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SO 8

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PT7A753x

Power-supply circuitry in

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Overview

Description

The PT7A751X/752X/753X family microprocessor
(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 PT7A753x)

Applications

  • Power-supply circuitry in µP systems

Features

  • Precision supply-voltage monitor
    - 4.63V (PT7A7511, 7521, 7531)
    - 4.38V (PT7A7512, 7522, 7532)
    - 3.08V (PT7A7513, 7523, 7533)
    - 2.93V (PT7A7514, 7524, 7534)
    - 2.63V (PT7A7515, 7525, 7535)
  • 200ms reset pulse width
  • Debounced TTL/CMOS-compatible manual reset input
  • Independent watchdog timer 1.6sec time-out (not available for PT7A7531 - 7535)
  • Reset output signal:
    - Active-low only (PT7A7511 - 7515)
    - Active-high only (PT7A7521 - 7525)
    - Active-high and active-low (PT7A7531 - 7535)
  • Voltage monitor for power-fail or low battery warning
  • Guaranteed RESET/RESET valid at VCC=1.2V

Specifications & Technical Documents

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)

Vd+10% V

Maximum Input Voltage (V)

5.5 V

Quiescent Current (µA)

30 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

Yes

Watchdog

No

Watchdog Time (s)

None s

Power Fail Comparator Threshold (V)

1.25 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

Purchase & Availability

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-2770 2025-10-30 2025-10-30 Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products