Dual-voltage monitor in a SOT-23-5 footprint
The MIC2774N-44YM5TR is a dual multi-voltage supervisor from Microchip Technology that monitors two supply rails — one fixed at 4.43 V threshold and a second adjustable via external resistors. The active-low, open-drain output asserts a reset signal for a minimum of 140 ms when either monitored voltage drops below its threshold, then releases after the timeout expires. This makes it a compact supervisor for systems that need to sequence or guard a core voltage and an I/O rail from a single SOT-23-5 package.
Threshold, timeout, and temperature range
The fixed threshold of 4.43 V suits a 5 V nominal rail, catching brownouts before the downstream logic sees an invalid supply. The 140 ms minimum reset timeout gives the main supply time to stabilize after a fault clears, preventing spurious toggling during power-up or transient dips. The open-drain output allows wired-OR connection with other supervisors or a shared pull-up to the monitored rail.