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Description

The L9637 is a monolithic integrated circuit containing standard ISO 9141 compatible interface functions.

Features

■ Operating power supply voltage range

4.5 V ≤ VS ≤ 36 V (40 V for transients)

■ Reverse supply (battery) protected down to

VS ≥ -24 V

■ Standby mode with very low current

consumption ISSB ≤ 1 mA @ VCC ≤ 0.5 V

■ Low quiescent current in off condition

ISOFF = 120 μA

■ 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

-24 V ≤ VK ≤ VS

■ K output current limitation, typ. IK = 60 mA

■ 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