L9637D datasheet(1/11 Pages) STMICROELECTRONICS

Part #	L9637D

Description	ISO 9141 INTERFACE

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L9637

ISO 9141 INTERFACE

OPERATING POWER SUPPLY VOLTAGE

RANGE 4.5V

≤ VS ≤ 36V (40V FOR TRAN-

SIENTS)

REVERSE

SUPPLY

(BATTERY)

PRO-

TECTED DOWN TO VS

≥ -24V

STANDBY MODE WITH VERY LOW CUR-

RENT CONSUMPTION ISSB 1

µA@ VCC 0.5V

LOW QUIESCENT CURRENT IN OFF CON-

DITION ISOFF = 120

µA

TTL COMPATIBLE TX INPUT

BIDIRECTIONAL K-I/O PIN WITH SUPPLY

VOLTAGE DEPENDENT INPUT THRESHOLD

OVERTEMPERATURE SHUT DOWN FUNC-

TION SELECTIVE TO K-I/O PIN

WIDE

INPUT

AND

OUTPUT

VOLTAGE

RANGE -24V

≤ VK ≤ VS

K OUTPUT CURRENT LIMITATION, TYP IK =

60mA

DEFINED OFF OUTPUT STATUS IN UNDER-

VOLTAGE CONDITION AND VS OR GND IN-

TERRUPTION

CONTROLLED OUTPUT SLOPE FOR LOW

EMI

HIGH INPUT IMPEDANCE FOR OPEN VS OR

GND CONNECTION

DEFINED OUTPUT ON STATUS OF LO OR

RX FOR OPEN LI OR K INPUTS

DEFINED K OUTPUT OFF FOR TX INPUT

OPEN

INTEGRATED PULL UP RESISTORS FOR

TX, RX AND LO

EMI ROBUSTNESS OPTIMIZED

DESCRIPTION

The L9637 is a monolithic integrated circuit con-

taining standard ISO 9141 compatible interface

functions.

December 1998

®

TX

RX

LO

GND

LI

-

+

VS

VCC

K

1, 75 V

-

+

RT X

R L O

RRX

IL I

IK

OF F

-

+

BLOCK DIAGRAM

ORDERING NUMBERS:

L9637D

L9637

SO8

Minidip

1/11

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