描述 Description

The NXP? MC33789 is a mixed signal IC for airbag safety applications that provides a cost-effective and flexible system IC solution across the range of airbag partitions used in cars and other vehicles.
Connects to the 12 V vehicle battery and supplies the multiple voltages of a typical airbag system
Can detect switched input states and communicate with both local and remote crash sensors
Offers an industry standard interface (SPI) and four PSI5 master interfaces
Diagnostic - self protection capability and a programmable analog interface accessible by the system MCU
The MC33789 is a SafeAssure? functional safety solution.

特性 Features

? Designed to operate 5.2 V ≤ VPWR ≤ 20 V, up to 40 V transients
? Safing state machine with programmable sensing thresholds
? Two configurable high side/low side drivers with PWM capability
? Four PSI5 satellite sensor master interfaces
? Self-protected and diagnostic capability
? System power mode control with watchdog and system Power On Reset (POR)
? Supports complete airbag system power supply architecture, including system power mode control, supplies for squib firing (33 V), satellite sensors (6.3 V), and local ECU sensors and ECU logic circuits (5.0 V)
? Nine configurable switch input monitors for simple switch and Hall-effect sensor interfaces
? 16-bit SPI interface
? LIN 2.1 physical layer interface