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电源管理IC微处理器监控电路 PT7M7809

微处理器监控电路 IC

PT7M7809x

Push-pull Reset output and SOT23-3 supervisory IC

PT7N7809STEX B图.jpg

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 Parameters

Fixed Detect Voltages

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

N/A V

Number of Channels

1

Minimum Operating Voltage

1 V

Maximum Input

5.5 V

Quiescent Current

10 µA

Typical Time Delay

N/A µs

Reset Period

200 ms

RESET Output (Active High)

No (Active High)

RESET Output (Active Low)

Yes (Active Low)

Manual RESET

No

Watchdog

No

Watchdog Time

None s

Power Fail Comparator Threshold

None V

Reset Output Topology

Push-Pull

Ambient Temperature Range

-40 to 85

Related Content

Packages

SOT23

  

 


 

Applications

医疗, 数字相机, 机顶盒, 平板计算机

 

 

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