XL33290

The XL33290 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 XL33290 is designed to meet the Diagnostic Systems ISO9141 specification. The device’s K line bus driver’s output is fully protected against bus shorts and overtemperature conditions. The XL33290 derives its robustness to temperature and voltage extremes by being built on a SMARTMOS process, incorporating CMOS logic, bipolar/MOS analog circuitry, and DMOS power FETs. Although the XL33290 was principally designed for automotive applications, it is suited for other serial communication applications. It is parametrically specified over an ambient temperature range of -40°C ≤ TA ≤ 85°C and 8.0 V ≤ VBB ≤ 18 V supply. The economical SOP8 surface-mount plastic package makes the XL33290 very cost effective.

Applications

• automotive environment usage compliant with OnBoard Diagnostic (OBD) requirements
• other serial communication applications

Key features

• Operates Over Wide Supply Voltage of 8.0 to 18V
• Operating Temperature of -40 to 85°C
• Interfaces Directly to Standard CMOS Microprocessors
• ISO K Line Pin Protected Against Shorts to Ground
• 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