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ADM825:  Supervisory Circuit with Watchdog and Manual Reset in 5-Lead SC70 and SOT-23

Product Details


The ADM823/ADM824/ADM825 are supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. In addition to providing power-on reset signals, an on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period. A reset signal can also be asserted by an external push-button, through a manual reset input. The three parts feature different combinations of watchdog input, manual reset input, and output stage configuration, as shown in Table 1.

These parts are available in a choice of seven reset threshold options ranging from 2.19 V to 4.63 V. The reset and watchdog timeout periods are fixed at 140 ms (minimum) and 1.6 sec (typical), respectively.

The ADM823/ADM824/ADM825 are available in 5-lead SC70 and SOT-23 packages and typically consume only 5 μA, making them suitable for use in low power, portable applications.

Applications

  • Microprocessor systems
  • Computers
  • Controllers
  • Intelligent instruments
  • Portable equipment

FEATURES and BENEFITS

  • Precision 2.5 V to 5 V power supply monitor
  • 7 reset threshold options: 2.19 V to 4.63 V
  • 140 ms (minimum) reset timeout
  • Manual reset input (ADM823, ADM825)
  • Push-pull output stages
    RESET (ADM823)
    RESET, RESET (ADM824/ADM825)
  • Watchdog timer with 1.6 sec timeout (ADM823, ADM824)
  • Low power consumption (5 μA)
  • See Data Sheet for Additional Information

Pin Configuration Diagram for ADM825

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.

SampleSample & Buy

Price, packaging, availability

ADM825 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM825LYRJ-R7 Status: Last Time Buy 5 ld SOT-23 5 Ind Reel, 3000 - $0.59 N  Material Info PCN/PDN Purchase Sample
ADM825LYRJZ-R7 Status: Production 5 ld SOT-23 5 Ind Reel, 3000 - $0.51 Y  Material Info PCN Purchase Sample
ADM825MYKSZ-R7 Status: Contact ADI SC-70 5 Comm. Reel, 3000 - $0.56 Y  Material Info Notify Me Purchase
ADM825MYRJ-R7 Status: Production 5 ld SOT-23 5 Ind Reel, 3000 - $0.56 N  Material Info PCN Purchase Sample
ADM825RYRJ-R7 Status: Last Time Buy 5 ld SOT-23 5 Ind Reel, 3000 - $0.59 N  Material Info PCN/PDN Purchase Sample
ADM825RYRJZ-R7 Status: Production SOT23 5/6/8 Leads 5 Ind Reel, 3000 - $0.51 Y  Material Info PCN Purchase
ADM825SYKSZ-R7 Status: Production 5 ld SC70 5 Ind Reel, 3000 - $0.51 Y  Material Info Notify Me Purchase
ADM825SYRJ-R7 Status: Last Time Buy 5 ld SOT-23 5 Ind Reel, 3000 - $0.59 N  Material Info PCN/PDN Purchase
ADM825SYRJZ-R7 Status: Production 5 ld SOT-23 5 Ind Reel, 3000 - $0.51 Y  Material Info PCN Purchase Sample
ADM825TYKSZ-R7 Status: Production 5 ld SC70 5 Ind Reel, 3000 - $0.51 Y  Material Info Notify Me Purchase
ADM825TYRJ-R7 Status: Last Time Buy 5 ld SOT-23 5 Ind Reel, 3000 - $0.59 N  Material Info PCN/PDN Purchase Sample
ADM825TYRJZ-R7 Status: Production 5 ld SOT-23 5 Ind Reel, 3000 - $0.51 Y  Material Info PCN Purchase
ADM825ZYKSZ-R7 Status: Production 5 ld SC70 5 Ind Reel, 3000 - $0.51 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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