View mc33290rev0 datasheet:

Order this document by MC33290/D MC33290 Advance Information ISO Serial Link Interface The MC33290 is a serial link bus interface device designed to provide ISO SERIAL LINK bi–directional half–duplex communication interfacing in automotive diagnostic applications. It is designed to interface between the vehicle’s INTERFACE on–board microcontroller and systems off–board the vehicle via the special ISO K line. The MC33290 is designed to meet the “Diagnostic Systems SEMICONDUCTOR ISO9141” specification. The device’s K line bus driver’s output is fully TECHNICAL DATA protected against bus shorts and over temperature conditions. The MC33290 derives it’s robustness to temperature and voltage extremes from being built on a SMARTMOS? process, incorporating CMOS logic, bipolar/MOS a