Description

M51953A,B/M51954A,B are semiconductor integrated circuits designed for detecting supply voltage and resetting all types of logic circuits such as CPUs.

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) (M51953, M51954)

• 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