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The PT7A7611-7615/7621-7625/7631-7635 family micro-processor (μP) supervisory circuits are targeted to improve reliability and accuracy of power-supply circuitry in μP’s systems. These devices reduce the complexity and number of components required to monitor power-supply and battery functions.

The main functions are:
1. Asserting reset output during power-up, power-down and brownout conditions for μP system.
2. Detecting power failure or low-battery conditions with a 1.25V threshold detector.
3. Watchdog functions (not for PT7A7631-7635).


  • Precision Supply-voltage Monitor
    • 4.63V (PT7A7611/7621/7631)
    • 4.38V (PT7A7612/7622/7632)
    • 3.08V (PT7A7613/7623/7633)
    • 2.93V (PT7A7614/7624/7634)
    • 2.63V (PT7A7615/7625/7635)
  • 200ms Reset Pulse Width
  • Debounced TTL/CMOS-compatible Manual-reset Input
  • Independent Watchdog Timer 1.6sec Time-out (Not Available for PT7A7631-7635)
  • Voltage Monitor for Power-fail or Low Battery Warning
  • Reset Output Signal:
    • Active-low Only (PT7A7611-7615)
    • Active-high Only (PT7A7621-7625)
    • Active-high and Active-low (PT7A7631-7635)
  • Guaranteed RESET/RESET Valid at VCC = 1V


  • Computers
  • Controllers
  • Intelligent Instruments
  • Critical μP and μC Power Monitoring
  • Portable/Battery Powered Equipment

Product Specifications

Product Parameters

Fixed Detect Voltages (V) 2.63, 2.93, 3.08, 4.38, 4.63 V
Adjustable Detect Voltage Reference Voltage (V) N/A V
Number of Channels 1
Minimum Operating Voltage (V) 2.7 V
Maximum Input Voltage (V) 5.5 V
Quiescent Current (mA) 10 µA
Typical Time Delay (µs) N/A µs
Reset Period (ms) 200 ms
RESET Output (Active High) Yes (Active High)
RESET Output (Active Low) No (Active Low)
Manual RESET Yes
Watchdog Yes
Watchdog Time (s) 1.6 s
Power Fail Comparator Threshold (V) 1.25 V
Reset Output Topology Push-Pull
Ambient Temperature Range  (°C) -40 to 85 °C

Related Content



Technical Documents

Recommended Soldering Techniques


Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents

Request Documents


Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
Contact Sales
Request Samples
Qty. Carrier
PT7A7623M8-13 Active MSOP-8 GREEN 2500 T&R Contact Sales Request Sample
PT7A7623S-13 Active SO-8 GREEN 2500 T&R Contact Sales Request Sample

Environmental Compliance Legend:
LFF: Pb-Free Finish and RoHS 5/6
TLFP: Totally Pb-Free Product and RoHS 6/6
LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free
TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free
GREEN: Halogen-free and RoHS compliant
RoHS: RoHS compliant but NOT halogen-free


Product Change Notices

PCN # Issue Date Implementation Date Subject
PCN-2555 2021-11-11 2022-05-11 Device End of Life (EOL)


Related Application FAQs