The 33660 is a serial link bus interface device designed to provide bi-directional half-duplex communication interfacing in automotive diagnostic applications. It is designed to interface between the vehicle?s on-board microcontroller and systems off-board the vehicle via the special ISO K line. The 33660 is designed to meet the Diagnostic System ISO9141 specification. The device?s K line bus driver?s output is fully protected against bus shorts and overtemperature conditions.
Features
Operates Over Wide Supply Voltage of 8.0 to 18 V
Operating Temperature of -40 to 125 °C
Interfaces Directly to Standard CMOS Microprocessors
ISO K Line Pin Protected Against Shorts to Battery
Thermal Shutdown with Hysteresis
ISO K Line Pin Capable of High Currents
ISO K Line Can Be Driven with up to 10 nF of Parasitic Capacitance
8.0 kV ESD Protection Attainable with Few Additional Components
Standby Mode: No VBat Current Drain with VDD at 5.0 V
Low Current Drain During Operation with VDD at 5.0 V
Schematic: