RENESAS RNA51957AFP#H0

RNA51957A,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 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.

• Few external parts
• Large delay time with a capacitor of small capacitance (td ≈ 100 ms, at 0.33 μF)
• 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

• 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