DESCRIPTION
The L9703isa bipolar monolithic integratedcir cuit for monitoring the status of up to eight contacts connected to GND.
It contains eight contact senseinputs and eight microcomputer compatible three-state outputs.

. OPERATING DC SUPPLY VOLTAGE RANGE 5V TO 25V
. SUPPLY OVERVOLTAGEPULSE 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 CURRENT OF 10mA DEFINED BY EXTERNAL CONTACT SERIES RESISTORS RI N1–8
. CONTACT STATUS MONITORING BY COMPARING THE RESISTANCE AT CONTACT SENSEINPUTS WITHTHE INTERNAL REFERENCE RESISTOR VALUE
. HIGHIMMUNITY DUE TO RESISTANCE COMPARISON WITH HYSTERESIS