Texas Instruments TPS3823-30DBVT, Simple Reset/Power-On Reset, Active Low, Push-Pull output, 2.63V threshold, 120ms minimum reset timeout, -40°C to 85°C, SOT-23-5
| Parameter | Value |
|---|---|
| Type | Simple Reset/Power-On Reset |
| Mounting | Surface Mount |
| Voltage - threshold | 2.63V |
| 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 | SC-74A, SOT-753 |
The TPS3823-30DBVT is a single-channel voltage supervisor that asserts a reset when the monitored supply drops below 2.63V. That threshold is chosen for a 3.3V nominal rail — it trips before the supply falls far enough to corrupt SRAM or cause flash read errors, but stays above the brownout zone of most Cortex-M and 8051 MCUs.
The TLV803EA29VDBZR is a close functional alternative — also a Simple Reset/Power-On Reset with Active Low output, but its output is Open Drain (needs a pull-up resistor) and its reset timeout is 130ms minimum versus 120ms. The threshold voltage differs: 2.63V for the TPS3823-30DBVT versus 2.93V for the TLV803EA29VDBZR. Verify the threshold matches your supply rail before substituting.
Yes — the 2.63V threshold is designed for a 3.3V nominal rail. The reset asserts when the supply falls below 2.63V, which is above the minimum operating voltage of most 3.3V MCUs and FPGAs. For a 3.0V rail, the threshold is too close to the operating floor — use a supervisor with a lower threshold instead.