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 (V)	Min Reset Timeout (ms)	Reset Output-Stage	Manual Reset Capability	Package	Price* (1000-4999)
ADM1810	4.35, 4.62	100	Active-Low/Push-Pull	No	SC70, SOT	$0.45
ADM1811	4.35, 4.62	100	Active-Low/Int-Pullup	No	SC70, SOT	$0.45
ADM1812	4.35, 4.62	100	Active-High/Push-Pull	No	SC70, SOT	$0.45
ADM1813	4.35, 4.62	100	Active-Low/Int-Pullup	Yes	SC70, SOT	$0.39
ADM1815	2.18, 2.31, 2.55, 2.88, 3.06	100	Active-High/Push-Pull	No	SC70, SOT	$0.39
ADM1816	2.18, 2.31, 2.55, 2.88, 3.06	100	Active-Low/Int-Pullup	No	SC70, SOT	$0.45
ADM1817	2.18, 2.31, 2.55, 2.88, 3.06	100	Active-High/Push-Pull	No	SC70, SOT	$0.45
ADM1818	2.18, 2.31, 2.55, 2.88, 3.06	100	Active-Low/Int-Pullup	Yes	SC70, SOT	$0.44
ADM6315	2.63, 2.93, 3.08, 4.39, 4.5, 4.63	1, 1,120, 140, 20	Active-Low/Open-Drain	Yes	SOT	$0.80
ADM6319	2.5, 2.63, 2.7, 2.8, 2.93, 3.0, 3.08, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.39, 4.5, 4.63, 4.7, 4.8, 4.9, 5.0	1, 1,120, 140, 20	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	SOT	$0.50
ADM6322	2.5, 2.63, 2.7, 2.8, 2.93, 3.0, 3.08, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.39, 4.5, 4.63, 4.7, 4.8, 4.9, 5.0	1, 1,200, 140, 20	Active-High/Push-Pull, Active-Low/Open-Drain	Yes	SOT	$0.50
ADM6384	1.58, 1.67, 2.19, 2.31, 2.4, 2.5, 2.63, 2.7, 2.8, 2.93, 3.0, 3.08, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.39, 4.5, 4.63, 4.7, 4.8, 4.9, 5.0	1, 1,120, 140, 20	Active-Low/Push-Pull	Yes	SC70	$0.94
ADM6711	2.32, 2.63, 2.93, 3.08, 4.38, 4.63	140	Active-Low/Push-Pull	Yes	SC70	$0.26
ADM6713	2.32, 2.63, 2.93, 3.08, 4.38, 4.63	140	Active-Low/Open-Drain	Yes	SC70	$0.28
ADM6825	1.58, 1.67, 2.19, 2.32, 2.63, 2.93, 3.08, 4.38, 4.63	140	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	SOT	-
ADM698	4.65	140	Active-High/Push-Pull, Active-Low/Push-Pull	No	DIP, SOIC	$1.35
ADM707	4.65	160	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	DIP, SOIC	$0.96
ADM708	2.63, 2.93, 3.08, 4.4, 4.65	160	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	DIP, SOIC, SOP	$0.84
ADM709	2.63, 2.93, 3.08, 4.4, 4.65	140	Active-Low/Push-Pull	No	DIP, SOIC	$0.70
ADM803	2.32, 2.63, 2.93, 3.08, 4.38, 4.63	140	Active-Low/Open-Drain	No	SC70	$0.26
ADM809	2.32, 2.63, 2.93, 3.08, 4.0, 4.38, 4.63	140	Active-Low/Push-Pull	No	SC70, SOT	$0.61
ADM810	2.32, 2.63, 2.93, 3.08, 4.0, 4.38, 4.63	140	Active-High/Push-Pull	No	SC70, SOT	$0.60
ADM811	2.32, 2.63, 2.93, 3.08, 4.38, 4.63	140	Active-Low/Push-Pull	Yes	SOT	$0.45
ADM812	2.32, 2.63, 2.93, 3.08, 4.38, 4.63	140	Active-High/Push-Pull	Yes	SOT	$0.45
ADM825	2.19, 2.32, 2.63, 2.93, 3.08, 4.38, 4.63	140	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	SC70, SOT	$0.50
ADM8698	4.65	140	Active-High/Push-Pull, Active-Low/Push-Pull	No	DIP, SOIC	$1.99

* 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.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

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