Reset supervisor for a single 3.9V rail
The MAX6464XR39+T is a simple reset/power-on reset IC that monitors a single voltage rail and asserts a reset signal when the supply drops below 3.9V. The reset output is active low with a push-pull, totem pole stage, so it can drive the reset input of an MCU or logic device without an external pull-up resistor. This is a fixed delay — no external capacitor sets the period. The SC-70-3 package (SOT-323 footprint) keeps the board area under 3 mm² and suits space-constrained designs.
Lifecycle and compliance check for BOM planning
No pin-compatible second source or official successor is recorded for this order code. The part is single-sourced from Maxim Integrated (now part of Analog Devices). For a BOM line that cannot tolerate sole-sourcing risk, qualifying an alternate reset IC with the same threshold and package footprint during the design phase is the prudent move.