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PT0109(10/10)

Ver: 15

1

Data Sheet

PT7M7803/7809-7812/7823-7825

µP Supervisor Circuits

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

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

Ordering Information

Part Number

Package

Part Number

Package

PT7M7803XTE

Lead free and Green SOT23-3

PT7M7824XTAE

Lead free and Green SOT23-5

PT7M7809XTE

Lead free and Green SOT23-3

PT7M7825XTAE

Lead free and Green SOT23-5

PT7M7810XTE

Lead free and Green SOT23-3

PT7M7811XTBE

Lead free and Green SOT143

PT7M7811XTAE

Lead free and Green SOT23-5

PT7M7812XTBE

Lead free and Green SOT143

PT7M7812XTAE

Lead free and Green SOT23-5

PT7M7809XUWF

Wafer form

PT7M7823XTAE

Lead free and Green SOT23-5

Note: “X” refers to voltage range, see below table.

Suffix: X—Monitored Voltage

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.