Active production — a straightforward voltage supervisor in SOT-23-6
The MAX6361PUT46+ is an active-production power supply monitor from Analog Devices, built to assert a reset signal when the monitored rail drops below a 4.63 V threshold. It is a single-channel supervisor with an active-low, open-drain output — the standard topology for driving a microcontroller reset pin or a power-good flag in a 5 V system.
The 4.63 V threshold sits just below the nominal 5 V rail — it triggers when the supply droops about 7.4% below 5 V, which is a typical brownout detection point for 5 V logic. The 150 ms minimum reset timeout gives the rail time to recover from a transient glitch before the system sees a full reset cycle; a processor with a fast-starting PLL will typically be out of reset before the oscillator stabilises. The open-drain output pulls low on a fault and floats when the rail is good — this lets multiple supervisors wire-OR their outputs to a shared reset line, or lets a pull-up resistor set the logic level to match the downstream MCU's VDDIO. The active-low polarity is the industry convention for reset inputs on most microcontrollers and DSPs. The SOT-23-6 package (3.0 mm × 3.0 mm body) is a common footprint for voltage supervisors — it routes easily on a two-layer board and fits in space-constrained designs alongside the regulated rail's output capacitors.