MAXIM MAX3188E, MAX3189E User Manual

General Description

The MAX3188E/MAX3189E single RS-232 transmitters
in a SOT23-6 package are for space- and cost-con­strained applications requiring minimal RS-232 commu­nications. These devices consume only 150µA of
supply current from ±4.5V to ±6V supplies. They fea­ture a shutdown input that reduces current consump­tion to only 1µA and forces the transmitter output into a
high-impedance state. RS-232 data transmission is guar­anteed up to 250kbps with the MAX3188E and up to
1Mbps with the MAX3189E.

The MAX3188E/MAX3189E are EIA/TIA-232 transmitters
that convert CMOS/TTL logic levels to RS-232-compliant
signals. The transmitter output is protected to ±15kV
using the IEC 1000-4-2 Air-Gap Discharge method, to
±8kV using the IEC 1000-4-2 Contact Discharge
method, and to ±15kV per the Human Body Model,
ensuring strict compliance with international standards.
The MAX3188E/MAX3189E transmitters have a standard
inverting output.

Applications

Diagnostic Ports

Telecommunications

Networking Equipment

Set-Top Boxes

Digital Cameras

Hand-Held Equipment

Features

♦ Small 6-Pin SOT23 Package

♦ ESD-Protected RS-232 Output

±15kV per Human Body Model
±8kV per IEC 1000-4-2, Contact Discharge
±15kV per IEC 1000-4-2, Air-Gap Discharge

♦ 150µA Operating Supply Current

♦ Shutdown Reduces Supply Current to 1µA

♦ Guaranteed Data Rate

1Mbps (MAX3189E)
250kbps (MAX3188E)

♦ Three-State RS-232 Transmitter Output

♦ No External Components

MAX3188E/MAX3189E

±15kV ESD-Protected, 1Mbps, 1µA

RS-232 Transmitters in SOT23-6

________________________________________________________________ Maxim Integrated Products 1

Typical Operating Circuit

19-1604; Rev 1; 3/00

Pin Configuration

Ordering Information

AAHE

AAHD

TOP

MARK

6 SOT23-6

6 SOT23-6

PIN-

PACKAGE

TEMP. RANGE

-40°C to +85°C

-40°C to +85°C

MAX3189EEUT-T

MAX3188EEUT-T

PART

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.

1

SHDN

6

V

CC

C

BYPASS1

0.1µF

TIN

3

CAPACITORS MAY BE
POLARIZED OR UNPOLARIZED.

MAX3188E
MAX3189E

GND

2

V

TOUT

TOP VIEW

16V

5

EE

4

C

BYPASS2

0.1µF

-5.4V+5.4V

SHDN

GND

2

34

CC

MAX3188E
MAX3189E

SOT23-6

5 V

EE

TOUTTIN

MAX3188E/MAX3189E

±15kV ESD-Protected, 1Mbps, 1µA
RS-232 Transmitters in SOT23-6

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V

CC

= +4.5V to +6V, VEE= -4.5V to -6V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V

CC

= +5.4V, V

EE

= -5.4V,

and T

A

= +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: VCCand VEEcan have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.

V

CC

to GND (Note 1)................................................-0.3V to +7V

V

EE

to GND (Note 1).................................................+0.3V to -7V

V

CC

to VEE(Note 1) .............................................................+13V

TIN, SHDN to GND ...................................................-0.3V to +7V

TOUT to GND (SHDN = GND)..........................................±13.2V

TOUT to GND (SHDN = V

CC

) ................................................±7V

Output Short-Circuit Duration.....................................Continuous

Continuous Power Dissipation (T

A

= +70°C)

6-Pin SOT23 (derate 8.7mW/°C above +70°C)..........691mW

Operating Temperature Range ...........................-40°C to +85°C

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

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

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

MAX3188E

MAX3189E

MAX3188E

MAX3189E

MAX3188E

RL= 3kΩ to 7kΩ,
C

L

= 150pF to 1000pF,
measured from -3V
to +3V or +3V to -3V,
V

CC

= 5.4V, VEE=

-5.4V, TA= +25°C

|t

PHL

- t

PLH

|, Figure 1

RL= 3kΩ,
C

L

= 1000pF

VCC= VEE= 0, V

TOUT

= ±2V

VCC= 5.4V, VEE= -5.4V, RL= 3kΩ

V

SHDN

= 5V

V

SHDN

= 5V

V

SHDN

= 0

VCC= 4.5V, VEE= -4.5V, RL= 3kΩ

CONDITIONS

24 150

V/µs

630

Transition-Region Slew Rate

25

MAX3189E

ns

100

t

TS

Transmitter Skew

1

Mbps

0.25

Maximum Data Rate

µA

±25

I

TOUT

Output Leakage Current

mA

±35 ±60

Output Short-Circuit Current

Ω

300

R

TOUT

Output Resistance

±5

V

±3.7

V

TOUT

Output Voltage Swing

V

-6 -4.5

V

EE

Negative Supply Voltage

V

4.5 6

V

CC

Positive Supply Voltage

mV

100

TIN Input Hysteresis

µA

±0.01 ±1

Input Leakage

V

2.0

V

IH

Input Logic Threshold High

V

0.8

V

IL

Input Logic Threshold Low

µA

170

I

CC

Positive Supply Current

µA

45

I

EE

Negative Supply Current

µA

0.2 1

Shutdown Supply Current

UNITSMIN TYP MAXSYMBOLPARAMETER

µs

2

t

EN

Transmitter Enable Time

V

OUT

= ±12V; VCC= V

EE

= 0 or V

CC

= 5.4V,

V

EE

= -5.4V; SHDN = 0

DC CHARACTERISTICS

INPUT LOGIC (TIN, SHDN)

TRANSMITTER OUTPUTS

TIMING CHARACTERISTICS

MAX3188E/MAX3189E

±15kV ESD-Protected, 1Mbps, 1µA

RS-232 Transmitters in SOT23-6

_______________________________________________________________________________________ 3

Typical Operating Characteristics

(VCC= +5.4V, VEE= -5.4V, RL= 3kΩ, TA= +25°C, unless otherwise noted.)

ELECTRICAL CHARACTERISTICS (continued)

(V

CC

= +4.5V to +6V, VEE= -4.5V to -6V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V

CC

= +5.4V, V

EE

= -5.4V,

and T

A

= +25°C.) (Note 2)

Note 2: All devices are 100% tested at T

A

= +25°C. All limits over temperature are guaranteed by design.

PARAMETER SYMBOL MIN TYP MAX UNITS

±15

±8

TOUT

±15

kV

CONDITIONS

Human Body Model

IEC 1000-4-2 Contact Discharge

IEC 1000-4-2 Air-Gap Discharge

ESD PROTECTION

SUPPLY CURRENT vs. DATA RATE

= 150pF)

(C

2.5

2.0

ICC (MAX3188E)

1.5

1.0

SUPPLY CURRENT (mA)

0.5

0

00.40.30.1 0.2 0.5 0.6 0.7 0.8 0.9 1.0

L

ICC (MAX3189E)

IEE (MAX3189E)

IEE (MAX3188E)

DATA RATE (Mbps)

MAX3188E/9E toc01

SUPPLY CURRENT vs. DATA RATE

= 1000pF)

(C

7

6

5

4

3

MAX3189E

2

SUPPLY CURRENT (mA)

1

0

0 0.40.30.1 0.2 0.5 0.6 0.7 0.8 0.9 1.0

L

MAX3188E

DATA RATE (Mbps)

4.0

3.5

MAX3188E/9E toc02

3.0

2.5

2.0

1.5

SUPPLY CURRENT (mA)

1.0

0.5

MAX3188E

SUPPLY CURRENT

vs. OUTPUT CAPACITANCE

250kbps

120kbps

40kbps

0

0 500 1000 1500 2000 2500

OUTPUT CAPACITANCE (pF)

MAX3188E/9E toc03

MAX3189E

SUPPLY CURRENT

vs. OUTPUT CAPACITANCE

14

12

10

8

6

SUPPLY CURRENT (mA)

4

2

0

0 1000500 1500 2000 2500

OUTPUT CAPACITANCE (pF)

1Mbps

500kbps

240kbps

40kbps

MAX3188E/9E toc04

SLEW RATE vs. OUTPUT CAPACITANCE

MAX3188E

14

12

10

8

6

SLEW RATE (V/µs)

4

2

0

0 1000500 1500 2000 2500

OUTPUT CAPACITANCE (pF)

-SLEW

+SLEW

MAX3188E/9E toc05

SLEW RATE vs. OUTPUT CAPACITANCE

MAX3189E

90

80

70

60

50

40

SLEW RATE (V/µs)

30

20

10

0

0 1000500 1500 2000 2500

OUTPUT CAPACITANCE (pF)

-SLEW

+SLEW

MAX3188E/9E toc06