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