Mitsumi PST9142NR 4.2V System Reset IC – Voltage Supervisor – SMD
$3.99
Mitsumi PST9142NR system reset IC / voltage supervisor, sold from RF Boneyard bench stock.
This small SMD reset IC monitors a supply voltage rail and provides a reset function when voltage drops below the device threshold. Parts like this are commonly used in logic boards, microcontroller circuits, battery-powered electronics, display/control boards, radio control sections, and other embedded systems where stable startup and brownout reset behavior are important.
The chip top marking is 42AD. Tiny SMD ICs often use short top-marking codes instead of printing the full part number on the package.
Condition:
New bench stock / surplus stock.
Buyer must verify the exact part number, package, top marking, reset threshold, pinout, and circuit compatibility before installation.
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