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CAT1027WI28 其他数据使用手册 - ON Semiconductor（安森美）
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CAT1027WI28数据手册
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CAT1026, CAT1027
© 2009 SCILLC. All rights reserved. 3 Doc. No. MD-3010 Rev. P
Characteristics subject to change without notice
PIN DESCRIPTION
RESET/RESET
¯¯¯¯¯¯
: RESET OUTPUTs
(RESET CAT1026 Only)
These are open drain pins and RESET
¯¯¯¯¯¯
can be used
as a manual reset trigger input. By forcing a reset
condition on the pin the device will initiate and
maintain a reset condition. The RESET pin must be
connected through a pull-down resistor, and the
RESET
¯¯¯¯¯¯
pin must be connected through a pull-up
resistor.
SDA: SERIAL DATA ADDRESS
The bidirectional serial data/address pin is used to
transfer all data into and out of the device. The SDA
pin is an open drain output and can be wire-ORed
with other open drain or open collector outputs.
SCL: SERIAL CLOCK
Serial clock input.
V
SENSE
: AUXILIARY VOLTAGE MONITOR INPUT
The V
SENSE
input is a second voltage monitor which is
compared against CAT1026 and CAT1027 internal
reference voltage of 1.25 V typically. Whenever the
input voltage is lower than 1.25 V, the open drain V
LOW
output will be driven low. An external resistor divider is
used to set the voltage level to be sensed. Connect
V
SENSE
to V
CC
if unused.
V
LOW
: AUXILIARY VOLTAGE MONITOR OUTPUT
This open drain output goes low when V
SENSE
is less
than 1.25 V and goes high when V
SENSE
exceeds the
reference voltage.
WDI (CAT1027 Only): WATCHDOG TIMER INTERRUPT
Watchdog Timer Interrupt Input is used to reset the
watchdog timer. If a transition from high to low or low
to high does not occur every 1.6 seconds, the RESET
outputs will be driven active.
PIN FUNCTION
Pin
Name
Function
RESET
¯¯¯¯¯¯
Active Low Reset Input/Output
V
SS
Ground
SDA Serial Data/Address
SCL Clock Input
RESET
Active High Reset Output
(CAT1026 only)
V
CC
Power Supply
V
SENSE
Auxiliary Voltage Monitor Input
V
LOW
Auxiliary Voltage Monitor Output
WDI
Watchdog Timer Interrupt
(CAT1027 only)
OPERATING TEMPERATURE RANGE
Industrial -40ºC to 85ºC
Extended -40ºC to 125ºC
CAT10XX FAMILY OVERVIEW
Device
Manual
Reset
Input Pin
Watchdog
Watchdog
Monitor
Pin
Write
Protection
Pin
Independent
Auxiliary
Voltage Sense
RESET:
Active High
and LOW
EEPROM
CAT1021
SDA
2k
CAT1022
SDA 2k
CAT1023
WDI
2k
CAT1024
2k
CAT1025
2k
CAT1026
2k
CAT1027
WDI
2k
For supervisory circuits with embedded 16k EEPROM, please refer to the CAT1161, CAT1162 and CAT1163
data sheets.
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