCC...........................................................................-0.3V to +6V

V+ ................................................................(V

CC

- 0.3V) to +14V

V- ............................................................................+0.3V to -14V

Input Voltages

T

IN

............................................................-0.3V to (VCC+ 0.3V)

R

IN

......................................................................................±30V

Output Voltages

T

OUT

...................................................(V+ + 0.3V) to (V- - 0.3V)

R

OUT

.........................................................-0.3V to (VCC+ 0.3V)

Short-Circuit Duration, T

OUT

......................................Continuous

Continuous Power Dissipation (T

A

= +70°C)

14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW

16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW

20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW

24-Pin Narrow Plastic DIP

(derate 13.33mW/°C above +70°C) ..........1.07W

24-Pin Plastic DIP (derate 9.09mW/°C above +70°C)......500mW

16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW

20-Pin Wide SO (derate 10 00mW/°C above +70°C).......800mW

24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW

28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W

44-Pin Plastic FP (derate 11.11mW/°C above +70°C) .....889mW

14-Pin CERDIP (derate 9.09mW/°C above +70°C) ..........727mW

16-Pin CERDIP (derate 10.00mW/°C above +70°C) ........800mW

20-Pin CERDIP (derate 11.11mW/°C above +70°C) ........889mW

24-Pin Narrow CERDIP

(derate 12.50mW/°C above +70°C) ..............1W

24-Pin Sidebraze (derate 20.0mW/°C above +70°C)..........1.6W

28-Pin SSOP (derate 9.52mW/°C above +70°C).............762mW

Operating Temperature Ranges

MAX2 _ _ C _ _......................................................0°C to +70°C

MAX2 _ _ E _ _ ...................................................-40°C to +85°C

MAX2 _ _ M _ _ ...............................................-55°C to +125°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering, 10sec) .............................+300°C

ABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241

ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241

(MAX223/230/232/234/236/237/238/240/241, VCC= +5V ±10; MAX233/MAX235, VCC= 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,
V

CC

= 5V ±10%; V+ = 7.5V to 13.2V; TA= T

MIN

to T

MAX

; unless otherwise noted.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

CONDITIONS

MIN TYP MAX

UNITS

Output Voltage Swing All transmitter outputs loaded with 3kΩ to ground ±5.0 ±7.3 V

VCCPower-Supply Current

No load,
TA= +25°C

510

mA

715

0.4 1

V+ Power-Supply Current

1.8 5
mA

515

Shutdown Supply Current TA= +25°C

15 50

VInput Logic Threshold High

T

IN

2.0

EN, SHDN (MAX223);
EN, SHDN (MAX230/235/236/240/241)

2.4

Logic Pull-Up Current T

IN

=0V 1.5 200

Receiver Input Voltage
Operating Range

-30 30 V

µA

µA

110

VInput Logic Threshold Low

TIN; EN, SHDN (MAX233); EN, SHDN (MAX230/235–241)

0.8

MAX231/239

MAX223/230/234–238/240/241

MAX232/233

PARAMETER

MAX239

MAX230/235/236/240/241

MAX231

MAX223

mA

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

6 _______________________________________________________________________________________

V

0.8 1.2

PARAMETER MIN TYP MAX UNITSCONDITIONS

Normal operation

SHDN = 5V (MAX223)
SHDN = 0V (MAX235/236/240/241)

1.7 2.4

RS-232 Input Threshold Low

TA= +25°C,
VCC= 5V

0.6 1.5

VRS-232 Input Threshold High

TA= +25°C,
VCC= 5V

Shutdown (MAX223)

SHDN = 0V,
EN = 5V (R4

IN

‚ R5IN)

1.5 2.4

ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued)

(MAX223/230/232/234/236/237/238/240/241, VCC= +5V ±10; MAX233/MAX235, VCC= 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,
V

CC

= 5V ±10%; V+ = 7.5V to 13.2V; TA= T

MIN

to T

MAX

; unless otherwise noted.)

Shutdown (MAX223)

SHDN = 0V,
EN = 5V (R4

IN

, R5IN)

Normal operation

SHDN = 5V (MAX223)
SHDN = 0V (MAX235/236/240/241)

RS-232 Input Hysteresis VCC= 5V, no hysteresis in shutdown 0.2 0.5 1.0 V

RS-232 Input Resistance TA= +25°C, VCC= 5V 357kΩ

TTL/CMOS Output Voltage Low I

OUT

= 1.6mA (MAX231/232/233, I

OUT

= 3.2mA) 0.4 V

TTL/CMOS Output Voltage High I

OUT

= -1mA 3.5 VCC- 0.4 V

TTL/CMOS Output Leakage Current

0V ≤ R

OUT

≤ VCC; EN = 0V (MAX223);

EN = V

CC

(MAX235–241 )

0.05 ±10 µA

MAX223 600

nsReceiver Output Enable Time

Normal
operation

MAX235/236/239/240/241 400

MAX223 900

nsReceiver Output Disable Time

Normal
operation

MAX235/236/239/240/241 250

Normal operation 0.5 10

µs

SHDN = 0V
(MAX223)

440

Propagation Delay

RS-232 IN to
TTL/CMOS OUT,
CL= 150pF

640

3 5.1 30

V/µs

MAX231/MAX232/MAX233, TA= +25°C, VCC= 5V,
R

L

= 3kΩ to 7kΩ, CL= 50pF to 2500pF, measured from

+3V to -3V or -3V to +3V

430

Transmitter Output Resistance VCC= V+ = V- = 0V, V

OUT

= ±2V 300 Ω

Transmitter Output Short-Circuit
Current

±10 mA

t

PHLS

t

PLHS

Transition Region Slew Rate

MAX223/MAX230/MAX234–241, TA= +25°C, VCC= 5V,
RL= 3kΩ to 7kΩ‚ CL= 50pF to 2500pF, measured from
+3V to -3V or -3V to +3V

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

_______________________________________________________________________________________ 7

8.5

6.5

4.5 5.5

TRANSMITTER OUTPUT
VOLTAGE (V

OH

) vs. V

CC

7.0

8.0

MAX220-04

VCC (V)

V

OH

(V)

5.0

7.5

1 TRANSMITTER
LOADED

3 TRANS­MITTERS
LOADED

4 TRANSMITTERS
LOADED

2 TRANSMITTERS
LOADED

TA = +25°C
C1–C4 = 1µF
TRANSMITTER
LOADS =
3kΩ || 2500pF

7.4

6.0
0 2500

TRANSMITTER OUTPUT VOLTAGE (VOH)

vs. LOAD CAPACITANCE AT

DIFFERENT DATA RATES

6.4

6.2

7.2

7.0

MAX220-05

LOAD CAPACITANCE (pF)

V

OH

(V)

15001000500 2000

6.8

6.6

160kbits/sec
80kbits/sec
20kbits/sec

TA = +25°C
V

CC

= +5V
3 TRANSMITTERS LOADED
R

L

= 3kΩ

C1–C4 = 1µF

12.0

4.0
0 2500

TRANSMITTER SLEW RATE

vs. LOAD CAPACITANCE

6.0

5.0

11.0

9.0

10.0

MAX220-06

LOAD CAPACITANCE (pF)

SLEW RATE (V/µs)

15001000500 2000

8.0

7.0

TA = +25°C
V

CC

= +5V

LOADED, R

L

= 3kΩ

C1–C4 = 1µF

1 TRANSMITTER LOADED

2 TRANSMITTERS
LOADED

3 TRANSMITTERS
LOADED

4 TRANSMITTERS
LOADED

-6.0

-9.0

4.5 5.5

TRANSMITTER OUTPUT

VOLTAGE (V

OL

) vs. V

CC

-8.0

-8.5

-6.5

-7.0

MAX220-07

VCC (V)

V

OL

(V)

5.0

-7.5

4 TRANS­MITTERS
LOADED

TA = +25°C
C1–C4 = 1µF
TRANSMITTER
LOADS =
3kΩ || 2500pF

1 TRANS­MITTER
LOADED

2 TRANS­MITTERS
LOADED

3 TRANS­MITTERS
LOADED

-6.0

-7.6
0 2500

TRANSMITTER OUTPUT VOLTAGE (VOL)

vs. LOAD CAPACITANCE AT

DIFFERENT DATA RATES

-7.0

-7.2

-7.4

-6.2

-6.4

MAX220-08

LOAD CAPACITANCE (pF)

V

OL

(V)

15001000500 2000

-6.6

-6.8

160kbits/sec
80kbits/sec
20Kkbits/sec

TA = +25°C
V

CC

= +5V
3 TRANSMITTERS LOADED
R

L

= 3kΩ

C1–C4 = 1µF

10

-10
0 5 10 15 20 25 30 35 40 45 50

TRANSMITTER OUTPUT VOLTAGE (V+, V-)

vs. LOAD CURRENT

-2

-6

-4

-8

8

6

MAX220-09

CURRENT (mA)

V+, V- (V)

4

2

0

V+ AND V­EQUALLY
LOADED

V- LOADED,
NO LOAD
ON V+

TA = +25°C
V

CC

= +5V

C1–C4 = 1µF

ALL TRANSMITTERS UNLOADED

V+ LOADED,
NO LOAD
ON V-

__________________________________________Typical Operating Characteristics

MAX223/MAX230–MAX241

*SHUTDOWN POLARITY IS REVERSED
FOR NON MAX241 PARTS

V+, V- WHEN EXITING SHUTDOWN

(1µF CAPACITORS)

MAX220-13

SHDN*

V-

O

V+

500ms/div

Input Logic Threshold Low

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

8 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249

ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249

(MAX225, VCC= 5.0V ±5%; MAX244–MAX249, VCC= +5.0V ±10%, external capacitors C1–C4 = 1µF; TA= T

MIN

to T

MAX

; unless oth-

erwise noted.)

Note 4: Input voltage measured with transmitter output in a high-impedance state, shutdown, or V

CC

= 0V.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Supply Voltage (VCC) ...............................................-0.3V to +6V

Input Voltages

T

IN

‚ ENA, ENB, ENR, ENT, ENRA,

ENRB, ENTA, ENTB..................................-0.3V to (V

CC

+ 0.3V)

R

IN

.....................................................................................±25V

T

OUT

(Note 3).....................................................................±15V

R

OUT

........................................................-0.3V to (VCC+ 0.3V)

Short Circuit (one output at a time)

T

OUT

to GND ............................................................Continuous

R

OUT

to GND............................................................Continuous

Continuous Power Dissipation (T

A

= +70°C)

28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W

40-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ...611mW

44-Pin PLCC (derate 13.33mW/°C above +70°C) ...........1.07W

Operating Temperature Ranges

MAX225C_ _, MAX24_C_ _ ..................................0°C to +70°C

MAX225E_ _, MAX24_E_ _ ...............................-40°C to +85°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering,10sec) ..............................+300°C

VCC= 0V,
V

OUT

= ±15V

µATables 1a–1d

±0.01 ±25

Normal operation

Shutdown

Tables 1a–1d, normal operation

All transmitter outputs loaded with 3kΩ to GND

ENA, ENB, ENT, ENTA, ENTB =
V

CC,VOUT

= ±15V

VRS-232 Input Hysteresis

RS-232 Input Threshold Low V

V±5 ±7.5Output Voltage Swing

Output Leakage Current (shutdown)

±0.01 ±25

Ω300 10MVCC= V+ = V- = 0V, V

OUT

= ±2V (Note 4)Transmitter Output Resistance

µA

PARAMETER

±0.05 ±0.10

MIN TYP MAX UNITS

Normal operation, outputs disabled,
Tables 1a–1d, 0V ≤ V

OUT

≤ VCC, ENR_ = V

CC

TTL/CMOS Output Leakage Current

10 30Shrinking V

OUT

= V

CC

mA

-2 -10Sourcing V

OUT

= GND

V3.5 VCC- 0.2I

OUT

= -1.0mATTL/CMOS Output Voltage High

V0.2 0.4I

OUT

= 3.2mATTL/CMOS Output Voltage Low

kΩ357

0.2 0.5 1.0VCC= 5V

1.4 0.8 V

TTL/CMOS Output Short-Circuit Current

V1.8 2.4

0.8 1.3VCC= 5V

RS-232 Input Resistance

V±25RS-232 Input Voltage Operating Range

mA±7 ±30V

OUT

= 0VOutput Short-Circuit Current

kbits/sec120 64Data Rate

CONDITIONS

VCC= 5V

µA

±0.01 ±1

Logic Pull-Up/lnput Current

10 50

Tables 1a–1d

RS-232 Input Threshold High

V2 1.4Input Logic Threshold High

RS-232 TRANSMITTERS

RS-232 RECEIVERS

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

_______________________________________________________________________________________ 9

Operating Supply Voltage

4.75 5.25
V

Transmitter Enable Time

MAX225 10 20

t

ET

No load

MAX244–MAX249 11 30

51030

MAX225 40

VCCSupply Current
(normal operation)

3kΩ loads on
all outputs

MAX244–MAX249 57

mA

Transition Slew Rate

825

CL= 50pF to 2500pF, RL= 3kΩ to 7kΩ, VCC= 5V,
T

A

= +25°C, measured from +3V to -3V or -3V to +3V

TA= T

MIN

to T

MAX

CONDITIONS

50

V/µs

MAX246–MAX249

(excludes charge-pump start-up)

Shutdown Supply Current µA

5

t

PHLT

1.3 3.5

µs

t

PLHT

1.5 3.5

Transmitter Disable Time, Figure 4

Transmitter Propagation Delay
TLL to RS-232 (normal operation),
Figure 1

µs

t

DT

100 ns

Transmitter + to - Propagation
Delay Difference (normal operation)

t

PHLT

- t

PLHT

UNITSMIN TYP MAX

350

PARAMETER

ns

Receiver + to - Propagation
Delay Difference (normal operation)

t

PHLR

- t

PLHR

350 ns

4.5 5.5MAX244–MAX249

MAX225

Leakage current ±1

Threshold low 1.4 0.8

Control Input

Threshold high 2.4 1.4

V

µA

TA= +25°C

t

PHLR

0.6 1.5

t

PLHR

0.6 1.5

Receiver Propagation Delay
TLL to RS-232 (normal operation),
Figure 2

µs

t

PHLS

0.6 10

t

PLHS

3.0 10

Receiver Propagation Delay
TLL to RS-232 (low-power mode),
Figure 2

µs

Receiver-Output Enable Time, Figure 3 t

ER

100 500 ns

Receiver-Output Disable Time, Figure 3 t

DR

100 500 ns

MAX225/MAX245–MAX249

(includes charge-pump start-up)

10 ms

POWER SUPPLY AND CONTROL LOGIC

AC CHARACTERISTICS

Note 5: The 300Ω minimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or VCC=

0V is 10MΩ as is implied by the leakage specification.

ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249 (continued)

(MAX225, VCC= 5.0V ±5%; MAX244–MAX249, VCC= +5.0V ±10%, external capacitors C1–C4 = 1µF; TA= T

MIN

to T

MAX

; unless oth-

erwise noted.)

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

10 ______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

MAX225/MAX244–MAX249

18

2

012345

TRANSMITTER SLEW RATE

vs. LOAD CAPACITANCE

8

6

4

16

MAX220-10

LOAD CAPACITANCE (nF)

TRANSMITTER SLEW RATE (V/µs)

14

12

10

V

CC

= 5V

EXTERNAL POWER SUPPLY
1µF CAPACITORS

40kb/s DATA RATE
8 TRANSMITTERS
LOADED WITH 3kΩ

10

-10
0 5 10 15 20 25 30 35

OUTPUT VOLTAGE

vs. LOAD CURRENT FOR V+ AND V-

-2

-4

-6

-8

8

MAX220-11

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

6

4

2

0

V+ AND V- LOADED

EITHER V+ OR
V- LOADED

V+ AND V- LOADED

VCC = 5V
EXTERNAL CHARGE PUMP
1µF CAPACITORS
8 TRANSMITTERS
DRIVING 5kΩ AND
2000pF AT 20kbits/sec

V- LOADED

V+ LOADED

9.0

5.0
01

2

345

TRANSMITTER OUTPUT VOLTAGE (V+, V-)

vs. LOAD CAPACITANCE AT

DIFFERENT DATA RATES

6.0

5.5

8.5

MAX220-12

LOAD CAPACITANCE (nF)

V+, V (V)

8.0

7.5

7.0

6.5

VCC = 5V WITH ALL TRANSMITTERS DRIVEN

LOADED WITH 5kΩ

10kb/sec

20kb/sec

40kb/sec

60kb/sec

100kb/sec

200kb/sec

ALL CAPACITIORS 1µF

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 11

INPUT

OUTPUT

+3V

V+

0V
V-

0V

t

PLHT

t

PHLT

t

PHLR

t

PHLS

t

PLHR

t

PLHS

50%

V

CC

50%

+3V

50%

INPUT

OUTPUT

*EXCEPT FOR R2 ON THE MAX243
WHERE -3V IS USED.

0V*

50%

GND

Figure 1. Transmitter Propagation-Delay Timing

Figure 2. Receiver Propagation-Delay Timing

EN

R

X

IN

a) TEST CIRCUIT

b) ENABLE TIMING

c) DISABLE TIMING

EN INPUT

RECEIVER
OUTPUTS

R

X

OUT

R

X

1k

0V

+3V

EN

EN

+0.8V

+3.5V

OUTPUT ENABLE TIME (t

ER

)

V

CC

- 2V

V

OL

+ 0.5V

V

OH

- 0.5V

OUTPUT DISABLE TIME (t

DR

)

V

CC

- 2V

+3V

0V

150pF

EN INPUT

V

OH

RECEIVER
OUTPUTS

V

OL

1 OR 0

T

X

3k

50pF

-5V

+5V

OUTPUT DISABLE TIME (t

DT

)

V+

SHDN

+3V

0V

V-

0V

a) TIMING DIAGRAM

b) TEST CIRCUIT

Figure 3. Receiver-Output Enable and Disable Timing

Figure 4. Transmitter-Output Disable Timing

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

12 ______________________________________________________________________________________

ENT ENR

OPERATION STATUS TRANSMITTERS RECEIVERS

0 0 Normal Operation All Active All Active

0 1 Normal Operation All Active All 3-State

1 0 Shutdown All 3-State All Low-Power Receive Mode

1 1 Shutdown All 3-State All 3-State

Table 1a. MAX245 Control Pin Configurations

ENT ENR

OPERATION

STATUS

TRANSMITTERS RECEIVERS

TA1–TA4 TB1–TB4 RA1–RA5 RB1–RB5

0 0 Normal Operation All Active All Active All Active All Active

0 1 Normal Operation All Active All Active

RA1–RA4 3-State,
RA5 Active

RB1–RB4 3-State,
RB5 Active

1 0 Shutdown All 3-State All 3-State

All Low-Power
Receive Mode

All Low-Power
Receive Mode

1 1 Shutdown All 3-State All 3-State

RA1–RA4 3-State,
RA5 Low-Power
Receive Mode

RB1–RB4 3-State,
RB5 Low-Power
Receive Mode

Table 1b. MAX245 Control Pin Configurations

Table 1c. MAX246 Control Pin Configurations

ENA ENB

OPERATION

STATUS

TRANSMITTERS RECEIVERS

TA1–TA4 TB1–TB4 RA1–RA5 RB1–RB5

0 0 Normal Operation All Active All Active All Active All Active

0 1 Normal Operation All Active All 3-State All Active

RB1–RB4 3-State,
RB5 Active

1 0 Shutdown All 3-State All Active

RA1–RA4 3-State,
RA5 Active

All Active

1 1 Shutdown All 3-State All 3-State

RA1–RA4 3-State,
RA5 Low-Power
Receive Mode

RB1–RB4 3-State,
RA5 Low-Power
Receive Mode

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 13

TA1–TA4 TB1–TB4 RA1–RA4 RB1–RB4

0 0 0 0 Normal Operation All Active All Active All Active All Active

0 0 0 1 Normal Operation All Active All Active All Active

All 3-State, except
RB5 stays active on
MAX247

0 0 1 0 Normal Operation All Active All Active All 3-State All Active

0 0 1 1 Normal Operation All Active All Active All 3-State

All 3-State, except
RB5 stays active on
MAX247

0 1 0 0 Normal Operation All Active All 3-State All Active All Active

0 1 0 1 Normal Operation All Active All 3-State All Active

All 3-State, except
RB5 stays active on
MAX247

0 1 1 0 Normal Operation All Active All 3-State All 3-State All Active

0 1 1 1 Normal Operation All Active All 3-State All 3-State

All 3-State, except
RB5 stays active on
MAX247

1 0 0 0 Normal Operation All 3-State All Active All Active All Active

1 0 0 1 Normal Operation All 3-State All Active All Active

All 3-State, except
RB5 stays active on
MAX247

1 0 1 0 Normal Operation All 3-State All Active All 3-State All Active

1 0 1 1 Normal Operation All 3-State All Active All 3-State

All 3-State, except
RB5 stays active on
MAX247

1 1 0 0 Shutdown All 3-State All 3-State

Low-Power
Receive Mode

Low-Power
Receive Mode

1 1 0 1 Shutdown All 3-State All 3-State

Low-Power
Receive Mode

All 3-State, except
RB5 stays active on
MAX247

1 1 1 0 Shutdown All 3-State All 3-State All 3-State

Low-Power
Receive Mode

1 1 1 1 Shutdown All 3-State All 3-State All 3-State

All 3-State, except
RB5 stays active on
MAX247

Table 1d. MAX247/MAX248/MAX249 Control Pin Configurations

MAX248

OPERATION

STATUS

ENRB

MAX247 TA1–TA4 TB1–TB4 RA1–RA4 RB1–RB5

TRANSMITTERS

ENRAENTBENTA

MAX249 TA1–TA3 TB1–TB3 RA1–RA5 RB1–RB5

RECEIVERS

MAX220–MAX249

_______________Detailed Description

The MAX220–MAX249 contain four sections: dual
charge-pump DC-DC voltage converters, RS-232 dri­vers, RS-232 receivers, and receiver and transmitter
enable control inputs.

Dual Charge-Pump Voltage Converter

The MAX220–MAX249 have two internal charge-pumps
that convert +5V to ±10V (unloaded) for RS-232 driver
operation. The first converter uses capacitor C1 to dou­ble the +5V input to +10V on C3 at the V+ output. The
second converter uses capacitor C2 to invert +10V to

-10V on C4 at the V- output.

A small amount of power may be drawn from the +10V
(V+) and -10V (V-) outputs to power external circuitry
(see the Typical Operating Characteristics section),
except on the MAX225 and MAX245–MAX247, where
these pins are not available. V+ and V- are not regulated,
so the output voltage drops with increasing load current.
Do not load V+ and V- to a point that violates the mini­mum ±5V EIA/TIA-232E driver output voltage when
sourcing current from V+ and V- to external circuitry.

When using the shutdown feature in the MAX222,
MAX225, MAX230, MAX235, MAX236, MAX240,
MAX241, and MAX245–MAX249, avoid using V+ and V­to power external circuitry. When these parts are shut
down, V- falls to 0V, and V+ falls to +5V. For applica­tions where a +10V external supply is applied to the V+
pin (instead of using the internal charge pump to gen­erate +10V), the C1 capacitor must not be installed and
the SHDN pin must be tied to V

CC

. This is because V+

is internally connected to VCCin shutdown mode.

RS-232 Drivers

The typical driver output voltage swing is ±8V when
loaded with a nominal 5kΩ RS-232 receiver and VCC=
+5V. Output swing is guaranteed to meet the EIA/TIA­232E and V.28 specification, which calls for ±5V mini­mum driver output levels under worst-case conditions.
These include a minimum 3kΩ load, VCC= +4.5V, and
maximum operating temperature. Unloaded driver out­put voltage ranges from (V+ -1.3V) to (V- +0.5V).

Input thresholds are both TTL and CMOS compatible.
The inputs of unused drivers can be left unconnected
since 400kΩ input pull-up resistors to VCCare built in
(except for the MAX220). The pull-up resistors force the
outputs of unused drivers low because all drivers invert.
The internal input pull-up resistors typically source 12µA,
except in shutdown mode where the pull-ups are dis­abled. Driver outputs turn off and enter a high-imped­ance state—where leakage current is typically
microamperes (maximum 25µA)—when in shutdown

mode, in three-state mode, or when device power is
removed. Outputs can be driven to ±15V. The power­supply current typically drops to 8µA in shutdown mode.
The MAX220 does not have pull-up resistors to force the
ouputs of the unused drivers low. Connect unused inputs
to GND or V

CC

.

The MAX239 has a receiver three-state control line, and
the MAX223, MAX225, MAX235, MAX236, MAX240,
and MAX241 have both a receiver three-state control
line and a low-power shutdown control. Table 2 shows
the effects of the shutdown control and receiver three­state control on the receiver outputs.

The receiver TTL/CMOS outputs are in a high-imped­ance, three-state mode whenever the three-state enable
line is high (for the MAX225/MAX235/MAX236/MAX239–
MAX241), and are also high-impedance whenever the
shutdown control line is high.

When in low-power shutdown mode, the driver outputs
are turned off and their leakage current is less than 1µA
with the driver output pulled to ground. The driver output
leakage remains less than 1µA, even if the transmitter
output is backdriven between 0V and (VCC+ 6V). Below

-0.5V, the transmitter is diode clamped to ground with
1kΩ series impedance. The transmitter is also zener
clamped to approximately VCC+ 6V, with a series
impedance of 1kΩ.

The driver output slew rate is limited to less than 30V/µs
as required by the EIA/TIA-232E and V.28 specifica­tions. Typical slew rates are 24V/µs unloaded and
10V/µs loaded with 3Ω and 2500pF.

RS-232 Receivers

EIA/TIA-232E and V.28 specifications define a voltage
level greater than 3V as a logic 0, so all receivers invert.
Input thresholds are set at 0.8V and 2.4V, so receivers
respond to TTL level inputs as well as EIA/TIA-232E and
V.28 levels.

The receiver inputs withstand an input overvoltage up
to ±25V and provide input terminating resistors with

+5V-Powered, Multichannel RS-232
Drivers/Receivers

14 ______________________________________________________________________________________

PART

SHDN

EN EN(R) RECEIVERS

MAX223 __

Low
High
High

X
Low
High

High Impedance
Active
High Impedance

MAX225 __ __

High Impedance
Active

__

MAX235
MAX236
MAX240

Low
Low
High

__ __

Low
High
X

High Impedance
Active
High Impedance

Table 2. Three-State Control of Receivers

Low
High

SHDN

__

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 15

nominal 5kΩ values. The receivers implement Type 1
interpretation of the fault conditions of V.28 and
EIA/TIA-232E.

The receiver input hysteresis is typically 0.5V with a
guaranteed minimum of 0.2V. This produces clear out­put transitions with slow-moving input signals, even
with moderate amounts of noise and ringing. The
receiver propagation delay is typically 600ns and is
independent of input swing direction.

Low-Power Receive Mode

The low-power receive-mode feature of the MAX223,
MAX242, and MAX245–MAX249 puts the IC into shut­down mode but still allows it to receive information. This
is important for applications where systems are periodi­cally awakened to look for activity. Using low-power
receive mode, the system can still receive a signal that
will activate it on command and prepare it for communi­cation at faster data rates. This operation conserves
system power.

Negative Threshold—MAX243

The MAX243 is pin compatible with the MAX232A, differ­ing only in that RS-232 cable fault protection is removed
on one of the two receiver inputs. This means that control
lines such as CTS and RTS can either be driven or left
floating without interrupting communication. Different
cables are not needed to interface with different pieces of
equipment.

The input threshold of the receiver without cable fault
protection is -0.8V rather than +1.4V. Its output goes
positive only if the input is connected to a control line
that is actively driven negative. If not driven, it defaults
to the 0 or “OK to send” state. Normally‚ the MAX243’s
other receiver (+1.4V threshold) is used for the data line
(TD or RD)‚ while the negative threshold receiver is con­nected to the control line (DTR‚ DTS‚ CTS‚ RTS, etc.).

Other members of the RS-232 family implement the
optional cable fault protection as specified by EIA/TIA­232E specifications. This means a receiver output goes
high whenever its input is driven negative‚ left floating‚
or shorted to ground. The high output tells the serial
communications IC to stop sending data. To avoid this‚
the control lines must either be driven or connected
with jumpers to an appropriate positive voltage level.

Shutdown—MAX222–MAX242

On the MAX222‚ MAX235‚ MAX236‚ MAX240‚ and
MAX241‚ all receivers are disabled during shutdown.
On the MAX223 and MAX242‚ two receivers continue to
operate in a reduced power mode when the chip is in
shutdown. Under these conditions‚ the propagation
delay increases to about 2.5µs for a high-to-low input
transition. When in shutdown, the receiver acts as a
CMOS inverter with no hysteresis. The MAX223 and
MAX242 also have a receiver output enable input (EN
for the MAX242 and EN for the MAX223) that allows
receiver output control independent of SHDN (SHDN
for MAX241). With all other devices‚ SHDN (SHDN for
MAX241) also disables the receiver outputs.

The MAX225 provides five transmitters and five
receivers‚ while the MAX245 provides ten receivers and
eight transmitters. Both devices have separate receiver
and transmitter-enable controls. The charge pumps
turn off and the devices shut down when a logic high is
applied to the ENT input. In this state, the supply cur­rent drops to less than 25µA and the receivers continue
to operate in a low-power receive mode. Driver outputs
enter a high-impedance state (three-state mode). On
the MAX225‚ all five receivers are controlled by the
ENR input. On the MAX245‚ eight of the receiver out­puts are controlled by the ENR input‚ while the remain­ing two receivers (RA5 and RB5) are always active.
RA1–RA4 and RB1–RB4 are put in a three-state mode
when ENR is a logic high.

Receiver and Transmitter Enable

Control Inputs

The MAX225 and MAX245–MAX249 feature transmitter
and receiver enable controls.

The receivers have three modes of operation: full-speed
receive (normal active)‚ three-state (disabled)‚ and low­power receive (enabled receivers continue to function
at lower data rates). The receiver enable inputs control
the full-speed receive and three-state modes. The
transmitters have two modes of operation: full-speed
transmit (normal active) and three-state (disabled). The
transmitter enable inputs also control the shutdown
mode. The device enters shutdown mode when all
transmitters are disabled. Enabled receivers function in
the low-power receive mode when in shutdown.

MAX220–MAX249

Tables 1a–1d define the control states. The MAX244
has no control pins and is not included in these tables.

The MAX246 has ten receivers and eight drivers with
two control pins, each controlling one side of the
device. A logic high at the A-side control input (ENA)
causes the four A-side receivers and drivers to go into
a three-state mode. Similarly, the B-side control input
(ENB) causes the four B-side drivers and receivers to
go into a three-state mode. As in the MAX245, one A­side and one B-side receiver (RA5 and RB5) remain
active at all times. The entire device is put into shut­down mode when both the A and B sides are disabled
(ENA = ENB = +5V).

The MAX247 provides nine receivers and eight drivers
with four control pins. The ENRA and ENRB receiver
enable inputs each control four receiver outputs. The
ENTA and ENTB transmitter enable inputs each control
four drivers. The ninth receiver (RB5) is always active.
The device enters shutdown mode with a logic high on
both ENTA and ENTB.

The MAX248 provides eight receivers and eight drivers
with four control pins. The ENRA and ENRB receiver
enable inputs each control four receiver outputs. The
ENTA and ENTB transmitter enable inputs control four
drivers each. This part does not have an always-active
receiver. The device enters shutdown mode and trans­mitters go into a three-state mode with a logic high on
both ENTA and ENTB.

The MAX249 provides ten receivers and six drivers with
four control pins. The ENRA and ENRB receiver enable
inputs each control five receiver outputs. The ENTA
and ENTB transmitter enable inputs control three dri­vers each. There is no always-active receiver. The
device enters shutdown mode and transmitters go into
a three-state mode with a logic high on both ENTA and
ENTB. In shutdown mode, active receivers operate in a
low-power receive mode at data rates up to
20kbits/sec.

__________Applications Information

Figures 5 through 25 show pin configurations and typi­cal operating circuits. In applications that are sensitive
to power-supply noise, VCCshould be decoupled to
ground with a capacitor of the same value as C1 and
C2 connected as close as possible to the device.

+5V-Powered, Multichannel RS-232
Drivers/Receivers

16 ______________________________________________________________________________________

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 17

TOP VIEW

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

V

CC

GND

T1

OUT

R1

IN

C2+

C1-

V+

C1+

MAX220
MAX232

MAX232A

R1

OUT

T1

IN

T2

IN

R2

OUT

R2

IN

T2

OUT

V-

C2-

DIP/SO

V+

V-

2

+10V

C1+

C1

C2

1

3
4

5

11

10

12

9

6

14

7

13

8

T1

IN

R1

OUT

T2

IN

R2

OUT

T1

OUT

R1

I

N

T2

OUT

R2

IN

+5V INPUT

C2+

-10V

C4

RS-232
OUTPUTS

RS-232
INPUTS

TTL/CMOS

INPUTS

TTL/CMOS

OUTPUTS

GND

15

5k

5k

400k

400k

+5V

+5V

+10V TO -10V

VOLTAGE INVERTER

+5V TO +10V

VOLTAGE DOUBLER

16

C3

C5

CAPACITANCE (µF)

DEVICE
MAX220
MAX232
MAX232A

C1

4.7

1.0

0.1

C2

4.7

1.0

0.1

C3
10

1.0

0.1

C4
10

1.0

0.1

C5

4.7

1.0

0.1

C2-

C1-

V

CC

5k

DIP/SO

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

SHDN

V

CC

GND

T1

OUT

C1-

V+

C1+

(N.C.) EN

R1

IN

R1

OUT

T1

IN

T2

IN

T2

OUT

V-

C2-

C2+

10

9

R2

OUT

R2

IN

MAX222
MAX242

20

19

18

17

16

15

14

13

1

2

3

4

5

6

7

8

SHDN

V

CC

GND

T1

OUT

C1-

V+

C1+

(N.C.) EN

N.C.

R1

IN

R1

OUT

N.C.

T2

OUT

V-

C2-

C2+

12

11

9

10

T1

IN

T2

IN

R2

OUT

R2

IN

MAX222
MAX242

SSOP

( ) ARE FOR MAX222 ONLY.
PIN NUMBERS IN TYPICAL OPERATING CIRCUIT ARE FOR DIP/SO PACKAGES ONLY.

V+

V-

3

+10V

C1

C2

2

4
5

6

12

11

13

7

15

8

14

9

T1

IN

R1

OUT

T2

IN

R2

OUT

T1

OUT

(EXCEPT MAX220)

(EXCEPT MAX220)

R1

IN

T2

OUT

R2

IN

+5V INPUT

C2+

-10V

C4

RS-232
OUTPUTS

RS-232
INPUTS

TTL/CMOS

INPUTS

TTL/CMOS

OUTPUTS

GND

16

5k

400k

400k

+5V

+5V

+10V TO -10V

VOLTAGE INVERTER

V

CC

+5V TO +10V

VOLTAGE DOUBLER

17

C3

C5

1

10

18

SHDN

EN

(N.C.)

ALL CAPACITORS = 0.1µF

C2-

C1+
C1-

TOP VIEW

Figure 5. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit

Figure 6. MAX222/MAX242 Pin Configurations and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

18 ______________________________________________________________________________________

13

14

28

27

26

25

24

23

22

21

1

2

3

4

5

6

7

8

V

CC

V

CC

V

CC

400k

400k

400k

400k

400k

T

1

OUT

+5V

+5V

0.1

+5V

3

28 27

4

25

24

23

26

5

6

7

22

GND

ENR

ENR

GND

21

+5V

+5V

+5V

T

2

OUT

T

3

OUT

T

4

OUT

5k

5k

5k

5k

5k

14

13

2

1

T

5

OUT

T

5

OUT

R

1

IN

R

2

IN

R

3

IN

R

4

IN

R

5

IN

T

1

IN

11

12

18

17

16

15

10

9

8

19

20

T

2

IN

T

3

IN

T

4

IN

T

5

IN

ENT

R

2

OUT

R

3

OUT

R

4

OUT

PINS (ENR, GND, V

CC

, T5OUT) ARE INTERNALLY CONNECTED.

CONNECT EITHER OR BOTH EXTERNALLY. T

5

OUT IS A SINGLE DRIVER.

R

5

OUT

R

1

OUT

V

CC

ENT

T

3

IN

T

2

IN

T

1

IN

ENR

ENR

T

4

IN

T

5

IN

R

4

OUT

R

5

OUT

R

3

IN

R

3

OUT

R

2

OUT

R

1

OUT

20

19

18

17

9

10

11

12

R

5

IN

R

4

IN

T

3

OUT

T

4

OUT

T

2

OUT

T

1

OUT

R

1

IN

R

2

IN

SO

MAX225

16

15

T

5

OUT

MAX225 FUNCTIONAL DESCRIPTION

5 RECEIVERS
5 TRANSMITTERS
2 CONTROL PINS
1 RECEIVER ENABLE (ENR)
1 TRANSMITTER ENABLE (ENT)

T5OUT

GND

GND

TOP VIEW

Figure 7. MAX225 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 19

GND

10

27R3

OUT

23

R4

OUT

R3

IN

R4

IN

5k

5k

5

4

R2

OUT

R2

IN

5k

RS-232
INPUTS

LOGIC

OUTPUTS

RS-232
OUTPUTS

TTL/CMOS

INPUTS

R2

89R1

OUT

R1

IN

5k

R1

R3

R4

19

18

R5

OUT

R5

IN

5k

R5

2

7

T1

IN

T1

OUT

+5V

400k

+5V

6

3

T2

IN

T2

OUT

T2

400k

20

T3

OUT

1

T3

IN

+5V

T3

400k

C1+

C1-

1.0µF

12

V

CC

+5V INPUT

11

17

1.0µF

13

1.0µF

+5V TO +10V

VOLTAGE DOUBLER

26

1.0µF

T1

28

21

T4

IN

T4

OUT

+5V

400k

T4

14

C2+

C2-

15

1.0µF

16

+10V TO -10V

VOLTAGE INVERTER

V+

22

EN (EN)

24

25

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

T4

OUT

R3

IN

R3

OUT

SHDN (SHDN)

R4

IN*

C2+

R4

OUT*

T4

IN

T3

IN

R5

OUT*

R5

IN*

V-

C2-

C1-

V+

C1+

V

CC

GND

R1

IN

R1

OUT

T1

IN

T2

IN

R2

OUT

R2

IN

T2

OUT

T1

OUT

T3

OUT

Wide SO/

SSOP

MAX223
MAX241

EN (EN)

SHDN

(SHDN)

*R4 AND R5 IN MAX223 REMAIN ACTIVE IN SHUTDOWN

NOTE: PIN LABELS IN ( ) ARE FOR MAX241

V-

TOP VIEW

Figure 8. MAX223/MAX241 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

20 ______________________________________________________________________________________

20

19

18

17

16

15

14

13

1

2

3

4

5

6

7

8

T5

IN

N.C.

SHDN

T2

IN

T2

OUT

T1

OUT

T5

OUT

T4

IN

T3

IN

V-

C1+

V

CC

GND

T1

IN

12

11

9

10

C2-

C2+

C1-

V+

DIP/SO

MAX230

V+

V-

9

1T

C1+
C1-

8

10

11
12

5

4

14

13

2

3

1

20

T3

IN

T4

IN

T2

IN

T5

IN

T1

OUT

T2

OUT

+5V INPUT

C2+
C2-

RS-232
OUTPUTS

TTL/CMOS

INPUTS

GND

6

400k

+5V

400k

+5V

400k

+5V

400k

+5V

400k

+5V

+10V TO -10V

VOLTAGE INVERTER

V

CC

+5V TO +10V

VOLTAGE DOUBLER

7

1.0µF

1.0µF

1.0µF

1.0µF

19

15

16

T3

OUT

T4

OUT

18

x

T1

IN

T3

OUT

T4

OUT

T5

OUT

17

1.0µF

T1

T2

T3

T4

T5

N.C.

SHDN

TOP VIEW

Figure 9. MAX230 Pin Configuration and Typical Operating Circuit

V+

V-

14

C1+

C1-

1

2

8

7

3

11

4

T2

IN

T1

IN

T1

OUT

T2

OUT

+5V INPUT

RS-232
INPUTS

TTL/CMOS

INPUTS

GND

12 (14)

5k

5k

+12V TO -12V

VOLTAGE CONVERTER

13 (15)

1.0µF

1.0µF
C2

1.0µF

400k

+5V

400k

+5V

6

9

10

R1

IN

R2

IN

R2

OUT

R1

OUT

5

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

V+

V

CC

GND

T1

OUT

T2

OUT

V-

C-

C+

MAX231

R1

IN

R1

OUT

T1

IN

N.C.

N.C.

T2

IN

R2

OUT

R2

IN

SO

(12)

RS-232
OUTPUTS

TTL/CMOS

INPUTS

(11)

(13)(10)

V

CC

PIN NUMBERS IN ( ) ARE FOR SO PACKAGE

14

13

12

11

10

9

8

1

2

3

4

5

6

7

V+

V

CC

GND

T1

OUT

T2

OUT

V-

C-

C+

MAX231

R1

IN

R1

OUT

T1

IN

T2

IN

R2

OUT

R2

IN

DIP

+7.5V TO +12V

(16)

T1

T2

R1

R2

TOP VIEW

Figure 10. MAX231 Pin Configurations and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 21

2

1

5

18

T2

IN

T1

IN

T1

OUT

T2

OUT

+5V INPUT

RS-232
OUTPUTS

TTL/CMOS

OUTPUTS

GND GND

69

400k

+5V

400k

+5V

5k

5k

7

20

3

4

R1

IN

R2

IN

R2

OUT

R1

OUT

19

RS-232
OUTPUTS

TTL/CMOS

INPUTS

V

CC

( ) ARE FOR SO PACKAGE ONLY.

20

19

18

17

16

15

14

13

1

2

3

4

5

6

7

8

R2

IN

T2

OUT

V-

R1

IN

R1

OUT

T1

IN

C2-

C2+

V+ (C1-)

C1- (C1+)

(V+) C1+

V

CC

GND

T1

OUT

12

11

9

10

V- (C2+)

C2+ (C2-)

(V-) CS-

GND

DIP/SO

MAX233

MAX233A

T2

IN

R2

OUT

C1+

C1-

V-

V-

V+

C2+

C2-

C2-

C2+

8 (13)

13 (14)

12 (10)

17

14 (8)

11 (12)

15

16

10 (11)

DO NOT MAKE

CONNECTIONS TO

THESE PINS

INTERNAL -10

POWER SUPPLY

INTERNAL +10V

POWER SUPPLY

1.0µF

TOP VIEW

Figure 11. MAX233/MAX233A Pin Configuration and Typical Operating Circuit

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

T3

OUT

T4

OUT

T4

IN

T3

IN

T1

IN

T2

IN

T2

OUT

T1

OUT

MAX234

V-

C2-

C2+

C1-

V+

C1+

V

CC

GND

DIP/SO

V+

V-

8

C1+

C1-

1.0µF

1.0µF

1.0µF

7

9

10

11

4

3

13

14

12

1

3

16

15

T1

IN

T3

IN

T2

IN

T4

IN

T1

OUT

T3

OUT

T2

OUT

T4

OUT

+5V INPUT

C2-

C2+

RS-232
OUTPUTS

TTL/CMOS

INPUTS

GND

5

+5V

+5V

+10V TO -10V

VOLTAGE INVERTER

V

CC

+5V TO +10V

VOLTAGE DOUBLER

6

+5V

+5V

400k

400k

400k

400k

1.0µF

1.0µF

T1

T2

T4

T3

TOP VIEW

Figure 12. MAX234 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

22 ______________________________________________________________________________________

1.0µF

+5V INPUT

GND

11

6

23

5

R2

OUT

RS-232
INPUTS

TTL/CMOS

OUTPUTS

14

13

21

R5

OUT

5k

17

18

R4

OUT

5k

24

R3

OUT

5k

24

23

22

21

20

19

18

17

1

2

3

4

5

6

7

8

R3

IN

R3

OUT

T5

IN

SHDNT2

OUT

T1

OUT

T3

OUT

T4

OUT

EN

T5

OUT

R4

IN

R4

OUT

T1

IN

T2

IN

R2

OUT

R2

IN

16

15

14

13

9

10

11

12

T4

IN

T3

IN

R5

OUT

R5

IN

V

CC

GND

R1

IN

R1

OUT

DIP

MAX235

5k

910

R1

OUT

R1

IN

R2

IN

R3

IN

R4

IN

R5

IN

5k

7

15

3

4

T2

IN

T3

OUT

RS-232
OUTPUTS

TTL/CMOS

INPUTS

22

19T5

IN

T5

OUT

+5V

16

1T4

IN

T4

OUT

+5V

2

T3

IN

+5V

+5V

8

T1

IN

T1

OUT

+5V

T2

OUT

T1

T1

R2

R3

R4

R5

T2

T3

T5

T4

400k

400k

400k

400k

400k

SHDN

EN

20

12

V

CC

TOP VIEW

Figure 13. MAX235 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 23

GND

8

23

R2

OUT

RS-232
INPUTS

TTL/CMOS

OUTPUTS

17

16

21

R3

OUT

R2

IN

R3

IN

5k

5k

54R1

OUT

R1

IN

5k

RS-232
OUTPUTS

TTL/CMOS

INPUTS

R1

R2

R3

2

7

T1

IN

T1

OUT

+5V

T1

400k

6

3

T2

IN

+5V

T2

OUT

T2

400k

18

T3

OUT

1

T3

IN

+5V

T3

400k

19

24

T4

IN

T4

OUT

+5V

T4

400k

SHDN

EN

20

11

C1+

C1-

1.0µF

10

12

13

14

15

+5V INPUT

C2+

C2-

V

CC

+5V TO +10V

VOLTAGE DOUBLER

9

1.0µF

1.0µF

+10V TO -10V

VOLTAGE INVERTER

22

24

23

22

21

20

19

18

17

1

2

3

4

5

6

7

8

T4

OUT

R2

IN

R2

OUT

SHDNR1

IN

T2

OUT

T1

OUT

T3

OUT

T4

IN

T3

IN

R3

OUT

GND

T1

IN

T2

IN

R1

OUT

16

15

14

13

9

10

11

12

R3

IN

V-

C2-

C2+C1-

V+

C1+

V

CC

DIP/SO

MAX236

EN

1.0µF

1.0µF

TOP VIEW

V+

V-

Figure 14. MAX236 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

24 ______________________________________________________________________________________

GND

8

23

R2

OUT

RS-232
INPUTS

TTL/CMOS

OUTPUTS

17

16

R3

OUT

R2

IN

R3

IN

5k

5k

54R1

OUT

R1

IN

5k

RS-232
OUTPUTS

TTL/CMOS

INPUTS

R1

R2

R3

2

7

T1

IN

T1

OUT

+5V

T1

400k

6

3

T2

IN

+5V

T2

OUT

T2

400k

18

T3

OUT

1

T3

IN

+5V

T3

400k

21

20

T5

IN

T5

OUT

+5V

T5

400k

11

C1+

C1-

1.0µF

10

12

13

14

15

+5V INPUT

C2+

C2-

V

CC

+5V TO +10V

VOLTAGE DOUBLER

9

1.0µF

1.0µF

+10V TO -10V

VOLTAGE INVERTER

22

24

23

22

21

20

19

18

17

1

2

3

4

5

6

7

8

T4

OUT

R2

IN

R2

OUT

T5

IN

R1

IN

T2

OUT

T1

OUT

T3

OUT

T4

IN

T3

IN

R3

OUT

GND

T1

IN

T2

IN

R1

OUT

16

15

14

13

9

10

11

12

R3

IN

V-

C2-

C2+C1-

V+

C1+

V

CC

DIP/SO

MAX237

T5

OUT

1.0µF

1.0µF

19

24

T4

IN

T4

OUT

+5V

T4

400k

V+

V-

TOP VIEW

Figure 15. MAX237 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 25

GND

8

3

R2

OUT

22

23

R3

OUT

R2

IN

R3

IN

5k

5k

67R1

OUT

R1

IN

5k

RS-232
OUTPUTS

TTL/CMOS

INPUTS

RS-232
INPUTS

TTL/CMOS

OUTPUTS

R1

R2

R3

17

16

R4

OUT

R4

IN

5k

R4

2

5

T1

IN

T1

OUT

+5V

400k

+5V

18

1

T2

IN

T2

OUT

T2

400k

19

T3

OUT

24

T3

IN

+5V

T3

400k

11

C1+

C1-

1.0µF

10

12

13

14

15

+5V INPUT

C2+

C2-

V

CC

+5V TO +10V

VOLTAGE DOUBLER

9

1.0µF

1.0µF

+10V TO -10V

VOLTAGE INVERTER

4

1.0µF

1.0µF

21

20

T4

IN

T4

OUT

+5V

T4

400k

T1

24

23

22

21

20

19

18

17

1

2

3

4

5

6

7

8

T3

OUT

R3

IN

R3

OUT

T4

IN

R2

OUT

R2

IN

T1

OUT

T2

OUT

TOP VIEW

T3

IN

T2

IN

R4

OUT

GND

R1

IN

R1

OUT

T1

IN

16

15

14

13

9

10

11

12

R4

IN

V-

C2-

C2+C1-

V+

C1+

V

CC

DIP/SO

MAX238

T4

OUT

V+

V-

Figure 16. MAX238 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

26 ______________________________________________________________________________________

GND

3

18

R3

OUT

12

R4

OUT

R3

IN

R4

IN

5k

5k

2221R2

OUT

R2

IN

5k

RS-232
OUTPUTS

TTL/CMOS

INPUTS

RS-232
INPUTS

TTL/CMOS

OUTPUTS

R2

12R1

OUT

R1

IN

5k

R1

R3

R4

10

9

R5

OUT

R5

IN

5k

R5

19

24

T1

IN

T1

OUT

+5V

400k

+5V

23

20

T2

IN

T2

OUT

T2

400k

16

T3

OUT

13

T3

IN

+5V

T3

400k

C1+

C1-

1.0µF

6

V

CC

8

+5V INPUT

4

5

1.0µF

+10V TO -10V

VOLTAGE INVERTER

17

1.0µF

T1

24

23

22

21

20

19

18

17

1

2

3

4

5

6

7

8

T1

IN

T2

IN

R2

OUT

R2

IN

V

CC

GND

R1

IN

R1

OUT

T1

OUT

R3

IN

R3

OUT

V-

C-

C+

V+

16

15

14

13

9

10

11

12

T3

IN

N.C.

EN

T3

OUT

R4

IN

R4

OUT

R5

OUT

R5

IN

DIP/SO

MAX239

T2

OUT

7.5V TO 13.2V
INPUT

7

V+

11

EN

14

15

N.C.

V-

TOP VIEW

Figure 17. MAX239 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 27

GND

18

4R3

OUT

40

R4

OUT

R3

IN

R4

IN

5k

5k

1310R2

OUT

R2

IN

5k

RS-232
INPUTS

TTL/CMOS

OUTPUTS

RS-232
OUTPUTS

TTL/CMOS

INPUTS

R2

1617R1

OUT

R1

IN

5k

R1

R3

R4

36

35

R5

OUT

R5

IN

5k

R5

7

15

T1

IN

T1

OUT

+5V

400k

+5V

148T2

IN

T2

OUT

T2

400k

37

T3

OUT

6

T3

IN

+5V

T3

400k

C1+

C1-

1.0µF

25

V

CC

+5V INPUT

19

30

1.0µF

26

1.0µF

+5V TO +10V

VOLTAGE DOUBLER

3

1.0µF

T1

+5V

2

41

T5

IN

T5

OUT

T5

400k

5

38

T4

IN

T4

OUT

+5V

400k

T4

27

C2+

C2-

28

1.0µF
29

+5V TO -10V

VOLTAGE INVERTER

V+

39

EN

42

43

Plastic FP

MAX240

SHDN
EN
T5

OUT

R4

IN

R4

OUT

R5

OUT

R5

IN

N.C.

N.C.

T3

IN

T4

IN

R2

OUT

T2

IN

T1

IN

R1

OUT

R1

IN

N.C.
N.C.
N.C.

N.C.

V

CC

GND

R2INN.C.

T4

OUT

T2

OUTT1OUTT3OUT

N.C.

R3INR3

OUT

N.C.

T5

IN

N.C.

C1+

C2

V+

C1-

C2+

N.C.

V-

N.C.

N.C.

N.C.

33

32

31

30

29

28

27

26

25

24

23

34

35

36

37

38

39

40

41

42

43

44

1

2

3

4

5

6

7

8

9

10

11

22

21

20

19

18

17

16

15

14

13

12

SHDN

TOP VIEW

V-

Figure 18. MAX240 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

28 ______________________________________________________________________________________

V+

V-

2

+10V

C1+

C1-

1

3

4

5

11

10

12

9

6

14

7

13

8

T1

IN

R1

OUT

T2

IN

R2

OUT

T1

OUT

R1

IN

T2

OUT

R2

IN

+5V INPUT

C2+

C2-

-10V

RS-232
OUTPUTS

RS-232
INPUTS

TTL/CMOS

INPUTS

TTL/CMOS

OUTPUTS

GND

15

5k

5k

400k

400k

+5V

+5V

+10V TO -10V

VOLTAGE INVERTER

+5V TO +10V

VOLTAGE DOUBLER

16

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

C1+ V

CC

GND

T1

OUT

R1

IN

R1

OUT

T1

IN

T2

IN

R2

OUT

MAX243

DIP/SO

V+

C1-

V-

C2+

C2-

T2

OUT

R2

IN

0.1µF

0.1µF

0.1µF

0.1µF

ALL CAPACITORS = 0.1µF

0.1µF

RECEIVER INPUT

≤ -3 V

OPEN
≥ +3V

R1 OUTPUT

HIGH
HIGH

LOW

R2 OUTPUT

HIGH
LOW
LOW

TOP VIEW

V

CC

Figure 19. MAX243 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 29

400k

+10V TO -10V VOLTAGE INVERTER

+5V TO +10V VOLTAGE DOUBLER

V

CC

400k

400k

GND

+5V

+5V

+5V

+5V

+5V

25

24

23

21

20

2

1µF

1µF

1µF

1µF

1µF

16

3

17

4

18

5k

5k

5k

5k

5k

5k

5k

5k

5k

5k

C2-

C2+

C1-

C1+

T

A2

OUT

T

A2

IN

T

A3

OUT

T

A3

IN

T

A4

OUT

T

A4

IN

9R

A1

IN

10 R

A1

OUT

8R

A2

IN

11 R

A2

OUT

7R

A3

IN

12 R

A3

OUT

6R

A4

IN

13 R

A4

OUT

5R

A5

IN

1419R

A5

OUT

26

22

43

29

42

28

41

27

36

35

37

34

38

33

39

32

40

31

V-

V+

T

B2

OUT

T

B2

IN

400k

215T

A1

OUT

T

A1

IN

44

30

TB1OUT

T

B1

IN

T

B3

OUT

T

B3

IN

T

B4

OUT

T

B4

IN

R

B1

IN

R

B1

OUT

R

B2

IN

R

B2

OUT

R

B3

IN

R

B3

OUT

R

B4

IN

R

B4

OUT

R

B5

IN

R

B5

OUT

MAX249 FUNCTIONAL DESCRIPTION

10 RECEIVERS
5 A-SIDE RECEIVER
5 B-SIDE RECEIVER
8 TRANSMITTERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
NO CONTROL PINS

441234404142

43

5

21

24

26

25

27

28

22 2319

20

8

9

10

11

12

13

14

15

16

17

29

30

31

32

33

34

35

36

37

38

TA3IN

V

CC

R

A5

IN

MAX244

PLCC

TOP VIEW

T

A4

OUT

T

A3

OUT

T

A2

OUT

T

A1

OUT

T

B1

OUT

T

B2

OUT

T

B3

OUT

TB

4

OUT

R

B5

IN

GND

V+

C1+

C2+

C1-V-C2-

T

B3

IN

T

B4

IN

RB3IN

R

B2

IN

R

B1

IN

R

B1

OUT

R

B2

OUT

R

B3

OUT

R

B4

OUT

R

B5

OUT

T

B1

IN

T

B2

IN

T

A2

IN

T

A1

IN

R

A5

OUT

R

A4

OUT

R

A3

OUT

R

A2

OUT

R

A1

OUT

R

A1

IN

R

A2

IN

7

39

RB4IN

R

A3

IN

6

18

R

A4

INT

A4

IN

+5V

+5V

+5V

+5V

Figure 20. MAX244 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

30 ______________________________________________________________________________________

400k

V

CC

400k

400k

GND

+5V

+5V

+5V

+5V

+5V

40

17

1µF

3

18

4

19

5

5k

5k

5k

5k

5k

5k

5k

5k

5k

5k

T

A2

OUT

T

A2

IN

T

A3

OUT

T

A3

IN

T

A4

OUT

T

A4

IN

1

11 RA1IN

10 R

A1

OUT

12 R

A2

IN

9R

A2

OUT

13 R

A3

IN

8R

A3

OUT

14 R

A4

IN

7R

A4

OUT

15 R

A5

IN

620R

A5

OUT

23

37

22

36

21

35

29

30

28

31

27

32

26

33

25

34

TB2OUT

T

B2

IN

T

B3

OUT

T

B3

IN

T

B4

OUT

T

B4

IN

RB1IN

R

B1

OUT

R

B2

IN

R

B2

OUT

R

B3

IN

R

B3

OUT

R

B4

IN

R

B4

OUT

R

B5

IN

R

B5

OUT

+5V

+5V

400k

162T

A1

OUT

T

A1

IN

24

38

TB1OUT

T

B1

IN

+5V

+5V

40 V

CC

ENT

T

B1

IN

T

B2

IN

T

B3

IN

T

B4

IN

R

B5

OUT

R

B4

OUT

R

B3

OUT

R

B2

OUT

R

B1

OUT

R

B1

IN

R

B2

IN

R

B3

IN

R

B4

IN

R

B5

IN

T

B1

OUT

T

B2

OUT

T

B3

OUT

T

B4

OUT

39

38

37

36

35

34

33

32

31

1

2

3

4

5

6

7

8

9

10

ENR

T

A1

IN

T

A2

IN

T

A3

IN

T

A4

IN

R

A5

OUT

R

A4

OUT

R

A3

OUT

R

A2

OUT

R

A1

OUT

R

A1

IN

R

A2

IN

R

A3

IN

R

A4

IN

R

A5

IN

T

A1

OUT

T

A2

OUT

T

A3

OUT

T

A4

OUT

GND

TOP VIEW

MAX245

30

29

28

27

26

25

24

23

22

21

11

12

13

14

15

16

17

18

19

DIP

20

MAX245 FUNCTIONAL DESCRIPTION

10 RECEIVERS
5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE)
5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)
8 TRANSMITTTERS
4 A-SIDE TRANSMITTERS
2 CONTROL PINS
1 RECEIVER ENABLE (ENR)
1 TRANSMITTER ENABLE (ENT)

39

ENR

ENT

Figure 21. MAX245 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 31

400k

V

CC

400k

GND

+5V

+5V

+5V

+5V

+5V

40

16

1µF

2

18

4

T

A1

OUT

T

A1

IN

T

A3

OUT

T

A3

IN

20

24

38

22

36

1

39

T

B1

OUT

T

B1

IN

T

B3

OUT

T

B3

IN

400k

+5V

173T

A2

OUT

T

A2

IN

+5V

23

37

TB2OUT

T

B2

IN

400k

+5V

19

5

T

A4

OUT

T

A4

IN

+5V

21

35

TB4OUT

T

B4

IN

5k

5k

5k

5k

5k

5k

5k

5k

5k

5k

11 R

A1

IN

10 R

A1

OUT

12 R

A2

IN

9R

A2

OUT

13 R

A3

IN

8R

A3

OUT

14 R

A4

IN

7R

A4

OUT

15 R

A5

IN

6R

A5

OUT

29

30

28

31

27

32

26

33

25

34

RB1IN

R

B1

OUT

R

B2

IN

R

B2

OUT

R

B3

IN

R

B3

OUT

R

B4

IN

R

B4

OUT

R

B5

IN

R

B5

OUT

40 V

CC

ENB

T

B1

IN

T

B2

IN

T

B3

IN

T

B4

IN

R

B5

OUT

R

B4

OUT

R

B3

OUT

R

B2

OUT

R

B1

OUT

R

B1

IN

R

B2

IN

R

B3

IN

R

B4

IN

R

B5

IN

T

B1

OUT

T

B2

OUT

T

B3

OUT

T

B4

OUT

39

38

37

36

35

34

33

32

31

1

2

3

4

5

6

7

8

9

10

ENA

T

A1

IN

T

A2

IN

T

A3

IN

T

A4

IN

R

A5

OUT

R

A4

OUT

R

A3

OUT

R

A2

OUT

R

A1

OUT

R

A1

IN

R

A2

IN

R

A3

IN

R

A4

IN

R

A5

IN

T

A1

OUT

T

A2

OUT

T

A3

OUT

T

A4

OUT

GND

TOP VIEW

MAX246

30

29

28

27

26

25

24

23

22

21

11

12

13

14

15

16

17

18

19

DIP

20

MAX246 FUNCTIONAL DESCRIPTION

10 RECEIVERS
5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE)
5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)
8 TRANSMITTERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
2 CONTROL PINS
ENABLE A-SIDE (ENA)
ENABLE B-SIDE (ENB)

ENA

ENB

Figure 22. MAX246 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

32 ______________________________________________________________________________________

400k

V

CC

400k

GND

+5V

+5V

+5V

+5V

+5V

1

40

16

1µF

2

18

4

5k

5k

5k

5k

5k

5k

5k

5k

ENTA

T

A1

OUT

T

A1

IN

T

A3

OUT

T

A3

IN

6RB5OUT

12 R

A1

IN

10 R

A1

OUT

13 R

A2

IN

9R

A2

OUT

14 R

A3

IN

8R

A3

OUT

15 R

A4

IN

720R

A4

OUT

11

39

24

38

22

36

29

31

28

32

27

33

26

34

30ENRA

ENTB

T

B1

OUT

T

B1

IN

T

B3

OUT

T

B3

IN

R

B1

IN

5k

25

RB5IN

R

B1

OUT

R

B2

IN

R

B2

OUT

R

B3

IN

R

B3

OUT

R

B4

IN

R

B4

OUT

ENRB

400k

+5V

173T

A2

OUT

T

A2

IN

+5V

23

37

TB2OUT

T

B2

IN

400k

+5V

195T

A4

OUT

T

A4

IN

+5V

21

35

TB4OUT

T

B4

IN

40

V

CC

ENTB

T

B1

IN

T

B2

IN

T

B3

IN

T

B4

IN

R

B4

OUT

R

B3

OUT

R

B2

OUT

R

B1

OUT

R

B1

IN

R

B2

IN

R

B3

IN

R

B4

IN

R

B5

IN

T

B1

OUT

T

B2

OUT

T

B3

OUT

T

B4

OUT

39

38

37

36

35

34

33

32

31

1

2

3

4

5

6

7

8

9

10

ENTA

T

A1

IN

T

A2

IN

T

A3

IN

T

A4

IN

R

B5

OUT

R

A4

OUT

R

A3

OUT

R

A2

OUT

R

A1

OUT

R

A1

IN

R

A2

IN

R

A3

IN

R

A4

IN

T

A1

OUT

T

A2

OUT

T

A3

OUT

T

A4

OUT

GND

TOP VIEW

MAX247

30

29

28

27

26

25

24

23

22

21

11

12

13

14

15

16

17

18

19

DIP

20

ENRA ENRB

MAX247 FUNCTIONAL DESCRIPTION

9 RECEIVERS
4 A-SIDE RECEIVERS
5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)
8 TRANSMITTERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
4 CONTROL PINS
ENABLE RECEIVER A-SIDE (ENRA)
ENABLE RECEIVER B-SIDE (ENRB)
ENABLE RECEIVER A-SIDE (ENTA)
ENABLE RECEIVERr B-SIDE (ENTB)

Figure 23. MAX247 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 33

400k

+10V TO -10V VOLTAGE INVERTER

+5V TO +10V VOLTAGE DOUBLER

V

CC

400k

GND

+5V

+5V

+5V

+5V

+5V

18

25

24

23

21

20

1

1µF

1µF

1µF

1µF

1µF

14

3

16

5k

5k

5k

5k

5k

5k

5k

5k

ENTA

C2-

C2+

C1-

C1+

T

A1

OUT

T

A1

IN

T

A3

OUT

T

A3

IN

8R

A1

IN

10 R

A1

OUT

7R

A2

IN

11 R

A2

OUT

6R

A3

IN

12 R

A3

OUT

5R

A4

IN

1319R

A4

OUT

9

27

26

22

44

31

42

29

37

35

38

34

39

33

40

32

36ENRA

ENTB

V-

V+

T

B1

OUT

T

B1

IN

T

B3

OUT

T

B3

IN

R

B1

IN

R

B1

OUT

R

B2

IN

R

B2

OUT

R

B3

IN

R

B3

OUT

R

B4

IN

R

B4

OUT

ENRB

400k

+5V

215T

A2

OUT

T

A2

IN

+5V

43

30

TB2OUT

T

B2

IN

400k

+5V

417T

A4

OUT

T

A4

IN

+5V

41

28

TB4OUT

T

B4

IN

441234404142

43

5

21

24

26

25

27

28

22 2319

20

8

9

10

11

12

13

14

15

16

17

29

30

31

32

33

34

35

36

37

38

TA4IN

V

CC

R

A4

IN

MAX248

PLCC

TOP VIEW

T

A4

OUT

T

A3

OUT

T

A2

OUT

T

A1

OUT

T

B1

OUT

T

B2

OUT

T

B3

OUT

T

A4

OUT

R

B4

IN

GND

V+

C1+

C2+

C1-V-C2-

T

B4

IN

ENTB

RB2IN

R

B1

IN

R

B1

OUT

R

B2

OUT

R

B3

OUT

R

B4

OUT

T

B1

IN

T

B2

IN

T

B3

IN

T

A3

IN

T

A2

IN

T

A1

IN

R

A4

OUT

R

A3

OUT

R

A2

OUT

R

A1

OUT

ENRA

R

A1

IN

7

39

RB3IN

R

A2

IN

6

18

R

A3

IN

ENRB

ENTA

MAX248 FUNCTIONAL DESCRIPTION

8 RECEIVERS
4 A-SIDE RECEIVERS
4 B-SIDE RECEIVERS
8 TRANSMITTERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
4 CONTROL PINS
ENABLE RECEIVER A-SIDE (ENRA)
ENABLE RECEIVER B-SIDE (ENRB)
ENABLE RECEIVER A-SIDE (ENTA)
ENABLE RECEIVER B-SIDE (ENTB

)

Figure 24. MAX248 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

34 ______________________________________________________________________________________

400k

+10V TO -10V VOLTAGE INVERTER

+5V TO +10V VOLTAGE DOUBLER

V

CC

400k

400k

GND

+5V

+5V

+5V

+5V

+5V

+5V

+5V

18

25

24

23

21

20

1

1µF

1µF

1µF

1µF

15

2

16

3

17

5k

5k

5k

5k

5k

5k

5k

5k

5k

5k

ENTA

C2-

C2+

C1-

C1+

T

A1

OUT

T

A1

IN

T

A2

OUT

T

A2

IN

T

A3

OUT

T

A3

IN

8R

A1

IN

10 R

A1

OUT

7R

A2

IN

11 R

A2

OUT

6R

A3

IN

12 R

A3

OUT

5R

A4

IN

13 R

A4

OUT

4R

A5

IN

1419R

A5

OUT

9

27

26

22

44

30

43

29

42

28

37

35

38

34

39

33

40

32

41

31

36ENRA

ENTB

V-

V+

T

B1

OUT

T

B1

IN

T

B2

OUT

T

B2

IN

T

B3

OUT

T

B3

IN

R

B1

IN

R

B1

OUT

R

B2

IN

R

B2

OUT

R

B3

IN

R

B3

OUT

R

B4

IN

R

B4

OUT

R

B5

IN

R

B5

OUT

ENRB

441234404142

43

5

21

24

26

25

27

28

22 2319

20

8

9

10

11

12

13

14

15

16

17

29

30

31

32

33

34

35

36

37

38

V

CC

R

A4

IN

R

A5

IN

MAX249

PLCC

TOP VIEW

T

A3

OUT

T

A2

OUT

T

A1

OUT

T

B1

OUT

T

B2

OUT

T

B3

OUT

R

B4

IN

R

B5

IN

GND

V+

C1+

C2+

C1-V-C2-

T

B3

IN

ENTB

RB2IN

R

B1

IN

R

B1

OUT

MAX249 FUNCTIONAL DESCRIPTION

10 RECEIVERS
5 A-SIDE RECEIVERS
5 B-SIDE RECEIVERS
6 TRANSMITTERS
3 A-SIDE TRANSMITTERS
3 B-SIDE TRANSMITTERS
4 CONTROL PINS
ENABLE RECEIVER A-SIDE (ENRA)
ENABLE RECEIVER B-SIDE (ENRB)
ENABLE RECEIVER A-SIDE (ENTA)
ENABLE RECEIVER B-SIDE (ENTB)

RB2OUT

R

B3

OUT

R

B4

OUT

R

B5

OUT

T

B1

IN

T

B2

INTA3IN

T

A2

IN

T

A1

IN

R

A4

OUT

R

A5

OUT

R

A3

OUT

R

A2

OUT

R

A1

OUT

ENRA

R

A1

IN

7

39

RB3IN

R

A2

IN

6

18

R

A3

IN

ENRB

ENTA

1µF

Figure 25. MAX249 Pin Configuration and Typical Operating Circuit

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

______________________________________________________________________________________ 35

___________________________________________Ordering Information (continued)

PART

MAX222CPN

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

18 Plastic DIP

MAX222CWN 0°C to +70°C 18 Wide SO

MAX222C/D 0°C to +70°C Dice*

MAX222EPN -40°C to +85°C 18 Plastic DIP

MAX222EWN -40°C to +85°C 18 Wide SO

MAX222EJN -40°C to +85°C 18 CERDIP

MAX222MJN -55°C to +125°C 18 CERDIP

MAX223CAI

0°C to +70°C 28 SSOP

MAX223CWI 0°C to +70°C 28 Wide SO

MAX223C/D 0°C to +70°C Dice*

MAX223EAI -40°C to +85°C 28 SSOP

MAX223EWI -40°C to +85°C 28 Wide SO

MAX225CWI

0°C to +70°C 28 Wide SO

MAX225EWI -40°C to +85°C 28 Wide SO

MAX230CPP

0°C to +70°C 20 Plastic DIP

MAX230CWP 0°C to +70°C 20 Wide SO

MAX230C/D 0°C to +70°C Dice*

MAX230EPP -40°C to +85°C 20 Plastic DIP

MAX230EWP -40°C to +85°C 20 Wide SO

MAX230EJP -40°C to +85°C 20 CERDIP

MAX230MJP -55°C to +125°C 20 CERDIP

MAX231CPD

0°C to +70°C 14 Plastic DIP

MAX231CWE 0°C to +70°C 16 Wide SO

MAX231CJD 0°C to +70°C 14 CERDIP

MAX231C/D 0°C to +70°C Dice*

MAX231EPD -40°C to +85°C 14 Plastic DIP

MAX231EWE -40°C to +85°C 16 Wide SO

MAX231EJD -40°C to +85°C 14 CERDIP

MAX231MJD -55°C to +125°C 14 CERDIP

MAX232CPE

0°C to +70°C 16 Plastic DIP

MAX232CSE 0°C to +70°C 16 Narrow SO

MAX232CWE 0°C to +70°C 16 Wide SO

MAX232C/D 0°C to +70°C Dice*

MAX232EPE -40°C to +85°C 16 Plastic DIP

MAX232ESE -40°C to +85°C 16 Narrow SO

MAX232EWE -40°C to +85°C 16 Wide SO

MAX232EJE -40°C to +85°C 16 CERDIP

MAX232MJE -55°C to +125°C 16 CERDIP

MAX232MLP -55°C to +125°C 20 LCC

MAX232ACPE

0°C to +70°C 16 Plastic DIP

MAX232ACSE 0°C to +70°C 16 Narrow SO

MAX232ACWE 0°C to +70°C 16 Wide SO

MAX232AC/D

MAX232AEPE -40°C to +85°C 16 Plastic DIP

MAX232AESE

0°C to +70°C Dice*

-40°C to +85°C 16 Narrow SO

MAX232AEWE -40°C to +85°C 16 Wide SO

MAX232AEJE -40°C to +85°C 16 CERDIP

MAX232AMJE -55°C to +125°C 16 CERDIP

MAX232AMLP -55°C to +125°C 20 LCC

MAX233CPP

0°C to +70°C 20 Plastic DIP

MAX233EPP -40°C to +85°C 20 Plastic DIP

MAX233ACPP

0°C to +70°C 20 Plastic DIP

MAX233ACWP 0°C to +70°C 20 Wide SO

MAX233AEPP -40°C to +85°C 20 Plastic DIP

MAX233AEWP -40°C to +85°C 20 Wide SO

MAX234CPE

0°C to +70°C 16 Plastic DIP

MAX234CWE 0°C to +70°C 16 Wide SO

MAX234C/D 0°C to +70°C Dice*

MAX234EPE -40°C to +85°C 16 Plastic DIP

MAX234EWE -40°C to +85°C 16 Wide SO

MAX234EJE -40°C to +85°C 16 CERDIP

MAX234MJE -55°C to +125°C 16 CERDIP

MAX235CPG

0°C to +70°C 24 Wide Plastic DIP

MAX235EPG -40°C to +85°C 24 Wide Plastic DIP

MAX235EDG -40°C to +85°C 24 Ceramic SB

MAX235MDG -55°C to +125°C 24 Ceramic SB

MAX236CNG

0°C to +70°C 24 Narrow Plastic DIP

MAX236CWG 0°C to +70°C 24 Wide SO

MAX236C/D 0°C to +70°C Dice*

MAX236ENG -40°C to +85°C 24 Narrow Plastic DIP

MAX236EWG -40°C to +85°C 24 Wide SO

MAX236ERG -40°C to +85°C 24 Narrow CERDIP

MAX236MRG -55°C to +125°C 24 Narrow CERDIP

MAX237CNG

0°C to +70°C 24 Narrow Plastic DIP

MAX237CWG 0°C to +70°C 24 Wide SO

MAX237C/D 0°C to +70°C Dice*

MAX237ENG -40°C to +85°C 24 Narrow Plastic DIP

MAX237EWG -40°C to +85°C 24 Wide SO

MAX237ERG -40°C to +85°C 24 Narrow CERDIP

MAX237MRG -55°C to +125°C 24 Narrow CERDIP

MAX238CNG

0°C to +70°C 24 Narrow Plastic DIP

MAX238CWG 0°C to +70°C 24 Wide SO

MAX238C/D 0°C to +70°C Dice*

MAX238ENG -40°C to +85°C 24 Narrow Plastic DIP

* Contact factory for dice specifications.

MAX220–MAX249

+5V-Powered, Multichannel RS-232
Drivers/Receivers

___________________________________________Ordering Information (continued)

* Contact factory for dice specifications.

18 CERDIP-55°C to +125°CMAX242MJN

18 CERDIP-40°C to +85°CMAX242EJN

18 Wide SO-40°C to +85°CMAX242EWN

18 Plastic DIP-40°C to +85°CMAX242EPN

Dice*0°C to +70°CMAX242C/D

18 Wide SO0°C to +70°CMAX242CWN

18 Plastic DIP0°C to +70°CMAX242CPN

20 SSOP0°C to +70°C

MAX242CAP

28 Wide SO-40°C to +85°CMAX241EWI

28 SSOP-40°C to +85°CMAX241EAI

Dice*0°C to +70°CMAX241C/D

28 Wide SO0°C to +70°CMAX241CWI

28 SSOP0°C to +70°C

MAX241CAI

Dice*0°C to +70°CMAX240C/D

44 Plastic FP0°C to +70°C

MAX240CMH

24 Narrow CERDIP-55°C to +125°CMAX239MRG

24 Narrow CERDIP-40°C to +85°CMAX239ERG

24 Wide SO-40°C to +85°CMAX239EWG

24 Narrow Plastic DIP-40°C to +85°CMAX239ENG

Dice*0°C to +70°CMAX239C/D

24 Wide SO0°C to +70°CMAX239CWG

24 Narrow Plastic DIP0°C to +70°C

MAX239CNG

24 Narrow CERDIP-55°C to +125°C

24 Wide SO

PIN-PACKAGETEMP. RANGE

-40°C to +85°C

MAX238MRG

24 Narrow CERDIP-40°C to +85°CMAX238ERG

MAX238EWG

PART

44 PLCC-40°C to +85°CMAX249EQH

44 PLCC0°C to +70°C

MAX249CQH

44 PLCC-40°C to +85°CMAX248EQH

Dice*0°C to +70°CMAX248C/D

44 PLCC0°C to +70°C

MAX248CQH

40 Plastic DIP-40°C to +85°CMAX247EPL

Dice*0°C to +70°CMAX247C/D

40 Plastic DIP0°C to +70°C

MAX247CPL

40 Plastic DIP-40°C to +85°CMAX246EPL

Dice*0°C to +70°CMAX246C/D

40 Plastic DIP0°C to +70°C

MAX246CPL

40 Plastic DIP-40°C to +85°CMAX245EPL

Dice*0°C to +70°CMAX245C/D

40 Plastic DIP0°C to +70°C

MAX245CPL

44 PLCC-40°C to +85°CMAX244EQH

Dice*0°C to +70°CMAX244C/D

44 PLCC0°C to +70°C

MAX244CQH

16 CERDIP-55°C to +125°CMAX243MJE

16 CERDIP-40°C to +85°CMAX243EJE

16 Wide SO-40°C to +85°CMAX243EWE

16 Narrow SO-40°C to +85°CMAX243ESE

16 Plastic DIP-40°C to +85°CMAX243EPE

Dice*0°C to +70°CMAX243C/D

16 Wide SO0°C to +70°C

16 Plastic DIP0°C to +70°C

MAX243CWE

16 Narrow SO0°C to +70°CMAX243CSE

MAX243CPE

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

36 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 [phone]

© 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.