L9705集成电路（IC）的专用规格书PDF中文资料

L9705属于集成电路（IC）的专用。由意法半导体集团制造生产的L9705专用该系列产品可提供所需的功能，用以将信息源/信宿连到各种复杂或范围狭窄应用中的传感器、变送器、致动器、传输介质或其他此类端点。例如，汽车安全气囊驱动器、车身控制和信息娱乐总线、自适应电缆均衡器、智能卡等等。

DESCRIPTION

The L9705 is a bipolar monolithic integrated circuit for monitoring the status of up to four contacts connected to GND and up to four contacts connected to the battery. The contact sense input supply the contact current and perform the contact resistance comparison function.

At the output the contact status is translated into a logical LOW level (contact closed) or logical HIGH level (contact open).

■ OPERATING DC SUPPLY VOLTAGE RANGE 5V TO 25V

■ SUPPLY OVERVOLTAGE PULSE UP TO 40V

■ VERY LOW STAND-BY QUIESCENT

CURRENT, MAX 50µA

■ INTERNAL CLAMPING DIODES AT

CONTACT INPUTS TO Vs AND gnd WITH

PULSE CURRENT CAPABILITY UP TO

+50mA, -75mA

■ CHIP ENABLE FUNCTION AND

TRISTATE OUTPUTS FOR PARALLEL BUS

CONNECTION

■ NOMINAL CONTACT CURRENTS OF 10mA

DEFINED WITH EXTERNAL CONTACT

SERIES RESISTORS RIN1-8

■ CONTACT STATUS MONITORING BY

MEANS OF COMPARING THE RESISTANCE

AT CONTACT SENSE INPUTS WITH THE

INTERNAL REFERENCE RESISTOR VALUE

■ RESISTANCE COMPARING WITH

HYSTERESIS FOR HIGH NOISE IMMUNITY

AND IMMUNITY TO GROUND AND BATTERY POTENTIAL DIFFERENCES