LTC694IN8

IC MPU SUPERVISORY CIRCUIT 8-DIP

DESCRIPTION

The LTC®690 family provides complete power supply monitoring and battery control functions for microprocessor reset, battery back-up, CMOS RAM write protection, power failure warning and watchdog timing. A precise internal voltage reference and comparator circuit monitor the power supply line. When an out-of-tolerance condition occurs, the reset outputs are forced to active states and the chip enable output unconditionally write-protects external memory. In addition, the RESET output is guaranteed to remain logic low even with VCC as low as 1V.

FEATURES

■ Guaranteed Reset Assertion at VCC = 1V

■ 1.5mA Maximum Supply Current

■ Fast 35ns Max Onboard Gating of RAM Chip Enable Signals

■ SO-8 and S16 Packaging

■ 4.65V Precision Voltage Monitor

■ Power OK/Reset Time Delay: 50ms, 200ms or Adjustable

■ Minimum External Component Count

■ 1µA Maximum Standby Current

■ Voltage Monitor for Power-Fail or Low-Battery Warning

■ Thermal Limiting

■ Performance Specifi ed Over Temperature

■ Superior Upgrade for MAX690 Family

APPLICATIONS

■ Critical μP Power Monitoring

■ Intelligent Instruments

■ Battery-Powered Computers and Controllers

■ Automotive Systems