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Texas Instruments TPS3840PL33DBVR — Power Management (PMIC / Gate Driver)

TPS3840PL33DBVR Simple Reset IC 3.3V Active Low SOT-23-5

MPNTPS3840PL33DBVR
Active

Texas Instruments TPS3840PL33DBVR, Simple Reset/Power-On Reset IC, monitors a single 3.3V supply, Active Low push-pull output, 619 ms typical reset timeout, SOT-23-5 package, -40°C to 125°C operating range.

$0.8700Ref. price · indicative, final on quote
Texas Instruments TPS3840PL33DBVR datasheet (PDF)
PackagingSC-74A, SOT-753
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TPS3840PL33DBVR specifications
ParameterValue
TypeSimple Reset/Power-On Reset
MountingSurface Mount
Voltage - threshold3.3V
Number of voltages monitored1
Operating temperature-40°C ~ 125°C (TJ)
ResetActive Low
OutputPush-Pull, Totem Pole
PackageTape & Reel (TR) Cut Tape (CT)
Reset timeout619ms Typical
CaseSC-74A, SOT-753

Product details

3.3V rail supervisor with 619 ms timeout

The TPS3840PL33DBVR is a nanopower Simple Reset/Power-On Reset IC from Texas Instruments, designed to monitor a single 3.3V supply rail and assert a reset signal when the voltage drops below the threshold. The reset output is Active Low with a push-pull, totem pole stage, meaning it drives the reset line low during undervoltage and releases it high when the supply recovers, with no external pull-up resistor needed. A typical reset timeout of 619 ms holds the reset line low after the supply stabilises, giving the downstream MCU or SoC time to complete its power-on sequence before code execution starts.

Housed in a SOT-23-5 (SC-74A) package, it occupies minimal board area and routes easily on a 2-layer PCB — the 5-pin footprint keeps the fan-out simple for the supply and reset traces.

Frequently asked questions

What is the reset timeout of the TPS3840PL33DBVR?

The typical reset timeout is 619 ms, which holds the reset line low after the monitored 3.3V rail rises above the threshold, allowing the system power-up sequence to settle.

Is the TPS3840PL33DBVR suitable for battery-powered applications?

Yes — the nanopower design draws very low quiescent current, making it a good fit for battery-operated equipment where every microamp matters. The exact Iq is listed in the datasheet.

When sourcing the TPS3840PL33DBVR, what is the closest functional second-source?

The TLV803EA29VDBZR is a peer device from Texas Instruments with a similar Simple Reset function and Active Low output, but it uses an open-drain output (requires external pull-up) and has a 130 ms minimum reset timeout versus the TPS3840PL33DBVR's 619 ms typical. The TLV803ED29DBZR offers a 33 ms minimum timeout. Neither is a drop-in replacement — check the output stage and timeout before substituting.