SOT-23-5 supervisor for 2.3 V rails
The MAX6864UK23D3S+T is a single-channel voltage supervisor from Analog Devices, packaged in a 5-pin SOT-23-5 (SC-74A) footprint. It monitors a single supply rail at a 2.313 V threshold and asserts an active-low reset signal for a minimum of 150 ms when the voltage drops below that level. The push-pull output eliminates the need for an external pull-up resistor, directly driving the reset input of an MCU or DSP without additional components. The 150 ms timeout covers the power-up settling period for most microcontrollers, ensuring the core starts from a known state.
2.313 V threshold and -40 to 85°C range
The 2.313 V threshold is set for monitoring a 2.5 V or 2.3 V nominal rail — it trips before the core supply falls out of regulation, preventing brownout execution in the processor. Surface-mount assembly on the SOT-23-5 footprint is straightforward with standard reflow profiles; the small body (2.9 mm × 1.6 mm typical) fits tight layouts where board space is at a premium. The active-low reset polarity matches the majority of MCU reset inputs, making this a drop-in fit for most designs.