Mitsumi PST9142NR System Reset IC – 4.2V Voltage Supervisor – Logic Reset IC
$6.95
Mitsumi PST9142NR system reset monolithic IC used for voltage monitoring and logic reset applications. This device is commonly described as a 4.2V voltage supervisor / reset IC in a small SOT-style package.
Parts like this are useful for repair benches, logic boards, microcontroller circuits, battery-powered equipment, radio control sections, and general electronics troubleshooting where a reset or supply-voltage detection IC is required.
This is a small but useful RF Boneyard bench-stock part for technicians repairing older electronic equipment where exact small ICs can be harder to locate. Datasheet listings identify the PST9142NR as a Mitsumi power-management/reset circuit with fixed +4.2V detection, and product listings describe it as a SOT-23/SOT-25 5-pin system reset monolith
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