The ADM8690–ADM8695 family of supervisory circuits offers complete single chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include mP reset, backup battery switchover, watchdog timer, CMOS RAM write protection and power failure warning. The complete family provides a variety of configurations to satisfy most microprocessor system requirements.

The ADM8690, ADM8692 and ADM8694 are available in 8-pin DIP packages and provide:

1. Power-on reset output during power-up, power-down and brownout conditions. The RESET output remains operational with V_CC as low as 1 V.
2. Battery backup switching for CMOS RAM, CMOS microprocessor or other low power logic.
3. A reset pulse if the optional watchdog timer has not been toggled within a specified time.
4. A 1.3 V threshold detector for power fail warning, low battery detection or to monitor a power supply other than +5 V.

The ADM8691, ADM8693 and ADM8695 are available in 16-pin DIP and small outline packages (including TSSOP) and provide three additional functions:

1. Write protection of CMOS RAM or EEPROM.
2. Adjustable reset and watchdog timeout periods.
3. Separate watchdog timeout, backup battery switchover, and low V_CC status outputs.

Part#	Reset Threshold (V)	Min Reset Timeout (ms)	Reset Output-Stage	Backup-Battery Switch	Chip Enable Gating	Typ Watchdog Timeout (ms)	Package	Product Description	Price* (1000-4999)
ADM690	4.65	35	Active-Low/Push-Pull	Yes	---	100, 1,600	DIP	Supervisory Circuit w/ 4.65V Reset, Battery Switchover, Watchdog Timer, Power Fail Input	$2.39
ADM690A	4.65	140	Active-Low/Push-Pull	Yes	---	1,600	DIP, SOIC, SOP	µP Supervisor with Backup-Battery Switchover, Watchdog Feature, Power-Fail Warning, 4.65V Threshold	$1.50
ADM691	4.65	35 (Adjustable)	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	Yes	100, 1,600, adj.	DIP, SOIC	Microprocessor Supervisor w/ Watchdog Timer, Reset Generator and Battery Steering	$2.70
ADM691A	4.65	140 (Adjustable)	Active-High/Open-Drain, Active-Low/Push-Pull	Yes	Yes	100, 1,600, adj.	DIP, SOIC, SOP	µP Supervisor with Battery Backup, Watchdog, Power Fail Indicator & Reset Generator	$1.66
ADM692	4.4	35	Active-Low/Push-Pull	Yes	---	100, 1,600, adj.	DIP	µP Supervisor with Backup Battery Switchover, Watchdog, Power Fail Warning, Reset Generator	$2.39
ADM692A	4.4	140	Active-Low/Push-Pull	Yes	---	1,600	DIP, SOIC	µP Supervisor w/ Battery Steering, Watchdog, Pwr Fail Warning, Active Low Reset, 250mA Iout	$1.66
ADM693	4.4	35 (Adjustable)	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	Yes	100, 1,600, adj.	DIP, SOIC	µP Supervisor with Backup Battery Switchover, Watchdog, Pwr Fail Warning, 4.4V Threshold, 100mA	$2.70
ADM693A	4.4	140 (Adjustable)	Active-High/Open-Drain, Active-Low/Push-Pull	Yes	Yes	100, 1,600, adj.	DIP, SOIC	µP Supervisor w/ Backup Battery Switchover, Watchdog, Pwr Fail Warning, 4.4V Threshold, 250mA Iout	$1.83
ADM694	4.65	140	Active-Low/Push-Pull	Yes	---	100, 1,600, adj.	DIP	µP Supervisor w/ Backup Battery Switching, Watchdog, Power Fail Flag, 4.65V Vth, 100mA Iout	$2.50
ADM695	4.65	140 (Adjustable)	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	Yes	100, 1,600, adj.	DIP, SOIC	µP Supv w/ Backup Batt Ckt, Adj RST Period, Adj Watchdog Period, CE Inputs, 4.65V Vth, 100 mA Iout	$2.70
ADM696	1.3, Adjustable	35	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	---	100, 1,600, adj.	DIP, SOIC	µP Supv w/ Backup Battery Switchover, Adj Low Line V Monitor, Adj Watchdog Timer, 100 mA Iout	$2.60
ADM697	1.3, Adjustable	35	Active-High/Push-Pull, Active-Low/Push-Pull	No	Yes	100, 1,600, adj.	DIP, SOIC	µP Supv with CE Inputs, Adj Low Line V Monitor, Adj W-dog Timer, Low Line, Pwr Fail & W-dog Status	$2.60
ADM800	4.3, 4.55	140 (Adjustable)	Active-High/Open-Drain, Active-Low/Push-Pull	Yes	Yes	100, 1,600, adj.	DIP, SOIC	µP Supv w/ Backup Battery Switchover, Adj Reset &Watchdog Periods, CE Inputs, 4.4V/4.65V Threshold	$2.30
ADM802	4.4, 4.65	140	Active-Low/Push-Pull	Yes	---	1,600	DIP, SOIC	µP Supv w/ Backup Battery Switchover, Power Fail Flag, 4.4V/4.65V Threshold, 250mA Output Current	$2.20
ADM805	4.4, 4.65	140	Active-High/Push-Pull	Yes	---	1,600	DIP, SOIC	µP Supv w/ Backup Battery Switchover, Watchdog, Power Fail Flag, 4.4V/4.65V Threshold, 250mA Iout	$2.20
ADM8690	4.65	35	Active-Low/Push-Pull	Yes	---	100, 1,600	DIP, SOIC	uP Supv Ckt, Watchdog Timer, Backup Battery Switching, 4.65V Reset Trip Voltage, 8-Pin DIP & SOIC	$2.49
ADM8691	4.65	35 (Adjustable)	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	Yes	100, 1,600, adj.	DIP, SOIC, SOP	µP Supv w/ Backup Batt Switch, Adj Reset Period, Adj Watchdog Period, 4.65V Trip point, 100 mA Iout	$2.98
ADM8692	4.4	35	Active-Low/Push-Pull	Yes	---	100, 1,600	DIP, SOIC	µP Supv w/ Backup Battery Switch, Watchdog, Power Fail Flag, 4.4V Vth, Active Low Reset, 100mA Iout	$2.69
ADM8693	4.4	35 (Adjustable)	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	Yes	100, 1,600, adj.	DIP, SOIC, SOP	µP Supervisor w/ Backup Battery Switching, Watchdog, Pwr Fail Flag, 4.4V Vth, 100mA Iout	$2.69
ADM8694	4.65	140	Active-Low/Push-Pull	Yes	---	100, 1,600	DIP, SOIC	µP Supervisor w/ Backup Battery Switch, Watchdog, Pwr Fail Flag, 4.65V Vth, 100mA Iout	$2.69
ADM8695	4.65	140 (Adjustable)	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	Yes	100, 1,600, adj.	DIP, SOIC	µP Supervisor w/ Backup Battery Switch, Adj Reset Period, Adj Watchdog Period, 4.65V Trip Voltage	$2.16
ADM8696	1.3, Adjustable	35 (Adjustable)	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	---	100, 1,600, adj.	DIP, SOIC, SOP	µP Supv w/ Backup Batt Switch, Adj Low Line V Monitor, Adj Watchdog Timer, Pwr Fail& Watchdog Status	$2.69
ADM8697	1.3, Adjustable	35 (Adjustable)	Active-High/Push-Pull, Active-Low/Push-Pull	No	Yes	100, 1,600, adj.	DIP, SOIC, SOP	µP Supv w/ CE Inputs, Adj Low Line V Monitor, Adj Watchdog Timer; Low Line, Pwr Fail&Watchdog Status	$2.69

* 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.

The model number is a specific version of a generic that can be purchased or sampled.

Status indicates the current lifecycle of the product. This can be one of 4 stages:

• Pre-Release: The model has not been released to general production, but samples may be available.
• Production: The model is currently being produced, and generally available for purchase and sampling.
• Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
• Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).

The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.

Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.