DESCRIPTION
The L9704 is a bipolar monolithic integrated circuit for monitoring the statusof up to eight contacts connected to the power supply (battery).
It contains eight contact sense inputs and eight microcomputer compatible three-state outputs.

■ OPERATING DC SUPPLY VOLTAGE RANGE 5V TO 25V
■ SUPPLY OVERVOLTAGE PULSE UP TO 40V
■ VERY LOW STANDBY QUIESCENT CURRENT 0.2mA
■ INTERNAL CLAMPING DIODES AT CONTACT INPUTS TO VS AND GND
■ INPUT PULSE CURRENT CAPABILITY UP TO + 50mA, – 75mA
■ NOMINAL CONTACT CURRENTS OF 10mA
   DEFINED BY EXTERNAL CONTACT SERIES
   RESISTORS RIN1-8
■ CONTACT STATUS MONITORING BY COM
   PARING THE RESISTANCE AT CONTACT
   SENSEINPUTS WITH THEINTERNAL REFERENCE RESISTOR VALUE
■ HIGH IMMUNITY DUE TO RESISTANCE COMPARISON WITH HYSTERESIS