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CAT1026 Datasheet(PDF) 3 Page - Catalyst Semiconductor

No. de Pieza. CAT1026
Descripción  Dual Voltage Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM
Descarga  20 Pages
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Fabricante  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
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CAT1026 Datasheet(HTML) 3 Page - Catalyst Semiconductor

 
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CAT1026, CAT1027
© 2007 Catalyst Semiconductor, Inc.
3
Doc. No. 3010 Rev. L
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.
VSENSE: AUXILIARY VOLTAGE MONITOR INPUT
The VSENSE input is a second voltage monitor which is
compared against CAT1026 and CAT1027 internal
reference voltage of 1.25V typically. Whenever the
input voltage is lower than 1.25V, the open drain VLOW
output will be driven low. An external resistor divider is
used to set the voltage level to be sensed. Connect
VSENSE to VCC if unused.
VLOW: AUXILIARY VOLTAGE MONITOR OUTPUT
This open drain output goes low when VSENSE is less
than 1.25V and goes high when VSENSE 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
VSS
Ground
SDA
Serial Data/Address
SCL
Clock Input
RESET
Active High Reset Output
(CAT1026 only)
VCC
Power Supply
VSENSE
Auxiliary Voltage Monitor Input
VLOW
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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