描述 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.

特性 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 k?

? 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