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Texas Instruments TPS3840DL46DBVR — Power Management (PMIC / Gate Driver)

TPS3840DL46DBVR TI Simple Reset IC, 4.6V Threshold, SOT-23-5

MPNTPS3840DL46DBVR
Active

Texas Instruments TPS3840DL46DBVR, Simple Reset/Power-On Reset IC, single-channel supervisor, active-low open-drain output, 4.6V threshold, 619 ms reset timeout, SOT-23-5 package, -40°C to 125°C junction temperature.

$1.0100Ref. price · indicative, final on quote
Texas Instruments TPS3840DL46DBVR datasheet (PDF)
PackagingSC-74A, SOT-753
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TPS3840DL46DBVR specifications
ParameterValue
TypeSimple Reset/Power-On Reset
MountingSurface Mount
Voltage - threshold4.6V
Number of voltages monitored1
Operating temperature-40°C~125°C(TJ)
ResetActive Low
OutputOpen Drain or Open Collector
PackageTape & Reel (TR); Cut Tape (CT)
Reset timeout619ms Typical
CaseSC-74A, SOT-753

Product details

Supervisor for 5V rails — 4.6V threshold and 619 ms timeout

The TPS3840DL46DBVR is a single-channel voltage supervisor from Texas Instruments, designed to hold a microcontroller or FPGA in reset until the supply rail stabilises. Its 4.6V threshold is a natural fit for monitoring a nominal 5V rail, asserting reset when the voltage dips below that level. The reset output is active-low, open-drain, so it can be wire-ORed with other reset sources or pulled up to any logic voltage up to the absolute maximum rating — no level-shifting needed when interfacing to 3.3V or 1.8V logic. A built-in 619 ms (typical) reset timeout keeps the system in reset long enough for the supply to ring up cleanly after a brownout, without requiring an external capacitor.

Temperature range and package for industrial builds

The 5-pin footprint breaks out to the supply rail, ground, reset output, and a manual-reset input on the base part — though this variant is a dedicated supervisor without MR.

Sourcing posture — active, single-source, no direct replacement

There is no official pin-compatible second source from another manufacturer. Within the TPS3840 family, other threshold voltages (e.g. 3.0V, 3.3V, 5.0V) share the same SOT-23-5 footprint but differ in trip point — confirm the rail voltage before substituting.

Frequently asked questions

Is TPS3840DL46DBVR compatible with 3.3V logic?

Yes. The open-drain output allows the pull-up resistor to be tied to any voltage within the absolute maximum rating of the output transistor — typically up to 6V. For a 3.3V microcontroller, pull the reset output to 3.3V through a 10 kΩ resistor; the open-drain structure will pull the line low without level translation.

What is the reset timeout of TPS3840DL46DBVR?

The reset timeout is 619 ms typical. This is a fixed internal delay — no external capacitor is needed. It ensures the supply has settled after a brownout before the processor is released from reset.

Does TPS3840DL46DBVR have an open-drain output?

Yes. The reset output is open-drain, active-low. It requires an external pull-up resistor to the logic supply rail. This output type allows wire-ORing with other reset sources and works with any pull-up voltage up to the device's absolute maximum rating.