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ADM708:  3 V, Voltage Monitoring Microprocessor Supervisory Circuit

Product Status:Production
Data
Sheet
ADM708 Data Sheet Rev C, 05/2008 (pdf 398kB)
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Product Details

Product Status:Production
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The ADM706P/ADM706R/ADM706S/ADM706T and the ADM708R/ADM708S/ADM708T microprocessor supervisory circuits are suitable for monitoring either 3 V or 3.3 V power supplies.

The ADM706P/ADM706R/ADM706S/ADM706T 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 1.6 seconds.

In addition, there is a 1.25 V threshold detector for power-fail warning, low battery detection, or to monitor an additional power supply. An active low debounced MR input is also included.

The ADM706R, ADM706S, and ADM706T are identical except for the reset threshold monitor levels, which are 2.63 V, 2.93 V, and 3.08 V, respectively. The ADM706P is identical to the ADM706R in that the reset threshold is 2.63 V. It differs only in that it has an active high reset output.

The ADM708R/ADM708S/ADM708T provide similar functio-nality as the ADM706R/ADM706S/ADM706T and only differ in that a watchdog timer function is not available. Instead, an active high reset output (RESET) is provided in addition to the active low (RESET) output.

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

  • Microprocessor systems
  • Computers
  • Controllers
  • Intelligent instruments
  • Critical microprocessor monitoring
  • Automotive systems
  • Battery-operated systems
  • Portable instruments

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FEATURES and BENEFITS

  • Precision supply voltage monitor
    2.63 V (ADM706P, ADM706R, ADM708R)
    2.93 V (ADM706S, ADM708S)
    3.08 V (ADM706T, ADM708T)
  • 100 μA quiescent current
  • 200 ms reset pulse width
  • Debounced manual reset input (MR)
  • Independent watchdog timer 1.6 sec timeout (ADM706x)
  • Reset Output
    Active high (ADM706P)
    Active low (ADM706R/ADM706S/ADM706T)
    Both active high and active low (ADM708R/ADM708S/ADM708T)
  • Voltage monitor for power-fail or low battery warning
  • Guaranteed RESET valid with VCC = 1 V
  • Superior upgrade for MAX706P/R/S/T, MAX708R/S/T

Typical Application Circuit

ADM708 Typical Application Circuit
Typical Applications and Other Diagrams

Similar Products

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Of Note . . .

The ADM708R/S/T are also available which is identical to the ADM708 except for the reset threshold monitor levels. The ADM708R/S/T Data Sheet found under the "Additional Data Sheets" link explains the differences.

Documentation

Title Content Type File Type
ADM706/ADM708: 3 V, Voltage Monitoring Microprocessor Supervisory Circuits Data Sheet (Rev C, 05/2008) (pdf, 398 kB) Data Sheets PDF
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
Supervisory Devices Complementary Parts Guide for Altera FPGAs  (pdf, 664 kB) Solutions Bulletins PDF
Supervisory Devices Complementary Parts Guide for Xilinx FPGAs  (pdf, 661 kB) Solutions Bulletins 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

ADM708 Model Options
Model Package Pins Temp.
Range 		Packing,
Qty 		Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM708AN Status: Production 8 ld PDIP 8 Ind Tube, 50 $1.23 $0.98 N  Material Info PCN Purchase
ADM708ANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $1.06 $0.85 Y  Material Info PCN Purchase
ADM708AR Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.47 $1.11 N  Material Info PCN Purchase
ADM708AR-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $1.11 N  Material Info PCN Purchase
ADM708ARM Status: Production 8 ld MSOP 8 Ind Tube, 50 $1.23 $1.11 N  Material Info PCN Purchase
ADM708ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $1.06 $0.93 Y  Material Info PCN Purchase
ADM708ARMZ-REEL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $0.93 Y  Material Info PCN Purchase
ADM708ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.27 $0.96 Y  Material Info PCN Purchase
ADM708ARZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $0.96 Y  Material Info PCN Purchase
ADM708RANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $1.06 $0.85 Y  Material Info PCN Purchase
ADM708RAR Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.23 $0.98 N  Material Info PCN Purchase
ADM708RAR-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $0.98 N  Material Info PCN Purchase
ADM708RARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.06 $0.85 Y  Material Info PCN Purchase
ADM708RARZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $0.85 Y  Material Info PCN Purchase
ADM708SANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $1.06 $0.85 Y  Material Info PCN Purchase
ADM708SAR Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.23 $0.98 N  Material Info PCN Purchase
ADM708SAR-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $0.98 N  Material Info PCN Purchase
ADM708SARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.06 $0.85 Y  Material Info PCN Purchase
ADM708SARZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $0.85 Y  Material Info PCN Purchase
ADM708TAN Status: Production 8 ld PDIP 8 Ind Tube, 50 $1.23 $0.98 N  Material Info PCN Purchase
ADM708TANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $1.06 $0.85 Y  Material Info PCN Purchase
ADM708TAR Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.23 $0.98 N  Material Info PCN Purchase
ADM708TAR-REEL Status: Production SOIC 150 MIL 8 Comm. Reel, 2500 - $0.98 N  Material Info PCN Purchase
ADM708TARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.06 $0.85 Y  Material Info PCN Purchase
ADM708TARZ-REEL Status: Production SOIC 150 MIL 8 Comm. Reel, 2500 - $0.85 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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