Diodes Incorporated

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Back to MicroProcessor Supervisory IC / Reset IC / Voltage Detector

PT7M824 (Not Recommended for New Design (NRND))

NRND = Not Recommended for New Design

Micro-processor (µP) Supervisory Circuits

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The PT7M823/824/825 family micro-processor (μP) supervisory circuits are targeted to improve reliability and accuracy of powersupply 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. Watchdog functions
3. Manual reset


  • Precision Supply-Voltage Monitor
  • 4.63V (PT7M82xL)
  • 4.38V (PT7M82xM)
  • 3.08V (PT7M82xT)
  • 2.93V (PT7M82xS)
  • 2.63V (PT7M82xR)
  • 2.32V (PT7M82xZ)
  • 2.19V (PT7M82xY)
  • 200ms Reset Pulse Width
  • Debounced CMOS-Compatible Manual-Reset Input (PT7M823/825)
  • Reset Output Signal for Watchdog and Power Abnormal, Manual Reset
  • Reset Push-Pull Output
  • Voltage Monitor for Power-Fail or Low Battery Warning
  • Guaranteed RESET/RESET Valid at VCC = 1V
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)


  • Power-Supply Circuitry in μP System
  • Networking
  • Security System
  • Server/Storage
  • Embedded System

Product Specifications

Product Parameters

Fixed Detect Voltages (V) 2.19, 2.32, 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) 1 V
Maximum Input Voltage (V) 5.5 V
Quiescent Current (µA) 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) Yes (Active Low)
Manual RESET No
Watchdog Yes
Watchdog Time (s) 1.6 s
Power Fail Comparator Threshold (V) N/A 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

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site