System Reset IC

Data Sheet


  • Suitable for replacement from MB3771
  • Detection voltage (VSA=4.2V±1.0%)
  • Adjustable detection voltage (VSB=1.23V±1.0%)
  • Possible to detect over voltage (VSC=1.245V±1.0%)
  • VSA and VSB have hysteresis characteristics at reset release
  • Operating temperature (Ta=-40 to 125°C)
  • Low quiescent current (280µA typ.)
  • Reference voltage can be taken out
  • Low reset operation voltage (0.8V typ.)
  • Package (SOP8 JEDEC 150mil)

General Description

The NJU2103B is a power supply voltage monitoring IC that instantaneously detects abnormality such as power supply voltage cutoff or drop and generates reset signal. It can monitor 2 systems of 5 V power supply and arbitrarily set voltage. Since VSB Detecting Voltage, VSC Detecting Voltage and RESETOutput Pulse Width are adjusted from NJU2103A, it is more suitable for replacement from MB3771. Furthermore, it improves usability by extending operating temperature, and making each parameter highly accurate.


  • Industrial equipment
  • Housing and facility equipment
  • OA equipment
  • Amusement equipment

Package Information

Part NumberPackage OutlinePinsMaterial Declaration (RoHS/Halogen)Terminal FinishWeight(mg) (Reference)Reflow solderingFlow solderingIron solderingPacking ConditionMSLSolder Foot Print
NJU2103BESOP8 JEDEC 150mil8-Sn2Bi76YesYesYesNon dry pack1

Sample & Buy

Part NumberPackagesStatusPacking SpecificationSampleBuy
NJU2103BESOP8 JEDEC 150mil(Active)Contact UsStock Check

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