L9637(1998) Просмотр технического описания (PDF) - STMicroelectronics

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L9637
(Rev.:1998)

ISO 9141 INTERFACE

STMicroelectronics 

®

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 1µA @ VCC 0.5V

LOW QUIESCENT CURRENT IN OFF CON-

DITION ISOFF = 120µA

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

SO8

Minidip

ORDERING NUMBERS:

L9637D

L9637

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.

BLOCK DIAGRAM

VCC

VS

RTX RL O RRX

K

IK O F F

-

TX

+

1, 75 V

-

RX

+

LI

LO

-

IL I

+

GND

December 1998

1/11

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