Supervisor IC for 5 V rails — 140 ms timeout, dual reset outputs
The Maxim Integrated MAX814LESA is a simple reset/power-on reset supervisor IC monitoring a single 4.7 V threshold rail. It asserts both active-high and active-low push-pull reset outputs for a minimum of 140 ms after the supply rises above the threshold, holding downstream logic in reset until the rail stabilizes. This part is used in microprocessor, microcontroller, and FPGA systems requiring a clean power-on reset sequence in industrial environments from -40°C to 85°C.
140 ms minimum reset timeout — what it buys you
The 140 ms minimum reset timeout gives the power supply and oscillator time to settle before the processor starts executing code.
Dual reset outputs — one part, two polarities
Active-high and active-low push-pull outputs on the same die mean this single supervisor can drive both an MCU reset pin (active-low) and a peripheral enable (active-high) without an external inverter. Both outputs are asserted during the timeout and de-asserted together when the timeout expires. No open-drain pull-up resistors needed — the push-pull stage drives rail-to-rail.
Industrial temperature grade — -40°C to 85°C
Rated for the -40°C to 85°C ambient range, this supervisor suits factory automation panels, outdoor telecom cabinets, and under-hood electronics where the PCB sees temperature swings. The 8-SOIC package keeps board area small while offering enough pin pitch for manual rework or inspection.
Lifecycle and sourcing — active, no LTB risk
The part is RoHS non-compliant, which may matter for EU RoHS-exempt applications or legacy BOMs where lead-bearing solder is still accepted.