Texas Instruments TPS3839E16DQNR

Overview

TPS3839E16DQNR from Texas Instruments is an ultralow-power voltage supervisor IC designed for single-rail supply monitoring in battery-critical systems. It features a factory-trimmed 1.52 V reset threshold, 150 nA typical supply current at 25°C, push-pull RESET output, and valid operation down to 0.6 V VDD - enabling reliable power-on reset in sub-1.8 V alkaline or Li-ion single-cell applications.

For engineers reviewing the TPS3839E16DQNR datasheet, TPS3839E16DQNR pinout, TPS3839E16DQNR application, or TPS3839E16DQNR equivalent, key selection criteria include its 1.52 V threshold accuracy (±1% at 25°C), 200 ms reset delay, −40°C to +85°C temperature range, SOT-23-3 package compatibility, and transient immunity for fast VDD dips.

Technical Context

The TPS3839E16DQNR implements a precision bandgap-based voltage reference with hysteresis (15 mV typical) to reject noise and transients on the VDD line. Its sampling architecture draws only ~15 µA for ~200 µs during each measurement cycle, sustaining average quiescent current at 150 nA.

Unlike the TPS3831 variant, the TPS3839E16DQNR omits the manual reset (MR) input and uses a 3-pin SOT-23 (DBZ) package - simplifying layout while retaining full reset assertion capability via VDD monitoring alone.

Key Specifications

Pinout & Package

TPS3839E16DQNR is housed in a 3-pin SOT-23 (DBZ) package - 2.92 mm × 2.37 mm footprint, surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with TPS3831E16DQNR, the TPS3839E16DQNR reduces pin count and eliminates MR complexity for pure VDD-monitoring use cases; versus MAX6375XR22+T, it delivers 10× lower current and tighter threshold accuracy at the cost of fixed 1.52 V trip point.

Availability

TPS3839E16DQNR is available at Aetrix Electronics and suitable for portable medical sensors, energy metering modules, wearable fitness trackers, and industrial IoT edge nodes requiring stable component supply across long-lifecycle deployments.

Supply support for TPS3839E16DQNR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in low-power design and precision analog IP.

The TPS383x product line was developed specifically for ultralow-power voltage supervision in battery-constrained applications - targeting glucose monitors, wearables, smart meters, and other devices demanding nanoscale quiescent current and sub-2 V threshold accuracy.

FAQ

What is the exact reset threshold voltage of the TPS3839E16DQNR?

The TPS3839E16DQNR has a factory-trimmed negative-going threshold voltage (VIT–) of 1.52 V, with ±1% accuracy at 25°C. This value is specified in the Electrical Characteristics table of the SBVS193D datasheet and applies across the full −40°C to +85°C operating range, with typical drift less than 0.02%/°C.

Does the TPS3839E16DQNR support manual reset functionality?

No, the TPS3839E16DQNR does not include a manual reset (MR) input. That feature is exclusive to the TPS3831 family (e.g., TPS3831E16DQNR). The TPS3839E16DQNR relies solely on VDD monitoring and provides only VDD, GND, and RESET pins in its SOT-23-3 package.

What is the minimum supply voltage at which the TPS3839E16DQNR guarantees valid RESET output?

The TPS3839E16DQNR guarantees a valid RESET output state down to VDD = 0.6 V, as specified by the V(POR) parameter in Section 7.5 of the datasheet. Below 0.6 V, the RESET output becomes undefined and must not be relied upon for system safety.

Can the TPS3839E16DQNR drive a microcontroller reset pin directly?

Yes, the TPS3839E16DQNR features a push-pull RESET output capable of sinking up to 2 mA at VDD ≥ 2.8 V. It can directly drive standard CMOS reset inputs without an external pull-up resistor, simplifying circuit design and improving noise immunity.

How does the TPS3839E16DQNR achieve 150 nA typical supply current?

The TPS3839E16DQNR achieves ultralow current via a duty-cycled sampling architecture: it draws ~15 µA for ~200 µs every ~100 ms to measure VDD, resulting in an average current of 150 nA. This design avoids continuous biasing while maintaining accurate threshold detection and transient rejection.