DESCRIPTION

These devices combine three popular functions, Power on Reset Control, Watchdog Timer, and Supply Voltage Supervision. This combination lowers system cost, reduces board space requirements, and increases reliability.

FEATURES

• Selectable watchdog timer

—Select 200ms, 600ms, 1.4s, off

• Low VCC detection and reset assertion

—Five standard reset threshold voltages nominal 4.62V, 4.38V, 2.92V, 2.68V, 1.75V

—Adjust low VCC reset threshold voltage using special programming sequence

—Reset signal valid to VCC = 1V

• Low power CMOS

—12µA typical standby current, watchdog on

—800nA typical standby current watchdog off

—3mA active current

• 400kHz I2C interface

• 1.8V to 5.5V power supply operation

• Available packages

—8-lead SOIC

—8-lead MSOP