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