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DESCRIPTION

This device combines three popular functions, Power on Reset, Watchdog Timer, and Supply Voltage Supervision in one package. This combination lowers system cost, reduces board space requirements, and increases reliability.

FEATURES

? 200ms power-on reset delay

? Low VCC detection and reset assertion

—Five standard reset threshold voltages

—Adjust low VCC reset threshold voltage using special programming sequence

—Reset signal valid to VCC = 1V

? Selectable nonvolatile watchdog timer

—0.2, 0.6, 1.4 seconds

—Off selection

—Select settings through software

? Long battery life with low power consumption

—<50μA max standby current, watchdog on

—<1μA max standby current, watchdog off

? 2.7V to 5.5V operation

? SPI mode 0 interface

? Built-in inadvertent write protection

—Power-up/power-down protection circuitry

—Watchdog change latch

? High reliability

? Available packages

—8 Ld TSSOP

—8 Ld SOIC

—8 Ld PDIP

? Pb-free plus anneal available (RoHS compliant)