ADM698 Series

Microprocessor Supervisory Circuit

Catalog

Microprocessor Supervisory Circuit

Part	Reset Timeout [Min]	Type	Package / Case	Package / Case	Package / Case	Reset	Operating Temperature [Max]	Operating Temperature [Min]	Number of Voltages Monitored	Output	Supplier Device Package	Mounting Type	Package / Case [x]	Package / Case [y]
Analog Devices ADM698AN	140 ms	Simple Reset/Power-On Reset	0.3 in	8-DIP	7.62 mm	Active High/Active Low	85 °C	-40 °C	1	Push-Pull	8-PDIP	Through Hole
Analog Devices ADM698AR	140 ms	Simple Reset/Power-On Reset		16-SOIC		Active High/Active Low	85 °C	-40 °C	1	Push-Pull	16-SOIC	Surface Mount	0.295 in	7.5 mm
Analog Devices ADM698ARZ	140 ms	Simple Reset/Power-On Reset		16-SOIC		Active High/Active Low	85 °C	-40 °C	1	Push-Pull	16-SOIC	Surface Mount	0.295 in	7.5 mm
Analog Devices ADM698ANZ	140 ms	Simple Reset/Power-On Reset	0.3 in	8-DIP	7.62 mm	Active High/Active Low	85 °C	-40 °C	1	Push-Pull	8-PDIP	Through Hole
Analog Devices ADM698AR-REEL	140 ms	Simple Reset/Power-On Reset		16-SOIC		Active High/Active Low	85 °C	-40 °C	1	Push-Pull	16-SOIC	Surface Mount	0.295 in	7.5 mm
Analog Devices ADM698ARZ-REEL	140 ms	Simple Reset/Power-On Reset		16-SOIC		Active High/Active Low	85 °C	-40 °C	1	Push-Pull	16-SOIC	Surface Mount	0.295 in	7.5 mm

Catalog

Microprocessor Supervisory Circuit

Key Features

• Superior Upgrade for MAX698/MAX699

• GuaranteedRESETAssertion with VCC= 1 V

• Low 0.6 mA Supply Current

• Precision 4.65 V Voltage Monitor

• Power OK/Reset Time Delay

• Watchdog Timer

• Minimum Component Count

• Performance Specified over Temperature

Description

The ADM698 /ADM699supervisory circuits provide power supply monitoring and watchdog timing for microprocessor systems.The ADM698 monitors the 5 V VCCpower supply and generates aRESETpulse during power up, power down and during low voltage "Brown Out" conditions. TheRESEToutput is guaranteed to be functional (logic low) with VCCas low as 1 V.The ADM699 features an identical monitoring circuit as in the ADM698 plus an additional watchdog timer input to monitor microprocessor activity. TheRESEToutput is forced low if the watchdog input is not toggled within the 1 second watchdog timeout period.Both parts are available in 8-pin plastic DIP and 16-lead SOIC packages. The 16-lead SOIC contains additional outputsRESET(without inversion) and Watchdog OutputWDO(ADM699 only).