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Texas Instruments TPS3840PH18DBVR — Power Management (PMIC / Gate Driver)

TPS3840PH18DBVR – TI Simple Reset IC, 1.8V Threshold

MPNTPS3840PH18DBVR
Active

Texas Instruments TPS3840PH18DBVR, Simple Reset/Power-On Reset, 1.8V threshold, Active High push-pull output, 619 ms typical reset timeout, -40°C to 125°C junction, SOT-23-5 package.

$1.2100Ref. price · indicative, final on quote
Texas Instruments TPS3840PH18DBVR datasheet (PDF)
PackagingSC-74A, SOT-753
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TPS3840PH18DBVR specifications
ParameterValue
TypeSimple Reset/Power-On Reset
MountingSurface Mount
Voltage - threshold1.8V
Number of voltages monitored1
Operating temperature-40°C~125°C(TJ)
ResetActive High
OutputPush-Pull, Totem Pole
PackageTape & Reel (TR); Cut Tape (CT)
Reset timeout619ms Typical
CaseSC-74A, SOT-753

Product details

1.8V rail supervisor with active-high assertion

The TPS3840PH18DBVR is a single-channel voltage supervisor from TI's TPS3840 family, built to monitor a 1.8V supply rail and assert a logic-high reset when the voltage drops below that threshold. The active-high output is push-pull, so it drives the reset line directly without an external pull-up resistor. This delay is fixed internally; no external capacitor is needed.

The 619 ms typical reset timeout is a single, non-adjustable value. For designs that need a shorter or programmable delay, the TLV803 family offers 130 ms and 33 ms minimum options, but those parts use an open-drain active-low output and require an external pull-up. This means the die can reach 125°C even if the ambient stays lower — relevant for enclosures with poor airflow or adjacent hot components.

We can quote against your BOM quantity and confirm availability at the time of the RFQ.

Frequently asked questions

Does TPS3840PH18DBVR have an active-high reset?

Yes, the reset output is active high with a push-pull, totem-pole stage. The output goes high when the monitored 1.8V rail drops below the threshold and stays high for the 619 ms timeout after the rail recovers.

When sourcing TPS3840PH18DBVR, what is the closest functional alternative?

The TLV803EA29VDBZR is a simple reset supervisor from the same class, but it has an active-low open-drain output and a 130 ms minimum timeout, compared to the TPS3840's active-high push-pull output with 619 ms typical timeout. The output polarity and drive type differ, so a board-level change is required to swap them.