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PT7M7823R Datasheet(PDF) 1 Page - Pericom Semiconductor Corporation

Part # PT7M7823R
Description  Precision supply-voltage monitor
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Manufacturer  PERICOM [Pericom Semiconductor Corporation]
Direct Link  http://www.pericom.com
Logo PERICOM - Pericom Semiconductor Corporation

PT7M7823R Datasheet(HTML) 1 Page - Pericom Semiconductor Corporation

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µP Supervisor Circuits
PT0109S-15
10/14/10
1
PT7M7803/7809-7812/7823-7825
Features
Precision supply-voltage monitor
-
4.63V (PT7M78xxL)
-
4.38V (PT7M78xxM except PT7M7803/09/10M)
-
3.08V (PT7M78xxT)
-
2.93V (PT7M78xxS)
-
2.63V (PT7M78xxR)
-
2.32V (PT7M78xxZ)
-
2.20V (PT7M78xxY)
-
4.00V (PT7M78xxJ)
-
4.26V (PT7M7803/09/10M)
-
2.25V (PT7M7823/24K)
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
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.
Applications
Power-supply circuitry in
µP systems
Monitored Voltage Table
X
L
M
1)
T
S
R
Z
Y
J
K
2)
Reset Threshold (V)
4.63
4.38
3.08
2.93
2.63
2.32
2.20
4.00
2.25
Note1): Threshold voltage=4.38V can be applied to all parts except PT7M7803/09/10M. PT7M7803/09/10M’s threshold voltage
is 4.26V.
2): Threshold voltage=2.25V only for PT7M7823/24K.
Function Comparison
RESET output
Part No.
Push-Pull
Open-Drain
RESET
output
(push-pull)
Manual Reset
Input
Power Fail
Detector
(1.25V)
Watchdog
Input
1
PT7M7803
-
-
-
-
-
2
PT7M7809
-
-
-
-
-
3
PT7M7810
-
-
-
-
-
4
PT7M7811
-
-
-
-
5
PT7M7812
-
-
-
-
6
PT7M7823
-
-
-
7
PT7M7824
-
-
-
8
PT7M7825
-
-
-
11-0012


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