L9637D Datasheet, PDF (1/10 Pages) STMicroelectronics – ISO 9141 INTERFACE

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L9637D
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
ORDERING NUMBER: L9637D
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 L9637D is a monolithic integrated circuit con-
taining standard ISO 9141 compatible interface
functions.
BLOCK DIAGRAM
VCC
VS
RTX RL O RRX
K
IK _{O FF}
-
TX
+
1,75V
-
RX
+
LI
LO
-
IL I
+
GND
September 2002
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