Diodes Menu Close
Back to MicroProcessor Supervisory IC / Reset IC / Voltage Detector

PT7M7809x

Push-pull Reset output and SOT23-3 supervisory IC

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.

Product Description

The PT7M78xx family microprocessor (µP) supervisory circuits are targeted to improve reliability and accuracy of power-supply circuitry in µP 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
  4. Manual reset.

Features

  • Precision supply-voltage monitor
    • 4.63V (PT7M78xxL)
    • 4.38V (PT7M78xxM)
    • 3.08V (PT7M78xxT)
    • 2.93V (PT7M78xxS)
    • 2.63V (PT7M78xxR)
    • 2.32V (PT7M78xxZ)
    • 2.20V (PT7M78xxY)
    • 4.00V (PT7M78xxJ)
    • 2.25V (PT7M78xxK)
    • 2.80V (PT7M78xxG)
  • 200ms reset pulse width
  • Debounced CMOS-compatible manual-reset input (7811, 7812, 7823, 7825)
  • Reset Output Signal for Watchdog and Power
  • Abnormal, Manual Reset
  • Reset Push-Pull output (PT7M7809,7811,7823,7824,7825)
  • Reset Open-Drain output (PT7M7803)
  • Voltage monitor for power-fail or low battery warning
  • Guaranteed RESET/RESET valid at VCC=1.0V

Applications

  • Power-supply circuitry in µP systems
  • Networking
  • Security System
  • Server/Storage
  • Embedded System

Product Specifications

Product Parameters

Fixed Detect Voltages (V) 2.2, 2.25, 2.32, 2.63, 2.80, 2.93, 3.08, 4, 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 (mA) 10 µA
Typical Time Delay (µs) N/A µs
Reset Period (ms) 200 ms
RESET Output (Active High) No (Active High)
RESET Output (Active Low) Yes (Active Low)
Manual RESET No
Watchdog No
Watchdog Time (s) None s
Power Fail Comparator Threshold (V) None V
Reset Output Topology Push-Pull
Ambient Temperature Range  (°C) -40 to 85 °C

Related Content

Packages

Applications

Technical Documents

Recommended Soldering Techniques

TN1.pdf

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

Request Documents

FAQs

Related Application FAQs