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ADM800:  Microprocessor Supervisor , Adjustable Reset and Watchdog Periods

Product Details

The ADM691A/ADM693A/ADM800L/ADM800M 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 family of products provides an upgrade for the MAX691A/93A/800M family of products.

All parts are available in 16-pin DIP and SO packages. The ADM691A is also available in a space-saving TSSOP package. The following functionality is provided:

  • Power-on reset output during power-up, power-down and brownout conditions. The circuitry remains operational with VCC as low as 1 V.
  • Battery backup switching for CMOS RAM, CMOS micro-processor or other low power logic.
  • A reset pulse if the optional watchdog timer has not been toggled within a specified time.
  • A 1.25 V threshold detector for power fail warning, low battery detection, or to monitor a power supply other than +5 V.


  • Low Power Consumption
  • Precision Voltage Monitor
  • ±2% Tolerance on ADM800L/M
  • Reset Time Delay—200 ms, or Adjustable
  • 1 µA Standby Current
  • Automatic Battery Backup Power Switching
  • Fast Onboard Gating of Chip Enable Signals
  • Also Available in TSSOP Package (ADM691A)

Functional Block Diagram for ADM800


Title Content Type File Type
ADM691A/ADM693A/ADM800: Microprocessor Supervisory Circuit Data Sheet  (Rev 0, 09/2002) (pdf, 339 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

Title Content Type File Type
Supervisor Parametric Search
Narrow down the thousands of available supervisors using parameters applicable to your application.
ADIsim Design/Simulation Tools HTML

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.

SampleSample & Buy

Price, packaging, availability

ADM800 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADM800MARN Status: Production 16 ld SOIC 16 Ind Tube, 48 $2.92 $2.69 N  Material Info PCN Purchase
ADM800MARNZ Status: Production 16 ld SOIC 16 Ind Tube, 48 $2.53 $2.33 Y  Material Info PCN Purchase
ADM800MARNZ-REEL Status: Production 16 ld SOIC 16 Ind Reel, 2500 - $2.33 Y  Material Info PCN 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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