The ADM698/ADM699 supervisory circuits provide power supply monitoring and watchdog timing for microprocessor systems.

The ADM698 monitors the 5 V V_CC power supply and generates a RESET pulse during power up, power down and during low voltage "Brown Out" conditions. The RESET output is guaranteed to be functional (logic low) with V_CC as 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. The RESET output 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 outputs RESET (without inversion) and Watchdog Output WDO (ADM699 only).

Part#	Reset Threshold Summary	Min Reset Timeout (ms)	Reset Output-Stage	Manual Reset Capability	Typ Watchdog Timeout (ms)	Power Fail Indicator	Package	Product Description	Price* (1000-4999)
AD5100	Programmable	Adj	Active-Low/Push-Pull	Yes	adj.	Yes	SOP	System-Mgmt IC with Programmable Quad Voltage Monitoring and Supervisory Functions	$1.60
ADM1232	4.37V & 4.62V	250	Active-High/Push-Pull, Active-Low/Open-Drain	Yes	250, 500, 62.5	No	DIP, SOIC, SOP	Microprocessor Supervisory Circuit	$0.95
ADM13305	5 Options--0.6Adj to 4.55	140	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	1.6	-	SOIC	Dual Processor Supervisor with Watchdog	$0.96
ADM6316	26 Options--2.5 to 5V	1, 1,200, 140, 20	Active-Low/Push-Pull	Yes	102, 1,600, 25,600, 6.3	No	SOT	Supervisory Ckt w/ Watchdog, Manual Reset & Active-Low, Push-Pull Reset Output in 5-Lead SOT-23	$0.51
ADM6318	26 Options--2.5 to 5V	1, 1,200, 140, 20	Active-High/Push-Pull, Active-Low/Push-Pull	No	102, 1,600, 25,600, 6.3	No	SOT	Supervisory Circuit with Watchdog and Dual Active-Low/Active-High Push-Pull Reset Outputs	$0.50
ADM6320	26 Options--2.5 to 5V	1, 1,200, 140, 20	Active-Low/Open-Drain	Yes	102, 1,600, 25,600, 6.3	No	SOT	Supervisory Circuit with Watchdog, Manual Reset & Active-Low, Open-Drain Reset Output	$0.51
ADM6321	26 Options--2.5 to 5V	1, 1,200, 140, 20	Active-High/Push-Pull, Active-Low/Open-Drain	No	102, 1,600, 25,600, 6.3	No	SOT	Supervisory Circuit with Watchdog and Dual Active-Low Open-Drain/Active-High Push-Pull Reset Outputs	$0.51
ADM6821	9 Options--1.58 to 4.63V	140	Active-High/Push-Pull	Yes	1,600	No	SOT	Low Voltage Supervisory Circuit w/ Watchdog, Manual Reset and Active-High, Push-Pull Reset Output	-
ADM6822	9 Options--1.58 to 4.63V	140	Active-Low/Open-Drain	Yes	1,600	No	SOT	Low Voltage Supervisory Circuit w/ Watchdog, Manual Reset and Open-Drain Reset Output	-
ADM6823	9 Options--1.58 to 4.63V	140	Active-Low/Push-Pull	Yes	1,600	No	SOT	Low Voltage Supervisory Circuit w/ Watchdog, Manual Reset and Active-Low, Push-Pull Reset Output	$0.76
ADM6824	9 Options--1.58 to 4.63V	140	Active-High/Push-Pull, Active-Low/Push-Pull	No	1,600	No	SOT	Low Voltage Supervisory Circuit w/ Watchdog, Manual Reset, Active-Hi & Low Push-Pull Reset Output	-
ADM699	4.65V	140	Active-High/Push-Pull, Active-Low/Push-Pull	No	1,600	No	DIP, SOIC	µP Supv w/ Watchdog, 4.65V Trip Point, Low Supply Current and Active Low Reset Output	$1.68
ADM705	4.65V	160	Active-Low/Push-Pull	Yes	1,600	Yes	DIP, SOIC	µP Supv w/ 4.65V Trip Voltage, Watchdog, Pwr Fail, Manual Reset & Active Low Reset Output	$1.02
ADM706	4.4V	160	Active-Low/Push-Pull	Yes	1,600	Yes	DIP, SOIC	+3V, Voltage Monitoring µP Supervisory Circuit	$1.70
ADM823	7 Options--2.19 to 4.63V	140	Active-Low/Push-Pull	Yes	1,600	No	SC70, SOT	Supervisory Circuit with Watchdog, Manual Reset and Active-Low, Push-Pull Reset Output	$0.51
ADM824	7 Options--2.19 to 4.63V	140	Active-High/Push-Pull, Active-Low/Push-Pull	No	1,600	No	SC70, SOT	Supervisory Circuit with Watchdog, Active-High &-Low Push-Pull Reset Output	$0.51
ADM8616	9 Options--1.58 to 4.63V	1, 1,120, 140, 20	Active-Low/Push-Pull	No	102, 1,600, 6.3	No	SC70	Low Voltage Supervisory Circuit w/ Watchdog and Active-Low, Push-Pull Reset Output--- in 4-Lead SC70	$0.86
ADM8617	9 Options--1.58 to 4.63V	1, 1,120, 140, 20	Active-Low/Open-Drain	No	102, 1,600, 6.3	No	SC70	Low Voltage Supervisory Circuit w/ Watchdog & active-low open-drain output in 4-Lead SC70	$0.86
ADM8699	4.65V	140	Active-High/Push-Pull, Active-Low/Push-Pull	No	1,600	No	DIP, SOIC	µP Supervisory Circuit with Watchdog, 4.65V Trip Point	$2.01
ADM9690	4.31V	10 typ, 50 typ	Active-Low/Push-Pull	No	0.75, 1.5, 12.5, 25	No	SOIC	Power Supply and Watchdog Timer Monitoring Circuit	$1.52

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
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