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ADM8690:  Microprocessor Supervisory Circuit, 8-Pin DIP

Product Details

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 VCC 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 VCC status outputs.


  • Upgrade for the ADM690, ADM691, ADM695 and for the MAX690, MAX691, MAX695
  • Specified over temperature
  • Low power consumption: 0.7 mW
  • Precision voltage monitor
  • Reset assertion down to 1 V VCC
  • Low switch on resistance: 0.7 Ω normal, 7 Ω in backup
  • High current drive: 100 mA
  • Watchdog timer: 100 ms, 1.6 sec, or adjustable
  • Standby current: 400 nA
  • Automatic battery backup power switching
  • Extremely fast gating of chip enable signals (3 ns)
  • Voltage monitor for power fail
  • Available in TSSOP package

Functional Block Diagram for ADM8690


Title Content Type File Type
ADM8690/ADM8691/ADM8695: Microprocessor Supervisory Circuits Data Sheet (Rev C, 12/2011) (pdf, 357 kB) Data Sheets PDF
Supervisory Devices Complementary Parts Guide for Altera FPGAs  (pdf, 664 kB) Product Selection Guide PDF
Supervisory Devices Complementary Parts Guide for Xilinx FPGAs  (pdf, 661 kB) Product Selection Guide PDF
Voltage Monitoring Products Applications Guide  (pdf, 1808 kB) Solutions Bulletins PDF
Voltage Monitoring and Sequencing (2009/2010)  (pdf) Overview PDF
Voltage Monitoring Products 2008  (pdf, 3930 kB) Overview PDF
Power System Management (Spring 2007)  (pdf, 1170 kB) Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

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Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

ADM8690 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADM8690AN Status: Last Time Buy 8 ld PDIP 8 Ind Tube, 50 $3.22 $2.91 N  Material Info PCN/PDN Purchase
ADM8690ANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $2.86 $2.60 Y  Material Info PCN Purchase
ADM8690ARN Status: Last Time Buy 8 ld SOIC 8 Comm. Tube, 98 $3.22 $2.91 N  Material Info PDN Purchase
ADM8690ARN-REEL Status: Last Time Buy 8 ld SOIC 8 Comm. Reel, 2500 - $2.91 N  Material Info PDN Purchase
ADM8690ARNZ Status: Production 8 ld SOIC 8 Comm. Tube, 98 $2.78 $2.52 Y  Material Info Notify Me Purchase
Price Table Help

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.

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