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M51945A

Voltage Detecting, System Resetting IC Series

Renesas Electronics 

M51945A,B/M51946A,B

Voltage Detecting, System Resetting IC Series

REJ03D0774-0200

Rev.2.00

Aug 20, 2007

Description

M51945A,B/M51946A,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 fined extensive applications, including battery checking circuit, level detecting circuit and waveform shaping

circuit.

Features

• Few external parts

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

0.6 V (Typ) at RL = 22 kΩ

• 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,

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

circuit, DC/DC converter, over voltage protection circuit

Recommended Operating Condition

• Supply voltage range: 2 V to 17 V

Pin Arrangement

M51945AL/BL

M51946AL/BL

5 Output

4 NC

3 GND

2 Input

1 Power-supply

(Top view)

Outline: 5P5T

M51945AFP/BFP

M51946AFP/BFP

NC 1

8 NC

Input 2

7 Power-supply

NC 3

6 Output

GND 4

5 NC

(Top view)

NC: No Connection

Outline: PRSP0008DE-C (recommend)

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

REJ03D0774-0200 Rev.2.00 Aug 20, 2007

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