Dual-voltage supervisor in SOT-23-5
The MIC2774N-22YM5 is a dual micro-power low-voltage supervisor from Microchip Technology, monitoring two supply rails: one fixed at 2.25 V threshold and a second adjustable via external resistor divider. The active-low open-drain output asserts reset when either monitored voltage falls below its threshold, holding the output low for a minimum of 140 ms after both rails recover.
Reset timing and output drive
The 140 ms minimum reset timeout ensures the downstream processor or logic is held in reset long enough for the regulated supplies to settle after a brown-out or power-up event, eliminating false starts. An open-drain output allows the reset line to be pulled to any voltage up to the absolute maximum of the output transistor, enabling level translation between different supply domains without an external level shifter.
Supply monitoring and threshold selection
The adjustable channel's threshold is set by two external resistors, allowing the designer to fine-tune the trip point to the exact tolerance of the monitored supply, which is useful when the load's minimum operating voltage is tighter than the regulator's tolerance band.
Active production status
No official successor or pin-compatible cross-reference is listed by the manufacturer; the part is the current offering in its supervisory family.