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L9705 Datasheet

  • L9705

  • DOUBLE QUAD CONTACT INTERFACE CIRCUIT

  • 173.70KB

  • 8頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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L9705
DOUBLE QUAD CONTACT INTERFACE CIRCUIT
ADVANCE DATA
OPERATING DC SUPPLY VOLTAGE RANGE
5V TO 25V
SUPPLY OVERVOLTAGE PULSE UP TO 40V
VERY LOW STAND-BY QUIESCENT CUR-
RENT, MAX 50碌A(chǔ)
INTERNAL CLAMPING DIODES AT CONTACT
INPUTS TO Vs AND gnd WITH PULSE CUR-
RENT CAPABILITY UP TO +50mA, -75mA
CHIP ENABLE FUNCTION AND TRISTATE
OUTPUTS FOR PARALLEL BUS CONNECTION
NOMINAL CONTACT CURRENTS OF 10mA
DEFINED WITH EXTERNAL CONTACT SE-
RIES RESISTORS R
IN1-8
CONTACT STATUS MONITORING BY
MEANS OF COMPARING THE RESISTANCE
AT CONTACT SENSE INPUTS WITH THE IN-
TERNAL REFERENCE RESISTOR VALUE
RESISTANCE COMPARING WITH HYSTER-
ESIS FOR HIGH NOISE IMMUNITY AND IM-
MUNITY TO GROUND AND BATTERY PO-
TENTIAL DIFFERENCES
BLOCK DIAGRAM
DIP 20
SO20L
ORDERING NUMBERS :
L9705
DESCRIPTION
The L9705 is a bipolar monolithic integrated cir-
cuit for monitoring the status of up to four con-
tacts connected to GND and up to four contacts
connected to the battery. The contact sense input
supply the contact current and perform the con-
tact resistance comparison function.
At the output the contact status is translated into
a logical LOW level (contact closed) or logical
HIGh level (contact open).
January 1992
1/8
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

L9705 產(chǎn)品屬性

  • 20

  • 集成電路 (IC)

  • 接口 - 專用

  • -

  • 監(jiān)控，數(shù)字電流

  • -

  • 5 V ~ 25 V

  • 20-DIP（0.300"，7.62mm）

  • 20-DIP

  • 管件

  • 通孔

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