REAR56957A,B are semiconductor integrated circuits for resetting of all types of logic circuit such as CPUs, and have 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 ≈ 100ms, at 0.33μF)
  • Low threshold operating voltage (Supply voltage to keep low-state at low supply voltage): 0.6V (Typ.) at RL = 22kΩ
  • Wide supply voltage range: 2V to 17V
  • Wide application range




Type Title Date
Datasheet PDF 898 KB 日本語
Brochure PDF 8.73 MB
Product Change Notice PDF 782 KB 日本語
Product Change Notice PDF 1.46 MB 日本語
Product Reliability Report PDF 134 KB
Product Change Notice PDF 460 KB 日本語
Product Change Notice PDF 685 KB 日本語
7 items

Design & Development