Texas Instruments TPS3831A09DQNR, Simple Reset/Power-On Reset, Active Low, Push-Pull Output, 0.9V Threshold, 120ms Min Reset Timeout, -40°C~85°C, 4-X2SON (1x1mm).
| Parameter | Value |
|---|---|
| Type | Simple Reset/Power-On Reset |
| Mounting | Surface Mount |
| Voltage - threshold | 0.9V |
| Number of voltages monitored | 1 |
| Operating temperature | -40°C~85°C(TA) |
| Reset | Active Low |
| Output | Push-Pull, Totem Pole |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Reset timeout | 120ms Minimum |
| Case | 4-XDFN Exposed Pad |
When the supply drops below that level, the active-low, push-pull output asserts and holds reset for a minimum of 120 ms after the rail recovers. This is a supervisor for low-voltage cores — think 1.0 V or 0.9 V logic rails on an FPGA or MCU where a 100 mV droop can corrupt state.
The 4-X2SON package measures 1x1 mm, which is about the size of a grain of sand.
Yes, the reset output is active low. When the monitored voltage drops below the 0.9 V threshold, the output goes low and stays low for a minimum of 120 ms after the rail recovers.