SN75LBC187

MULTICHANNEL EIA-232 DRIVER/RECEIVER

WITH CHARGE PUMP

SLLS130C – SEPTEMBER 1991 – REVISED MAY 1995

3

POST OFFICE BOX 655303

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, VCC

4.5

5

5.5

V

High level input voltage VIH

DA

2

V

High-level input voltage, VIH

RA, SHUTDOWN

2.4

V

Low-level input voltage, VIL

RA, DA, SHUTDOWN

0.8

V

Receiver input voltage, VI

–25

25

V

High-level output current, IOH

RY

–1

mA

Low-level output current, IOL

RY

3.2

mA

Output current IO

VDD

±10

µA

Output current, IO

VSS

±10

µA

C1, C2, C3, C4 charge pump capacitors

0.1

0.47

µF

Operating free-air temperature, TA

0

70

°C

electrical characteristics over recommended operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH

High level output voltage

Receiver

IO = – 1 mA

3.5

V

VOH

High-level output voltage

Driver

RL = 3 kΩ to GND

5

7

V

VOL

Low level output voltage

Receiver

IO = 3.2 mA

0.4

V

VOL

Low-level output voltage

Driver

RL = 3 kΩ to GND

–7

–5

V

VIT +

Receiver positive-going input voltage threshold

1.7

2.4

V

VIT –

Receiver negative-going input voltage threshold

0.8

1.2

V

Vhys

Receiver input hysteresis voltage (VIT+ – VIT–)

0.5

1

V

ri

Receiver input resistance

VCC = 5 V,

TA = 25°C

3

5

7

k

Ω

ro

Driver output resistance

VCC = 0,

VO = ± 2 V

300

Ω

II

Input current (DA, SHUTDOWN)

VI = 0 to VCC

±50

µA

IOS

Driver output short-circuit current

VO = 0

±10

mA

ICC

Supply current

Normal operation

All outputs open, SHUTDOWN at 2.4 V

15

30

mA

ICC

Supply current

Shutdown mode

All outputs open, SHUTDOWN at 0.1 V

10

µA

† All typical values are at VCC = 5 V and TA = 25°C.