參數(shù)資料
型號： L9705D013TR
廠商： STMICROELECTRONICS
元件分類： 模擬信號調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PDSO20
封裝： SO-20
文件頁數(shù)： 1/9頁
文件大?。?/td> 224K
代理商： L9705D013TR
1/8
L9705
November 2003
s
OPERATING DC SUPPLY VOLTAGE RANGE
5V TO 25V
s
SUPPLY OVERVOLTAGE PULSE UP TO 40V
s
VERY LOW STAND-BY QUIESCENT
CURRENT, MAX 50
A
s
INTERNAL CLAMPING DIODES AT
CONTACT INPUTS TO Vs AND gnd WITH
PULSE CURRENT CAPABILITY UP TO
+50mA, -75mA
s
CHIP ENABLE FUNCTION AND
TRISTATE OUTPUTS FOR PARALLEL BUS
CONNECTION
s
NOMINAL CONTACT CURRENTS OF 10mA
DEFINED WITH EXTERNAL CONTACT
SERIES RESISTORS RIN1-8
s
CONTACT
STATUS
MONITORING
BY
MEANS OF COMPARING THE RESISTANCE
AT CONTACT SENSE INPUTS WITH THE
INTERNAL REFERENCE RESISTOR VALUE
s
RESISTANCE COMPARING WITH
HYSTERESIS FOR HIGH NOISE IMMUNITY
AND IMMUNITY TO GROUND AND BATTERY
POTENTIAL DIFFERENCES
DESCRIPTION
The L9705 is a bipolar monolithic integrated circuit
for monitoring the status of up to four contacts con-
nected 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).
DIP20
SO20
ORDERING NUMBERS:
L9705
L9705D
DOUBLE QUAD CONTACT INTERFACE CIRCUIT
BLOCK DIAGRAM
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