DESCRIPTION

M51943A are semiconductor integrated circuits designed for detecting supply voltage and resetting all types of logic circuits such as CPUs.

They find extensive applications,including battery checking circuits, level detecting circuit and waveform shaping circuit.

FEATURES

• Few external parts

• Detecting Voltage ………4.25V typ. (4.05V to 4.45V)

• Low threshold operating voltage (Supply voltage to keep low-state at low supply voltage) …0.6V(TYP.) at RL=22kW

• Wide supply voltage range ………… 2 to 17V

• Sudden change in power supply has minimal effect on the ICs

• Wide application range

• Extra small package (SOT-25)

(M51943ASL:3pin SIP,M51943AML:3pin SOP, M51943AL:5pin SIPalready Mass production)

APPLICATION

• Reset pulse generation for almost all logic circuits

• Battery checking, level detecting, waveform shaping circuits

• Delayed waveform generator

• Switching circuit to a back-up power supply

• DC/DC converter

• Over voltage protection circuit