1.71V threshold — the fit check for 1.8V rails
That 1.71V threshold is set for 1.8V nominal rails — it holds the reset active until the supply recovers above the threshold plus the built-in hysteresis, then releases after a 10ms minimum timeout. The active-low open-drain output lets it pull the reset line low on fault and can be shared with other open-drain reset sources through a pull-up resistor.
What the 10ms timeout buys the system
The 10ms minimum reset timeout is the guaranteed low pulse width the part delivers when the monitored rail crosses the threshold. This gives downstream devices — an MCU, FPGA, or SoC — enough time to complete their internal reset sequence before the IC releases the rail. If the timeout were shorter than the processor's reset hold requirement, the system could start up in an undefined state. The 10ms floor covers most 8-bit and 32-bit microcontroller reset specifications.
Package and temperature grade — board-fit and environment
Housed in a SOT-23-5 (SC-74A) package, this is a five-pin surface-mount device that fits a standard 0.95 mm pitch footprint.