FEATURES

• Monitoring voltages: 5V to 9V

• Independent core voltage monitor

• Triple voltage detection and reset assertion

—Standard reset threshold settings. See selection

table on page 2.

—Adjust low voltage reset threshold voltages

using special programming sequence

—Reset signal valid to VCC = 1V

—Monitor three separate voltages

• Fault detection register

• Selectable power-on reset timeout

(0.05s, 0.2s, 0.4s, 0.8s)

• Selectable watchdog timer interval

(25ms, 200ms, 1.4s or off)

• Debounced manual reset input

• Low power CMOS

—25μA typical standby current, watchdog on

—6μA typical standby current, watchdog off

• Memory security

• 4Kbits of EEPROM

—16 byte page write mode

—5ms write cycle time (typical)

• Built-in inadvertent write protection

—Power-up/power-down protection circuitry

—Block lock protect 0, or 1/2, of EEPROM

• 400kHz 2-wire interface

• 2.7V to 5.5V power supply operation

• Available packages

—14 Ld SOIC, TSSOP

• Pb-free plus anneal available (RoHS compliant)

APPLICATIONS

• Communication equipment

—Routers, hubs, switches

—Disk arrays, network storage

• Industrial systems

—Process control

—Intelligent instrumentation

• Computer systems

—Computers

—Network servers