2.63V threshold — the fit for 3.3V rails
When the monitored supply drops below this level, the push-pull output asserts both active-high and active-low reset signals, holding the system in reset until the rail recovers and the 140ms minimum timeout expires. This threshold is tailored for 3.3V logic rails — it triggers well before the 2.7V minimum operating voltage of typical 3.3V devices, ensuring the processor or FPGA sees a clean reset before the supply collapses into the undefined region.
140ms timeout — why it matters for power-up sequencing
The 140ms minimum reset timeout gives the power supply time to stabilize after a brownout or power-on event before the IC releases the reset. In systems with slow-rising supplies — common in industrial control with capacitive loads or long cable runs — this prevents the processor from starting execution before the rail is within tolerance. The push-pull output drives both active-high and active-low signals, so the IC can directly reset a microcontroller's RESET pin (active low) while simultaneously signaling an FPGA or CPLD that expects an active-high reset.
The single-voltage monitoring channel keeps the BOM simple: one IC per rail, no external timing components needed.
For volume production, the tape-and-reel variant (TPS3707-30D) may be the more efficient ordering code for automated assembly.