参数资料
型号: MCZ33789AER2
厂商: Freescale Semiconductor
文件页数: 1/2页
文件大小: 0K
描述: IC SBC W/PWR SUPPLY 64LQFP
标准包装: 1,500
应用: 车载系统
电源电压: 5.2 V ~ 20 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 64-LQFP 裸露焊盘
供应商设备封装: 64-LQFP EP(10x10)
包装: 带卷 (TR)
Analog,
Eyebrow Mixed Signal and Power Management
MC33789
Headline
Airbag system basis chip (SBC) with power
Target Applications
? Automotive Airbag Safety Systems
Basic Airbag Systems
Advanced Airbag Systems
? Motorcycle - ATV Safety Systems
Frame Mounted Single Loop
Airbag System
supply and PSI5 sensor interface
Overview
The MC33789 is a mixed signal IC for airbag safety applications. The MC33789 is a
SafeAssure functional safety solution. The MC33789 provides a cost effective and flexible
system IC solution across the range of airbag partitions used in cars and other vehicles.
The MC33789 connects to the 12 V vehicle battery and supplies the multiple voltages of a
typical airbag system. The MC33789 can detect switched input states, communicate with both
local and remote crash sensors. It offers an industry standard interface (SPI) and four PSI5
master interfaces. The MC33789 has a dedicated safing state machine that complements
the airbag’s MCU hardware/software safing approach. Also included are a diagnostic - self
protection capability and a programmable analog interface accessible by the system MCU.
MC33789 Simplified Application Drawing
MC33789
Wake Up
V BAT
IN1
WAKE
9 Input
IN2
VPWR
V BAT
Monitors
IN8
BSTSW
IN9
PSI5_1
PSI5_2
VBST
33V
4 Satellite
Sensor
Interfaces
PSI5_3
PSI5_4
VER
ERSW
Energy
Reserve
VFIRE_x
5V
5V
SQB_H1
5V
5V
X/Y-axis
Accel.
Sensor
V BAT
Sensor SPI
OUT1_D
OUT1_S
SPI
AOUT
BUCKSW
VBUCK
VCCDRI
VCC
LIN
9V
5V
Output
Squib
Driver 1
SQB_L1
FEN_1
SQB_H1
Squib
Driver 2
SQB_L1
SPI_A
RESET
ARM
FEN_2
AIN
RESET
SPI_B
MCU
2
Squib Driver SPI
ARM_X and ARM_Y for Squib Driver 2 FENs
RESET
SPI
Cross-coupled
Squib
Connection
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