MAXIM MAX3160E, MAX3161E, MAX3162E User Manual

General Description

The MAX3160E/MAX3161E/MAX3162E are programma­ble RS-232/RS-485/RS-422 multiprotocol transceivers.
The MAX3160E/MAX3161E are pin programmable as a
2Tx/2Rx RS-232 interface or a single RS-485/RS-422
transceiver. The MAX3162E is configured as a 2Tx/2Rx
RS-232 interface, and a single RS-485/RS-422 trans­ceiver simultaneously.

The MAX3160E/MAX3161E/MAX3162E feature enhanced
electrostatic discharge (ESD) protection. All of the trans­mitter outputs and receiver inputs are protected to ±15kV
using the Human Body Model.

All devices incorporate a proprietary low-dropout trans­mitter output stage, and an on-board dual charge pump
to allow RS-232- and RS-485-/RS-422-compliant perfor­mance from a +3V to +5.5V supply. The receivers feature
true fail-safe circuitry that guarantees a logic-high receiv­er output when the receiver inputs are open or shorted.
These devices also feature pin-selectable transmitter
slew rates for RS-232 and RS-485/RS-422 modes. Slew­rate limiting minimizes EMI and reduces reflections
caused by improperly terminated cables, allowing error­free data transmission up to 250kbps. Disabling slew-rate
limiting allows these devices to transmit at data rates up
to 10Mbps in RS-485/RS-422 mode and up to 1Mbps in
RS-232 mode. The MAX3160E/MAX3161E/MAX3162E
feature a 10nA shutdown mode, short-circuit limiting, and
thermal shutdown circuitry to protect against excessive
power dissipation.

The MAX3160E/MAX3162E offer a flow-through pin­out that facilitates board layout. The MAX3160E/
MAX3161E/MAX3162E are available in tiny SSOP pack­ages and operate over the commercial and extended
temperature ranges.

________________________Applications

Point-of-Sales Equipment Peripherals

Industrial Controls Networking

RS-232 to RS-485 Security Systems
Interface Converters

Features

♦ Single Supply Operation from +3V to +5.5V
♦ ESD Protection

±15kV Human Body Model

♦ Pin-Selectable as 2Tx/2Rx RS-232 or Single

RS-485/RS-422 (MAX3160E/MAX3161E)

♦ 2Tx/2Rx RS-232 and Single RS-485/RS-422

(MAX3162E)

♦ Pin-Selectable RS-232/RS-485 Transmitter Slew

Rates Reduce EMI

♦ 10Mbps RS-485 and 1Mbps RS-232 Data Rates
♦ Pin-Selectable Half-Duplex or Full-Duplex

RS-485/RS-422 Operation (MAX3160E/MAX3161E)

♦ RS-485/RS-422 True Fail-Safe Receivers
♦ 10nA Shutdown Supply Current
♦ 1/8-Unit Load Allows up to 256 Transceivers on

the Bus

MAX3160E/MAX3161E/MAX3162E

±15kV ESD-Protected, +3.0V to +5.5V, 10nA,

RS-232/RS-485/RS-422 Multiprotocol Transceivers

________________________________________________________________ Maxim Integrated Products 1

19-3580; Rev 0; 2/05

EVALUATION KIT

AVAILABLE

Typical Operating Circuit

Pin Configurations appear at end of data sheet.

Selector Guide appears at end of data sheet.

TX

V

CC

DI/T1IN

Z(B)/T1OUT

R1OUT

B/R1IN

GND FAST HDPLX SHDN

Y(A)/T2OUT

A/R2IN

CTS

13

10

DE485/T2IN

RTS

11

15

6

RO/R2OUT

RX

12

8

13

7

14

910

12

16

5

11

RJ45

DB9

SHDN

µP

SPI

MAX3100

RS-485/RS232

2

MAX3160E

+3V TO +5.5V

4

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

PART

TEMP RANGE

PIN-

PACKAGE

CODE

MAX3160ECAP

20 SSOP A20-2

MAX3160EEAP

20 SSOP A20-2

MAX3161ECAG

24 SSOP A24-3

MAX3161EEAG

24 SSOP A24-3

MAX3162ECAI

28 SSOP A28-1

MAX3162EEAI

28 SSOP A28-1

PACKAGE

0°C to +70°C

-40°C to +85°C
0°C to +70°C

-40°C to +85°C
0°C to +70°C

-40°C to +85°C

MAX3160E/MAX3161E/MAX3162E

±15kV ESD-Protected, +3.0V to +5.5V, 10nA,
RS-232/RS-485/RS-422 Multiprotocol Transceivers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%;
T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +3.3V and TA= +25°C.) (Note 2)

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.

Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.

V

CC

to GND..............................................................-0.3V to +6V

V+ to GND ................................................................-0.3V to +7V

V- to GND. ................................................................-7V to +0.3V

V+ - V- (Note 1)....................................................................+13V

Input Voltages

T1IN, T2IN, DI, DE485,

RE485, TE232, RE232, SHDN,

FAST, HDPLX, RS485/RS232 to GND. .................-0.3V to +6V

A, B, R1IN, R2IN to GND .................................................±25V

Output Voltages

T1OUT, T2OUT, Y, Z to GND (V

CC

= 0 or

SHDN = GND) ..............................................................±13.2V

T1OUT, T2OUT to GND (V

CC

= 5.5V and

SHDN = V

CC

) .....................................................-13.2V to +9V

R2OUT, R1OUT, RO to GND..................-0.3V to (V

CC

+ 0.3V)

Output Short-Circuit Duration

T1OUT, T2OUT, Y, Z ..............................................Continuous

Continuous Power Dissipation (T

A

= +70°C)

20-Pin SSOP (derate 8.0mW/°C above +70°C) ...........640mW

24-Pin SSOP (derate 8.0mW/°C above +70°C) ...........640mW

28-Pin SSOP (derate 9.1mW/°C above +70°C) ...........727mW

Operating Temperature Ranges

MAX316_CA_......................................................0°C to +70°C

MAX316_EA_ ...................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature......................................................+150°C

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

PARAMETER

CONDITIONS

UNITS

DC CHARACTERISTICS

MAX3160E/MAX3161E, no load,
RS-485/ RS-232 = GND

1.2 2.8

MAX3160E/MAX3161E, no load,
RS-485/ RS-232 = V

CC

2.5 5.5

VCC Standby Current I

CC

MAX3162E, no load 3 6

mA

VCC Shutdown Current I

SHDN

SHDN = GND, receiver inputs open or
grounded

1µA

TRANSMITTER AND LOGIC INPUTS (DI, T1IN, T2IN, DE485, RRRREEEE444488885555, TE232, RRRREEEE222233332222, FAST, HDPLX, SHDN, RS-485/ RRRRSSSS----222233332222 )

Logic-Input Low V

IL

0.8 V

VCC = +3.3V 2.0

Logic-Input High V

IH

VCC = +5V 2.4

V

Logic-Input Leakage Current I

INL

±1µA

Transmitter Logic Hysteresis V

HYS

0.5 V

RS-232 AND RS-485/RS-422 RECEIVER OUTPUTS (R1OUT, R2OUT, RO)

Receiver Output-Voltage Low V

OL

I

OUT

= 2.5mA 0.4 V

Receiver Output-Voltage High V

OH

I

OUT

= -1.5mA V

CC

- 0.6 V

Receiver Output Short-Circuit
Current

I

OSR

0 ≤ VO ≤ V

CC

±85 mA

Receiver Output Leakage
Current

I

OZR

Receivers disabled

±1µA

SYMBOL

MIN TYP MAX

0.01

±0.01

±20

±0.05

MAX3160E/MAX3161E/MAX3162E

±15kV ESD-Protected, +3.0V to +5.5V, 10nA,

RS-232/RS-485/RS-422 Multiprotocol Transceivers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%;
T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +3.3V and TA= +25°C.) (Note 2)

PARAMETER

CONDITIONS

UNITS

RS-232 RECEIVER INPUTS (R1IN, R2IN)

Input Voltage Range -25

V

Logic-Input Low 0.8

V

CC

= +3.3V 2.0

Logic-input High

V

CC

= +5V 2.4

V

Input Hysteresis 0.5 V

VCC = +3.0V to 5.5V 3 5 7

Input Resistance

V

CC

= 0 6 11 16

kΩ

RS-485/RS-422 RECEIVER INPUTS (Note 3)

MAX3160E 48

Input Resistance R

IN

-7V < VCM < +12V

MAX3161E/
MAX3162E

96

kΩ

MAX3160E

V

CM

= -7V

Input Current I

IN

MAX3161E/MAX3162E

V

CM

= -7V

mA

Input Differential Threshold V

TH

-7V ≤ VCM ≤ +12V

-50 mV

Input Hysteresis ∆V

TH

30 mV

RS-232 TRANSMITTER OUTPUTS (T1OUT, T2OUT)

Output Voltage Swing

Both transmitter outputs loaded with 3kΩ
to GND

±5

V

Output Resistance VCC = V+ = V- = 0, T_OUT = ±2V

Ω

Output Short-Circuit Current I

SC

T_OUT = GND

±60 mA

MAX3160E

MAX3161E ±25

Output Leakage Current I

O

V

OUT

= ±9V

TE232 = GND or SHDN =
GND

MAX3162E ±25

µA

RS-485/RS-422 TRANSMITTER OUTPUTS (Y, Z)

R = 27Ω
(RS-485)

1.5

Differential Output Voltage V

OD

Figure 1

R = 50Ω
(RS-422)

2

V

Change in Magnitude of
Differential Output Voltage for
Complementary Output States

R = 27Ω or 50Ω, Figure 1 0.2 V

Common-Mode Output Voltage

V

OC

R = 27Ω or 50Ω, Figure 1 3 V

Change in Magnitude of
Common-Mode Output Voltage
for Complementary Output
States

R = 27Ω or 50Ω, Figure 1 0.2 V

SYMBOL

VCM = +12V 0.25

VCM = +12V 0.125

MIN TYP MAX

-200

+25

-0.15

-0.075

|∆VOD|

|∆VOC|

300 10M

±5.4

±30

±125

MAX3160E/MAX3161E/MAX3162E

±15kV ESD-Protected, +3.0V to +5.5V, 10nA,
RS-232/RS-485/RS-422 Multiprotocol Transceivers

4 _______________________________________________________________________________________

PARAMETER

CONDITIONS

UNITS

Output Short-Circuit Current I

SC

VY or VZ = -7V to +12V

mA

MAX3160E

MAX3161E ±25

Output Leakage Current

I

O

VY or VZ = -7V or +12V,
DE485 = GND or SHDN =
GND

MAX3162E ±25

µA

RS-232 TRANSMITTER TIMING CHARACTERISTICS (SLOW MODE, FAST = GND, 250kbps, one transmitter switching)

Maximum Data Rate RL = 3kΩ, CL = 1000pF

kbps

Transmitter Skew

RL = 3kΩ, CL = 150pF, Figure 6 25 ns

CL = 150pF
to 1000pF

630

Transition-Region Slew Rate

V

CC

= +3.3V, TA = +25°C,

R

L

= 3kΩ to 7kΩ,

measured from +3.0V to

-3.0V or -3.0V to +3.0V

C

L

= 150pF

to 2500pF

430

V/µs

RS-232 TRANSMITTER TIMING CHARACTERISTICS (FAST MODE, FAST = VCC, 1Mbps, one transmitter switching)

VCC = +3V to +4.5V, RL = 3kΩ, CL = 250pF 1

Maximum Data Rate

V

CC

= +4.5V to +5.5V, RL = 3kΩ,

C

L

= 1000pF

1

Mbps

Transmitter Skew

RL = 3kΩ, CL = 150pF, Figure 6 10 ns

13 150

Transition-Region Slew Rate

V

CC

= +3.3V, TA = +25°C, R

L

= 3kΩ to 7kΩ, CL = 150pF to
1000pF, measured from +3.0V
to -3.0V or -3.0V to +3.0V

MAX3161E

24 150

V/µs

RS-232 RECEIVER TIMING CHARACTERISTICS

Receiver Propagation Delay

R_IN to R_OUT, CL = 15pF, Figure 5

µs

Receiver Output Enable Time

CL = 50pF, Figures 2, 10, MAX3162E

ns

Receiver Output Disable Time

CL = 15pF, Figures 2, 10, MAX3162E

ns

Receiver Skew

CL = 50pF, Figure 5

ns

RS-485/RS-422 DRIVER TIMING CHARACTERISTICS (SLOW MODE, FAST = GND, 250kbps)

Differential Driver Propagation
Delay

t

DPHL

,

t

DPLH

R

DIFF

= 54Ω, CL = 50pF, Figures 3, 7

800 ns

Differential Driver Rise and Fall
Time

t

DR,

t

DF

R

DIFF

= 54Ω, CL = 50pF, Figures 3, 7

800 ns

Differential Driver Propagation
Delay Skew

R

DIFF

= 54Ω, CL = 50pF, Figures 3, 7 200 ns

Driver Output Enable Time

CL = 50pF, Figures 4, 8

900 ns

Driver Output Disable Time

CL = 50pF, Figures 4, 8

400 ns

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%;
T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +3.3V and TA= +25°C.) (Note 2)

SYMBOL

t

TSKEW

MIN TYP MAX

±250

±125

250

t

TSKEW

t

PHL,tPLH

t

RZL,tRZH

t

RLZ,tRHZ

t

RSKEW

t

DSKEW

t

, t

DZH

t

, t

DLZ

DZL

DHZ

MAX3160E

MAX3162E

200 400

200 400

0.15

200

200

100

400

200

MAX3160E/MAX3161E/MAX3162E

±15kV ESD-Protected, +3.0V to +5.5V, 10nA,

RS-232/RS-485/RS-422 Multiprotocol Transceivers

_______________________________________________________________________________________ 5

PARAMETER

CONDITIONS

UNITS

RS-485/RS-422 DRIVER TIMING CHARACTERISTICS FAST MODE, FAST = VCC, 10Mbps)

Differential Driver Propagation
Delay

t

DPHL,

t

DPLH

R

DIFF

= 54Ω, CL = 50pF, Figures 3, 7 60 120 ns

Differential Driver Rise and Fall
Times

R

DIFF

= 54Ω, CL = 50pF, Figures 3, 7 10 25 ns

Differential Driver Propagation
Delay Skew

R

DIFF

= 54Ω, CL = 50pF, Figures 3, 7 10 ns

Driver Output Enable Time

CL = 50pF, Figures 4, 8

900 ns

Driver Output Disable Time

CL = 50pF, Figures 4, 8

400 ns

RS-485/RS-422 RECEIVER TIMING CHARACTERISTICS

Receiver Propagation Delay

t

RPLH

,

t

RPHL

CL = 15pF, Figures 9, 11 80 150 ns

Receiver Propagation Delay
Skew

CL = 15pF, Figures 9, 11 1 10 ns

Receiver Output Enable Time

MAX3162E, CL = 50pF, Figures 2, 10

ns

Receiver Output Disable Time

MAX3162E, CL = 15pF, Figures 2, 10

ns

ESD PROTECTION

R_IN, T_OUT, A, B, Y, Z Human Body Model

kV

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%;
T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +3.3V and TA= +25°C.) (Note 2)

Typical Operating Characteristics

(VCC= +3.3V, 250kbps data rate, C

BYPASS

, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to

ground, TA= +25°C, unless otherwise noted.)

-10.00

-5.00

-7.50

-2.50

5.00

7.50

2.50

0

10.00

0 1000 2000 3000 4000 5000

RS-232 TRANSMITTER OUTPUT VOLTAGE

vs. LOAD CAPACITANCE (FAST = GND)

MAX3160E toc01

LOAD CAPACITANCE (pF)

TRANSMITTER OUTPUT VOLTAGE (V)

-10.00

-5.00

-7.50

-2.50

5.00

7.50

2.50

0

10.00

0 500 1000 1500 2000 2500

RS-232 TRANSMITTER OUTPUT VOLTAGE

vs. LOAD CAPACITANCE (FAST = V

CC

)

MAX3160E toc02

LOAD CAPACITANCE (pF)

TRANSMITTER OUTPUT VOLTAGE (V)

DATA RATE = 1Mbps

0

4

2

8

6

10

12

16

14

18

0 1000 2000 3000 4000 5000

RS-232 TRANSMITTER SLEW RATE

vs. LOAD CAPACITANCE (FAST = GND)

MAX3160E toc03

LOAD CAPACITANCE (pF)

SLEW RATE (V/µs)

RISING

FALLING

Note 2: All currents into the device are positive. All currents out of the device are negative.
Note 3: Applies to A, B for MAX3162E and MAX3160E/MAX3161E with HDPLX = GND, or Y, Z for MAX3160E/MAX3161E with

HDPLX = V

CC.

SYMBOL

tDR, t

DF

t

DSKEW

t

DZH,tDZL

t

DHZ,tDLZ

t

RSKEW

t

, t

RZL

RZH

t

, t

RLZ

RHZ

MIN TYP MAX

400

200

100
100

±15

MAX3160E/MAX3161E/MAX3162E

±15kV ESD-Protected, +3.0V to +5.5V, 10nA,
RS-232/RS-485/RS-422 Multiprotocol Transceivers

6 _______________________________________________________________________________________

0

50

150

100

200

250

-40 10-15 35 60 85

SHUTDOWN CURRENT

vs. TEMPERATURE

MAX3160E toc07

TEMPERATURE (°C)

SHUTDOWN CURRENT (nA)

0

40

20

80

60

120

100

140

0462 8 10 12

RS-485/RS-422 OUTPUT CURRENT

vs. DRIVER-OUTPUT LOW VOLTAGE

MAX3160E toc08

OUTPUT LOW VOLTAGE (V)

OUTPUT CURRENT (mA)

0

40

20

80

60

120

100

140

-7 -3 -1-5 135

RS-485/RS-422 OUTPUT CURRENT

vs. DRIVER-OUTPUT LOW VOLTAGE

MAX3160E toc09

OUTPUT LOW VOLTAGE (V)

OUTPUT CURRENT (mA)

0

20

10

40

30

60

50

70

90

80

100

0 1.0 1.50.5 2.0 2.5 3.0 3.5 4.0

RS-485/RS-422 DRIVER OUTPUT CURRENT

vs. DIFFERENTIAL OUTPUT VOLTAGE

MAX3160E toc10

OUTPUT LOW VOLTAGE (V)

OUTPUT CURRENT (mA)

2.0

2.3

2.2

2.1

2.4

2.5

2.6

2.7

2.8

2.9

3.0

-40 10-15 35 60 85

RS-485/RS-422 DRIVER DIFFERENTIAL

OUTPUT vs. TEMPERATURE

MAX3160E toc11

TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

R

DIFF

= 100Ω

FIGURE 1

0

10

5

20

15

25

30

0 1.5 2.00.5 1.0 2.5 3.0 3.5

RECEIVER OUTPUT CURRENT vs. RECEIVER-

OUTPUT LOW VOLTAGE

MAX3160E toc12

OUTPUT LOW VOLTAGE (V)

OUTPUT CURRENT (mA)

Typical Operating Characteristics (continued)

(VCC= +3.3V, 250kbps data rate, C

BYPASS

, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to

ground, TA= +25°C, unless otherwise noted.)

0

20

10

50

40

30

60

70

100

90

80

110

0 400 800 1200 1600 2000

RS-232 TRANSMITTER SLEW RATE

vs. LOAD CAPACITANCE (FAST = V

CC

)

MAX3160E toc04

LOAD CAPACITANCE (pF)

SLEW RATE (V/µs)

RISING

FALLING

0

30

20

10

40

50

60

0 20001000 3000 4000 5000

OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE WHEN

TRANSMITTING DATA (RS-232 MODE)

MAX3160E to05

LOAD CAPACITANCE (pF)

SUPPLY CURRENT (mA)

DATA RATE =

1Mbps

DATA RATE = 250kbps

DATA RATE = 20kbps

0

1.0

0.5

2.0

1.5

2.5

3.0

-40 10-15 35 60 85

MAX3160E/MAX3161E

NO-LOAD SUPPLY CURRENT

vs. TEMPERATURE

MAX3160E toc06

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

RS-485 MODE

RS-232 MODE

MAX3160E/MAX3161E/MAX3162E

±15kV ESD-Protected, +3.0V to +5.5V, 10nA,

RS-232/RS-485/RS-422 Multiprotocol Transceivers

_______________________________________________________________________________________ 7

0

30

20

10

40

50

60

70

80

90

100

-40 10-15 35 60 85

RS-485/RS-422 RECEIVER PROPAGATION

DELAY vs. TEMPERATURE

MAX3160E toc14

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

RISING

FALLING

20

30

25

40

35

45

50

-40 10-15 35 60 85

RS-485/RS-422 DRIVER PROPAGATION DELAY

vs. TEMPERATURE (FAST = V

CC

)

MAX3160E toc15

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

CL = 50pF
R

DIFF

= 54Ω

DATA RATE = 10Mbps

FALLING

RISING

100

200

150

300

250

350

400

-40 10-15 35 60 85

RS-485/RS-422 DRIVER PROPAGATION DELAY

vs. TEMPERATURE (FAST = GND)

MAX3160E toc16

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

CL = 50pF
R

DIFF

= 54Ω

DATA RATE = 250kbps

FALLING

RISING

20ns/div

RS-485/RS-422 DRIVER PROPAGATION

(FAST = V

CC

, 10Mbps)

VY - V

Z

2V/div

DI
2V/div

MAX3160E toc17

CL = 50pF
R

DIFF

= 54

Ω

1.0µs/div

RS-485/RS-422 DRIVER PROPAGATION

(FAST = GND, 250kbps)

VY - V

Z

2V/div

DI
2V/div

MAX3160E toc18

CL = 50pF
R

DIFF

= 54

Ω

4ns/div

RS-485/RS-422 RECEIVER PROPAGATION

(FAST = V

CC

, 5Mbps)

VY - V

Z

2V/div

RO
2V/div

MAX3160E toc20

CL = 15pF

100ns/div

RS-485/RS-422 RECEIVER PROPAGATION

(FAST = V

CC

, 5Mbps)

VY - V

Z

2V/div

MAX3160E toc21

CL = 50pF
R

DIFF

= 54

Ω

DE485
2V/div

0

4

2

8

6

12

10

14

0 1.0 1.50.5 2.0 2.5 3.0 3.5

RECEIVER OUTPUT CURRENT

vs. RECEIVER-OUTPUT HIGH VOLTAGE

MAX3160E toc13

OUTPUT-HIGH VOLTAGE (V)

OUTPUT CURRENT (mA)

Typical Operating Characteristics (continued)

(VCC= +3.3V, 250kbps data rate, C

BYPASS

, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to

ground, TA= +25°C, unless otherwise noted.)

-1000

-800

-400

-600

0

200

-200

400

-20 -10 -5-15 0 5 101520

I-V OUTPUT IMPEDANCE CURVE

IN RS-232 SHUTDOWN MODE

MAX3160E toc19

OUTPUT VOLTAGE (V)

OUTPUT CURRENT (µA)

MAX3160E/MAX3161E/MAX3162E

±15kV ESD-Protected, +3.0V to +5.5V, 10nA,
RS-232/RS-485/RS-422 Multiprotocol Transceivers

8 _______________________________________________________________________________________

1.0µs/div

MAX3160E

RS-232 TRANSMITTER PROPAGATION

(FAST = GND, 250kbps)

T_OUT
5V/div

MAX3160E toc22

CL = 1000pF
R

L

= 7kΩ

DI
2V/div

1.0µs/div

MAX3160E

RS-232 TRANSMITTER PROPAGATION

(FAST = V

CC

, 250kbps)

T_OUT
5V/div

MAX3160E toc23

CL = 150pF
R

L

= 7kΩ

DI
2V/div

1.0µs/div

MAX3161E/MAX3162E

RS-232 TRANSMITTER PROPAGATION

(FAST = GND, 250kbps)

T_OUT
5V/div

MAX3160E toc24

CL = 1000pF
R

L

= 7kΩ

DI
2V/div

1.0µs/div

MAX3161E/MAX3162E

RS-232 TRANSMITTER PROPAGATION

(FAST = V

CC

, 250kbps)

T_OUT
5V/div

MAX3160E toc25

CL = 150pF
R

L

= 7kΩ

DI
2V/div

-10.00

-5.00

-7.50

0

-2.50

2.50

5.00

7.50

10.00

2.0 3.0 3.52.5 4.0 4.5 5.0 5.5 6.0

TRANSMITTER OUTPUT VOLTAGE

vs. SUPPLY VOLTAGE (FAST = GND)

MAX3160E toc26

SUPPLY VOLTAGE (V)

TRANSMITTER OUTPUT VOLTAGE (V)

INPUTS AT VCC AND GND
2 TRANSMITTERS LOADED WITH 3kΩ

0

2

4

6

8

10

12

2.0 3.02.5 3.5 4.0 4.5 5.0 5.5 6.0

SUPPLY CURRENT vs. SUPPLY VOLTAGE

WITH RS-232 RUNNING (FAST = GND)

MAX3160E toc27

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

CL = 50pF
R

L

= 3kΩ

1 TRANSMITTER AT 250kbps

Typical Operating Characteristics (continued)

(VCC= +3.3V, 250kbps data rate, C

BYPASS

, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to

ground, TA= +25°C, unless otherwise noted.)