Texas Instruments TPS3839K50DQNR

Overview

TPS3839K50DQNR from Texas Instruments is an ultralow-power voltage supervisor IC designed for supply monitoring in battery-critical systems. It features a factory-trimmed 4.38 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 single-cell Li-ion or multi-cell alkaline applications.

For engineers reviewing the TPS3839K50DQNR datasheet, TPS3839K50DQNR pinout, TPS3839K50DQNR application, or TPS3839K50DQNR equivalent, this device delivers precision threshold accuracy (±1% at 25°C), 200 ms reset delay, temperature-stable hysteresis (44 mV), and immunity to fast VDD transients - key parameters for low-voltage microcontroller supervision in portable medical and industrial edge devices.

Technical Context

The TPS3839K50DQNR implements a precision comparator-based supervision architecture with internal reference trimming, delivering stable negative-going threshold detection (VIT– = 4.271–4.446 V) and built-in hysteresis (Vhys = 44 mV). Its sampling-based ultra-low-current design draws only 150 nA typical while maintaining valid RESET assertion down to 0.6 V VDD.

Unlike the TPS3831 variant, the TPS3839K50DQNR omits the manual reset (MR) input and uses a 3-pin SOT-23 (DBZ) or 4-pin X2SON (DQN) package - confirmed by Device Options table and Pin Configuration section. The DQNR suffix denotes 4-pin X2SON packaging with 3000-unit tape-and-reel delivery.

Key Specifications

Pinout & Package

TPS3839K50DQNR is packaged in a 4-pin, 1.00 mm × 1.00 mm X2SON (DQN) package with exposed thermal pad. This compact footprint supports high-density PCB layouts in space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3839K50DQNR, TPS3839K33DQNR offers identical ultra-low-power performance at a lower threshold, while MAX6326XR33-T trades 10× higher quiescent current for broader vendor support - making TPS3839K50DQNR optimal for next-gen energy-harvesting and long-life portable systems.

Availability

TPS3839K50DQNR is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT sensors, and industrial handheld terminals requiring stable component supply across extended product lifecycles.

Supply support for TPS3839K50DQNR 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 for industrial, automotive, and personal electronics markets.

The TPS383x family was engineered specifically for ultralow-power voltage supervision in battery-constrained applications - prioritizing sub-200 nA operation, wide input voltage range (0.9–6.5 V), and factory-trimmed precision thresholds.

FAQ

What is the exact reset threshold voltage of the TPS3839K50DQNR?

The TPS3839K50DQNR has a factory-trimmed negative-going threshold voltage (VIT–) of 4.38 V, with a tolerance of ±1% at 25°C. The datasheet specifies a minimum of 4.271 V and maximum of 4.446 V across temperature and process variation - confirmed in Section 7.5 Electrical Characteristics under VIT– for TPS383xK50.

Does the TPS3839K50DQNR include a manual reset (MR) input?

No, the TPS3839K50DQNR does not include a manual reset input. Unlike the TPS3831 series, the TPS3839 family omits the MR pin - as verified in the Pin Functions table (Section 6) and Device Options table (Section 5), where TPS3839 variants list only VDD, GND, RESET, and NC pins.

What package type is used for the TPS3839K50DQNR?

The TPS3839K50DQNR uses the 4-pin X2SON (DQN) package measuring 1.00 mm × 1.00 mm, with an exposed thermal pad. This is confirmed by the Device Information table (page 4), Pin Configuration diagrams (page 6), and Orderable Addendum listing "TPS3839K50DQNR" with package "X2SON-4".

How long is the reset delay time for the TPS3839K50DQNR?

The TPS3839K50DQNR provides a typical reset delay time (td) of 200 ms after VDD rises above the threshold voltage. The datasheet specifies a minimum of 120 ms and maximum of 350 ms across temperature and voltage conditions - documented in Section 7.6 Timing Requirements and Figure 3 (Reset Delay vs Temperature).

Can the TPS3839K50DQNR operate with supply voltages below 1.0 V?

Yes, the TPS3839K50DQNR guarantees valid RESET logic state down to 0.6 V VDD, though its recommended operating range starts at 0.9 V. This capability is explicitly stated in the Features list ("Valid Reset for VDD > 0.6 V") and Electrical Characteristics table (V(POR) = 0.6 V), enabling robust brownout detection in deeply discharged battery scenarios.