The 33290 is a serial link bus interface device designed to provide a two-way half-duplex communication interface for automotive diagnostic applications. It connects the on-board microcontroller to the off-board system via a special ISO K wire. The 33290 is designed to meet the diagnostic system ISO9141 specification.
33290 Simplified application diagram
Although the 33290 is designed primarily for automotive applications, it is also suitable for other serial communication applications. Ambient temperature :-40ºC≤TA≤125ºC, 8.0 V≤VBB≤18v power supply. The economical SO-8 surface-mount plastic packaging makes the 33290 very cost effective.
Block diagram
The output of the device's K-bus driver fully protects the bus from short circuit and overtemperature conditions. The 33290 achieves robustness to extreme temperatures and voltages by building on the SMARTMOS process, combining CMOS logic, bipolar /MOS analog circuits, and DMOS power FETs.
Features
• Operates Over Wide Supply Voltage of 8.0 to 18V
• Operating Temperature of -40 to 125°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
• 8.0kV ESD Protection Attainable with Few Additional Components
• Standby Mode: No VBat Current Drain with VDD at 5.0V
• Low Current Drain During Operation with VDD at 5.0V
• Pb-Free Packaging Designated by Suffix Code EF
Package size
