Dual-Voltage Supervisory
CAT1026, CAT1027
Dual Voltage Supervisory Circuits with EEPROM Serial 2k-bit I2C
Description The CAT1026 and CAT1027 a...
Description
CAT1026, CAT1027
Dual Voltage Supervisory Circuits with EEPROM Serial 2k-bit I2C
Description The CAT1026 and CAT1027 are complete memory and supervisory
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solutions for microcontroller−based systems. A EEPROM Serial 2k−bit I2C memory and a system power supervisor with brown−out
protection are integrated together in low power CMOS technology. Memory interface is via a 400 kHz I2C bus.
The CAT1026 and CAT1027 provide a precision VCC sense circuit
with five reset threshold voltage options that support 5 V, 3.3 V and 3 V systems. The power supply monitor and reset circuit protects
SOIC−8 CASE 751BD
TSSOP−8 CASE 948S
memory and systems controllers during power up/down and against
brownout conditions. If power supply voltages are out of tolerance
reset signals become active preventing the system microcontroller,
ASIC, or peripherals from operating.
The CAT1026 features two open drain reset outputs: one (RESET) drives high and the other (RESET) drives low whenever VCC falls
MSOP−8 CASE 846AD
TDFN−8 CASE 511AL
below the threshold. Reset outputs become inactive typically 200 ms
after the supply voltage exceeds the reset threshold value. With both
active high and low reset signals, interface to microcontrollers and other ICs is simple. CAT1027 has only a RESET output. In addition,
ORDERING INFORMATION
the RESET pin can be used as an input for push−button manual reset
For Ordering Information details, see page 13.
capability.
The CAT1026 and CAT1027 ...
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