0.9V threshold for low-voltage core rails
The TPS3831A09DQNT monitors a single supply rail at 0.9V threshold — a common point for sub-1V digital cores in low-power MCUs and SoCs. The active-low reset output is push-pull, which means no external pull-up resistor is needed and the reset signal stays clean without extra supply current.
Package and footprint for tight boards
Housed in a 4-X2SON package measuring 1x1 mm, this supervisor fits into space-constrained designs like sensor nodes or handheld instruments. The exposed pad aids thermal transfer to the PCB ground plane — critical when the device is powered continuously in a sealed enclosure. Surface-mount assembly with tape-and-reel or cut-tape options suits both prototyping and volume production. The 4-pin footprint keeps routing simple; no external components are required for basic operation.
For BOM planning, the base product number TPS3831 shares the same pinout and threshold options across the family, making it straightforward to qualify a voltage variant if the core rail changes in a future revision.