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L9704

OCTAL SUPPLY CONTACT MONITORING CIRCUIT

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OPERATING DC SUPPLY VOLTAGE RANGE

5V TO 25V

SUPPLY OVERVOLTAGE PULSE UP TO 40V

VERY LOW STANDBY QUIESCENT CUR-

RENT 0.2mA

INTERNAL CLAMPING DIODES AT CONTACT

INPUTS TO V

S

AND GND

INPUT PULSE CURRENT CAPABILITY UP TO

+ 50mA, 鈥?75mA

NOMINAL CONTACT CURRENTS OF 10mA

DEFINED BY EXTERNAL CONTACT SERIES

RESISTORS R

IN1-8

CONTACT STATUS MONITORING BY COM-

PARING THE RESISTANCE AT CONTACT

SENSEINPUTS WITH THE INTERNAL REFER-

ENCE RESISTOR VALUE

HIGH IMMUNITY DUE TO RESISTANCE COM-

PARISON WITH HYSTERESIS

DIP鈥?0

SO鈥?0L

ORDERING NUMBERS:

L9704 (DIP鈥?0)

L9704D (SO鈥?0L)

DESCRIPTION

The L9704 is a bipolar monolithic integrated circuit

for monitoring the status of up to eight contactscon-

nected to the power supply (battery).

BLOCK DIAGRAM

It contains eight contact sense inputs and eight mi-

crocomputer compatible three-state outputs.

March 1992

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L9704D相關(guān)型號PDF文件下載

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