4.4V threshold — the trip point that decides if your rail is healthy
The TPS3840DL44DBVR is a single-channel voltage supervisor with a 4.4V threshold. That means it holds the reset line low until the monitored supply crosses above 4.4V, then releases after a 619ms typical timeout. If you are running a 5V rail and need a clean power-on reset for an MCU or FPGA, this part gives you a fixed trip without external resistors.
Active-low open-drain output — field-swap friendly
The reset output is active-low, open-drain. On site, that means you can wire-OR it with other reset sources — no conflict if another supervisor or a manual reset button pulls the line low. The open-drain output also lets you pull up to any voltage up to the absolute max, so it works with 3.3V or 5V logic without a level shifter.
For procurement, that means you can plan multi-year builds without a last-time-buy trigger. Sourced per RFQ — lead time and pricing confirmed at quote time.
SOT-23-5 package — fits a standard footprint
The TPS3840DL44DBVR comes in a SC-74A / SOT-23-5 package. That is a five-pin SOT-23 with 0.95mm pitch — easy to hand-solder or rework with a standard iron. No hot-air station needed, no hidden thermal pad. The pinout is straightforward: GND, RESET, VDD, and two no-connect pins.