FEATURES
s s s s s s s s DESCRIPTIO Guaranteed Reset Assertion at VCC = 1V 1.5mA Maximum Supply Current SO-8 Packaging 4.65V Precision Voltage Monitor Power OK/Reset Time Delay: 200ms Minimum External Component Count Performance Specified Over Temperature Superior Upgrade for MAX699 Precise internal voltage reference and comparator circuit monitor the power supply line. In addition, the RESET output is guaranteed to remain logic low even with VCC as low as 1V. An internal watchdog timer is also available, which forces the RESET output to active low when the watchdog input is not toggled prior to the time-out period of 1.6 seconds. The LTC699 is offered in DIP and surface mount packages. APPLICATI s s s s S Critical µP Power Monitoring Intelligent Instruments Computers and Controllers Automotive Systems TYPICAL APPLICATI +5V BLOCK DIAGRA VCC 500k VCC RESET LTC699 WDI GND µP POWER µP RESET + RESET PULSE GENERATOR µP SYSTEM I/O LINE 1.3V C1 – OSC 0.1µF 0.1µF WDI TRANSITION DETECTOR LTC699 TA1 MICROPROCESSOR RESET AND WATCHDOG TIMING IN A SINGLE CHIP FOR MICROPROCESSOR SYSTEMS.
Linear Technology
