器件名称: E910.34
功能描述: Contact monitor (8 channel to VBAT, parallel interface)
文件大小: 123.2KB 共1页
简 介:BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
Contact monitor (8 channel to VBAT, parallel interface)
FEATURES Supply voltage range VDD 4.25V to 5.25V Monitor supply voltage range VS 5.25V to 25V Maximum overvoltage protection up to 40V Internal clamp diodes at each input to VS and GND Low standby current (typical < 10A) Contact status monitoring by comparison of the resistance at the inputs with an internal reference High noise immunity – 40°C to + 125°C operating temperature SO20w package The output switches to high when the input resistance increases to above 9k and switches to low when the input resistance falls below 1.5k. These values are valid within the supply range 5.25V APPLICATION Automotive electronics Monitor for mechanical switches Monitor for voltage levels A closed switch corresponds to a low logic level on the outputs OUT0-7. to 25V. The input currents are compared with the current of an internal reference resistor. The IC is designed to operate with an external series resistor RIN0 to RIN7 of 1k. The current, driven through the contacts keeps their resistance low. DESCRIPTION The IC monitors the status of all switch contact connected to VS continuously .
BLOCK DIAGRAM
VBAT
VS
VDD
VDD CH7
CH0 EN IN0 OUT0 IN1 IN2 OUT2 IN3 OUT3 IN4 OUT4 IN5 OUT5 IN6 OUT6 IN7 OUT 7 Ref. OUT1
C
68
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