4.63V threshold supervisor in a SOT-23-3
The MAX6348UR46+T is a single-channel voltage supervisor from Analog Devices, monitoring a 4.63V threshold with an active-low, open-drain reset output. It is designed for power-on reset generation in systems where the supply rail must be held in reset until it stabilises above the threshold for at least 100ms.
What the threshold and timeout mean for your design
The 4.63V threshold is a precision trip point for 5V nominal rails — it asserts reset when VCC drops below this level, protecting downstream logic from brownout or power-up glitches. The open-drain output lets you wire-OR the reset signal with other supervisors or a manual reset button — the pull-up resistor goes to the monitored rail or any logic supply up to the absolute maximum rating. Active-low polarity matches the reset input of most MCUs and DSPs without an inverter.
SOT-23-3 footprint and board integration
Housed in a 3-pin SOT-23-3 (TO-236-3, SC-59), the MAX6348UR46+T occupies minimal board area — the footprint is 2.9mm × 1.3mm with 0.95mm pin pitch. Surface-mount assembly is straightforward with standard reflow profiles; no exposed pad or thermal management is needed at the ~10µA quiescent current.
Available in Tape & Reel (TR) or Cut Tape (CT) packaging — the reel format suits automated pick-and-place for volume production, while cut tape works for prototyping and low-volume builds.