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ADM705:  Low Cost Microprocessor Supervisory Circuit

Product Details


The ADM705/ADM706/ADM707/ADM708 microprocessor supervisory circuits are suitable for monitoring 5 V power supplies/batteries and can also monitor microprocessor activity.

The ADM705/ADM706 provide power-supply monitoring circuitry that generate a reset output during power-up, power-down, and brownout conditions. The reset output remains operational with VCC as low as 1 V. Independent watchdog monitoring circuitry is also provided. This is activated if the watchdog input has not been toggled within 1.60 seconds.

In addition, there is a 1.25 V threshold detector to warn of power-failures, to detect low battery conditions, or to monitor an additional power supply. An active low, debounced manual reset input (MR) is also included.

The ADM705 and ADM706 are identical except for the reset threshold monitor levels, which are 4.65 V and 4.40 V, respectively.

The ADM707 and ADM708 provide a similar functionality to the ADM705 and ADM706 and only differ in that a watchdog timer function is not available. Instead, an active high reset output (RESET) is available as well as the active low reset output (RESET). The ADM707 and ADM708 are identical except for the reset threshold monitor levels, which are 4.65 V and 4.40 V, respectively.

All parts are available in narrow 8-lead PDIP and 8-lead SOIC packages. Applications

  • Microprocessor systems
  • Computers
  • Controllers
  • Intelligent instruments
  • Automotive systems
  • Critical microprocessor supply monitoring

FEATURES and BENEFITS

  • Guaranteed RESET valid with VCC = 1 V
  • 190 μA quiescent current
  • Precision supply voltage monitor
    4.65 V (ADM705/ADM707)
    4.40 V (ADM706/ADM708)
  • 200 ms reset pulse width
  • Debounced TTL/CMOS manual reset input (MR)
  • Independent watchdog timer (ADM705/ADM706)
  • 1.6 sec timeout (ADM705/ADM706)
  • Active high reset output (ADM707/ADM708)
  • Voltage monitor for power-fail or low battery warning
  • Superior upgrade for MAX705 to MAX708

Functional Block Diagram for ADM705

Documentation

Title Content Type File Type
ADM705/ADM706/ADM707/ADM708: Low Cost Microprocessor Supervisory Circuits Data Sheet (Rev G, 03/2008) (pdf, 485 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

ADM705 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM705AN Status: Production 8 ld PDIP 8 Ind Tube, 50 $1.48 $1.18 N  Material Info PCN Purchase
ADM705ANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $1.28 $1.02 Y  Material Info PCN Purchase Sample
ADM705AR Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.60 $1.18 N  Material Info PCN Purchase
ADM705AR-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $1.18 N  Material Info PCN Purchase
ADM705AR-REEL7 Status: Production SOIC 150 MIL 8 Ind Reel, 1000 - $1.18 N  Material Info PCN Purchase
ADM705ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.38 $1.02 Y  Material Info PCN Purchase Sample
ADM705ARZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $1.02 Y  Material Info PCN Purchase
ADM705ARZ-REEL7 Status: Production SOIC 150 MIL 8 Ind Reel, 1000 - $1.02 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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