What the 1.6 V threshold and 60 ms timeout mean for your rail
The TPS3610U18PW is a Battery Backup Circuit supervisor from Texas Instruments — it monitors a single voltage rail and asserts a reset when the supply drops below the 1.6 V threshold. The 60 ms minimum reset timeout holds the downstream processor in reset long enough for the core supply to stabilise before release, which avoids brown-out boot failures on 1.8 V logic rails. The active-low reset polarity is the standard for most MCUs and SoCs, so the signal connects directly to the processor reset input without inversion.
Temperature range and package — board-fit constraints
The 14-TSSOP package (4.40 mm width) is a fine-pitch surface-mount footprint — the 0.65 mm pin pitch is routable on a two-layer board if the trace widths stay under 0.3 mm, but a four-layer board is cleaner for the backup-battery routing.