Texas Instruments TPS3820-50DBVRQ1G4, Simple Reset/Power-On Reset, Active Low Push-Pull Output, 4.55V Threshold, 15ms Minimum Reset Timeout, SOT-23-5 Package, -40°C to 125°C, Automotive AEC-Q100 Qualified.
| Parameter | Value |
|---|---|
| Type | Simple Reset/Power-On Reset |
| Series | Automotive, AEC-Q100 |
| Mounting | Surface Mount |
| Voltage - threshold | 4.55V |
| Number of voltages monitored | 1 |
| Operating temperature | -40°C~125°C(TA) |
| Reset | Active Low |
| Output | Push-Pull, Totem Pole |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Reset timeout | 15ms Minimum |
| Case | SC-74A, SOT-753 |
The 4.55V threshold monitors a nominal 5V rail. When the supply drops below this level, the active-low reset output asserts and holds the system in reset for at least 15ms after the rail recovers. The push-pull output drives directly to the downstream MCU or FPGA reset input without an external pull-up resistor.
Yes. The TPS3820-50DBVRQ1G4 is part of the Automotive, AEC-Q100 series. An OEM auditor will expect AEC-Q100 grade documentation — the part number suffix Q1 confirms the automotive qualification tier.
The TPS3820-50 has a fixed 4.55V threshold for monitoring a 5V rail, while the TPS3823 typically has a different threshold voltage (e.g., 3.08V for a 3.3V rail). Both share the same SOT-23-5 package and active-low push-pull output, so they are pin-compatible across the family. The correct choice depends entirely on the supply voltage being supervised.
The reset timeout is a minimum of 15ms. This is the guaranteed minimum delay from when the supply rises above the threshold to when the reset output de-asserts. The actual timeout is longer and is specified in the datasheet; the 15ms floor ensures the system power supply has stabilised before the processor starts executing code.