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PT7A7531

Description
uP Supervisor Circuits
File Size323KB,9 Pages
ManufacturerPericom Semiconductor Corporation (Diodes Incorporated)
Websitehttps://www.diodes.com/
Download Datasheet View All

PT7A7531 Overview

uP Supervisor Circuits

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PT7A7511-15/7521-25/7531-35
μP Supervisor Circuits
Features
Description
The PT7A751X/752X/753X family micro-
processor (P) supervisory circuits are targeted to
improve reliability and accuracy of power-supply
circuitry in
P’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
P
system.
2. Detecting power failure or low-battery
conditions with a 1.25V threshold detector.
3. Watchdog functions (not for PT7A753x)
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
Application
Power-supply circuitry in
P
systems
Guaranteed RESET/RESET valid at V
CC
=1.2V
Pin Configuration
PT7A7511P-7515P
PT7A7511W-7515W
8-Pin PDIP/8-Pin SOIC
MR
V
CC
GND
PFI
1
2
3
4
8
7
6
5
WDO
RESET
WDI
PFO
MR
V
CC
GND
PFI
PT7A7521P-7525P
PT7A7521W-7525W
8-Pin PDIP/8-Pin SOIC
1
2
3
4
8
7
6
5
WDO
RESET
WDI
PFO
MR
V
CC
GND
PFI
PT7A7531P-7535P
PT7A7531W-7535W
8-Pin PDIP/8-Pin SOIC
1
2
3
4
8
7
6
5
RESET
RESET
NC
PFO
Top View
12-07-0002
1
PT0082-7
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