Texas Instruments TPS3840DL22DBVR, Power Supply Monitor, 1-channel supervisor, 2.2V threshold, active-low open-drain reset, 619ms timeout, SOT-23-5 package.
| Parameter | Value |
|---|---|
| Type | Power Supply Monitor |
| Mounting | Surface Mount |
| Voltage - threshold | 2.2V |
| Number of voltages monitored | 1 |
| Operating temperature | -40°C~125°C(TJ) |
| Reset | Active Low |
| Output | Open Drain or Open Collector |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Reset timeout | 619ms Typical |
| Case | SC-74A, SOT-753 |
The TPS3840DL22DBVR is a power supply monitor — a reset supervisor that asserts a reset signal when the monitored voltage drops below 2.2V. It holds the reset output low for 619ms typical after the rail recovers, long enough for most power-good sequences to stabilise.
Yes — the reset output is open-drain, so it needs a pull-up resistor to the supervisor's supply rail to pull the output high when the reset is deasserted. Without it, the output floats low.
No — the TPS3840DL22DBVR has a 2.2V threshold, while the TPS3840DL30DBVR monitors a 3.0V rail. They are pin-compatible but not drop-in replacements unless your rail voltage matches.
The threshold voltage differs: TPS3840DL22DBVR trips at 2.2V, while the TPS3840DL25DBVR trips at 2.5V. Both are active-low, open-drain supervisors in SOT-23-5 with the same 619ms timeout.
The TLV803EA29VDBZR is a similar active-low, open-drain supervisor from Texas Instruments, but it has a 2.93V threshold and a 130ms minimum reset timeout. Not a pin-for-pin replacement — verify the threshold and timeout against your design.