CAT1027WI-45-G ON Semiconductor, CAT1027WI-45-G Datasheet - Page 3

• Manufacturer Part Number: CAT1027WI-45-G
• Description: Supervisory Circuits CPU w/2K
• Manufacturer: ON Semiconductor

Specifications of CAT1027WI-45-G

• Product Category: Supervisory Circuits
• Rohs: yes
• Number Of Voltages Monitored: 1
• Monitored Voltage: 3 V, 3.3 V, 5 V
• Undervoltage Threshold: 4.5 V
• Overvoltage Threshold: 4.75 V
• Manual Reset: Not Resettable
• Watchdog: Watchdog
• Supply Voltage - Max: 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8 Wide
• Maximum Power Dissipation: 1000 mW
• Minimum Operating Temperature: - 40 C
• Supply Current (typ): 3000 uA
• Supply Voltage - Min: 2.7 V

PIN DESCRIPTION
RESET/RESET
(RESET CAT1026 Only)
These are open drain pins and RESET
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
¯¯¯¯¯¯ pin must be connected through a pull-up
RESET
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
The V
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
output will be driven low. An external resistor divider is
used to set the voltage level to be sensed. Connect
V
V
This open drain output goes low when V
than 1.25 V and goes high when V
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.
CAT10XX FAMILY OVERVIEW
For supervisory circuits with embedded 16k EEPROM, please refer to the CAT1161, CAT1162 and CAT1163
data sheets.
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
CAT1021
CAT1022
CAT1023
CAT1024
CAT1025
CAT1026
CAT1027
SENSE
SENSE
LOW
Device
: AUXILIARY VOLTAGE MONITOR OUTPUT
SENSE
: AUXILIARY VOLTAGE MONITOR INPUT
to V
¯¯¯¯¯¯
CC
input is a second voltage monitor which is
Input Pin
if unused.
Manual
Reset
: RESET OUTPUTs
Watchdog
¯¯¯¯¯¯ can be used
SENSE
Watchdog
Monitor
exceeds the
SENSE
SDA
SDA
WDI
WDI
Pin
is less
LOW
Protection
Write
3
Pin
PIN FUNCTION
OPERATING TEMPERATURE RANGE
¯¯¯¯¯¯
RESET
RESET
Extended
Industrial
V
Name
V
SDA
SCL
WDI
V
Pin
V
SENSE
LOW
CC
SS
Voltage Sense
Independent
Auxiliary
Function
Active Low Reset Input/Output
Ground
Serial Data/Address
Clock Input
Active High Reset Output
(CAT1026 only)
Power Supply
Auxiliary Voltage Monitor Input
Auxiliary Voltage Monitor Output
Watchdog Timer Interrupt
(CAT1027 only)
-40ºC to 85ºC
-40ºC to 125ºC
Active High
and LOW
RESET:
CAT1026, CAT1027
Doc. No. MD-3010 Rev. P
EEPROM
2k
2k
2k
2k
2k
2k
2k