M51957B Renesas Electronics Corporation., M51957B Datasheet

M51957B

Manufacturer Part Number

M51957B

Description

Manufacturer

Renesas Electronics Corporation.

Datasheet

1.M51957B.pdf (14 pages)

Specifications of M51957B

Case

ZIP

Date_code

2003

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Current page: 1 of 14
Download datasheet (180Kb)

M51957A,B/M51958A,B

Voltage Detecting, System Resetting IC Series

Description

M51957A,B/M51958A,B are semiconductor integrated circuits for resetting of all types of logic circuits such as CPUs,

and has the feature of setting the detection voltage by adding external resistance.

They include a built-in delay circuit to provide the desired retardation time simply by adding an external capacitor.

They fined extensive applications, including battery checking circuit, level detecting circuit and waveform shaping

circuit.

Features

• Few external parts

• Large delay time with a capacitor of small capacitance (td ≈ 100 ms, at 0.33 µF) (M51957, M51958)

• Low threshold operating voltage (Supply voltage to keep low-state at low supply voltage):

• Wide supply voltage range: 2 V to 17 V

• Wide application range

Application

• Reset circuit of Pch, Nch, CMOS, microcomputer, CPU and MCU, Reset of logic circuit, Battery check circuit,

Recommended Operating Condition

• Supply voltage range: 2 V to 17 V

Pin Arrangement

REJ03D0778-0200 Rev.2.00 Aug 20, 2007

Page 1 of 13

0.6 V (Typ) at R

switching circuit back-up voltage, level detecting circuit, waveform shaping circuit, delay waveform generating

circuit, DC/DC converter, over voltage protection circuit

M51957AL/BL

M51958AL/BL

Outline: 5P5T

(Top view)

= 22 kΩ

Output

Delay capacitor

GND

Input

Power-supply

Input

GND

NC: No Connection

Outline: PRSP0008DE-C (recommend)

PRSP0008DA-A (8P2S-A) (not recommend for new design)

M51957AFP/BFP

M51958AFP/BFP

(Top view)

Power-supply

Output

Delay capacitor

REJ03D0778-0200

Aug 20, 2007

Rev.2.00

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