Description
The L9637 is a monolithic integrated circuit containing standard ISO 9141 compatible interface functions.
Features
â Operating power supply voltage range
4.5 V ⤠VS ⤠36 V (40 V for transients)
â Reverse supply (battery) protected down to
VS ⥠-24 V
â Standby mode with very low current
consumption ISSB ⤠1 mA @ VCC ⤠0.5 V
â Low quiescent current in off condition
ISOFF = 120 µA
â TTL compatible TX input
â Bidirectional K-I/O pin with supply voltage
dependent input threshold
â Overtemperature shut down function Selective
to K-I/O pin
â Wide input and output voltage range
-24 V ⤠VK ⤠VS
â K output current limitation, typ. IK = 60 mA
â Defined OFF output status in undervoltage
condition and VS or GND interruption
â Controlled output slope for low EMI
â High input impedance for open VS or GND
connection
â Defined output ON status of LO or RX for open
LI or K inputs
â Defined K output OFF for TX input open
â Integrated pull up resistors for TX, RX and LO
â EMI robustness optimized
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