L9637D ISO 9141 INTERFACE
- OPERATING POWER SUPPLY VOLTAGE RANGE 4.5V ≤ VS ≤ 36V (40V FOR TRANSIENTS)

- REVERSE SUPPLY (BATTERY) PROTECTED DOWN TO VS ≥ -24V
- STANDBY MODE WITH VERY LOW CURRENT CONSUMPTION ISSB 1µA @ VCC 0.5V
- LOW QUIESCENT CURRENT IN OFF CONDITION ISOFF = 120µA
- TTL COMPATIBLE TX INPUT
- BIDIRECTIONAL K-I/O PIN WITH SUPPLY VOLTAGE DEPENDENT INPUT THRESHOLD
- OVERTEMPERATURE SHUT DOWN FUNCTION 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 UNDERVOLTAGE CONDITION AND VS OR GND INTERRUPTION
- 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 L9637D is a monolithic integrated circuit containing standard ISO 9141 compatible interface functions.
ABSOLUTE MAXIMUM RATINGS (No damage or latch)
Symbol | Parameter | Value | Unit |
VS | Supply Voltage ISO transients t = 400ms | -24 to +36 -24 to +40 | V V |
VCC | Stabilized Voltage | -0.3 to +7 | V |
∆VS/dt | Supply Voltage transient | -10 to +10 | V/µs |
VLI, K | Pin Voltage | -24 to VS | V |
VLO, RX, TX | Pin Voltage | -24 to VCC | V |
Note: Max. ESD voltages are ±2kV with human body model C = 100pF, R = 1.5k corresponds to maximum energy dissipation 0.2mJ according to MIL883C.
BLOCK DIAGRAM

PIN CONNECTION (Top view)

OUTLINE AND MECHANICAL DATA
SO8

