2.925V trip point — the 3.3V rail watchdog
The Microchip MCP100T-300I/TT is a simple reset/power-on reset supervisor that monitors a single voltage rail and asserts a reset when VCC drops below the 2.925V threshold. This threshold is set for 3.3V nominal systems — it trips before the logic supply falls out of spec, holding the processor in reset until the rail recovers and the 150ms minimum timeout expires. The push-pull, totem-pole output drives the reset line directly without an external pull-up resistor, saving one component per BOM.
This supervisor is suited for factory automation, outdoor telecom cabinets, motor drives, and other equipment that sees seasonal temperature swings but not extended under-hood or downhole extremes. The SOT-23-3 package keeps the footprint small — three pins, one for VCC, one for GND, one for the /RST output.
The ROHS3 compliance is confirmed — no lead, no restricted substances in the SOT-23-3 package. For the sourcing desk: this is a standard-channel BOM line, quoted to order against RFQ quantities.
150ms timeout — why it matters for power sequencing
The 150ms minimum reset timeout is the window the supervisor holds the reset line low after VCC rises above the 2.925V threshold. If the downstream MCU or SoC requires a longer reset pulse, this part may not be the right fit — check the processor's minimum reset hold time against this 150ms floor.