LTC699 Datasheet | Linear Technology

LTC699 Microprocessor Supervisory Circuit Features s s s s s s s s DESCRIPTIO Guaranteed Reset Assertion at VCC = 1V 1.5m A Maximum Supply Current SO-8 Packaging 4.65V Precision Voltage Monitor Power OK/Reset Time Delay: 200ms Minimum External ponent Count Performance Specified Over Temperature Superior Upgrade for MAX699 The LTC699 provides power supply monitoring for microprocessor-based systems. The Features include microprocessor reset and watchdog timing. Precise internal voltage reference and parator circuit monitor the power supply line. When an out-of-tolerance condition occurs, the RESET output is forced to active low. 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 Critical µP Power Monitoring Intelligent Instruments puters and Controllers Automotive Systems TYPICAL APPLICATI +5V BLOCK DIAGRA 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. RESET GND WATCHDOG TIMER LTC699 BD LTC699 ABSOLUTE (Notes 1 and 2) AXI U RATI GS PACKAGE/ORDER I FOR ATIO TOP VIEW VCC VCC 1 2 LTC699 8 GND 7 RESET 6 WDI 5...