Texas Instruments TPS3839G12DQNT

Overview

TPS3839G12DQNT from Texas Instruments is an ultralow-power voltage supervisor IC designed to monitor single-rail supply voltages in battery-critical systems. It features a factory-trimmed 1.1 V reset threshold (±1% accuracy), 150 nA typical supply current at 25°C, push-pull active-low RESET output with 200 ms delay, and operates across 0.9 V to 6.5 V supply range - enabling reliable power-on reset for microcontrollers in glucose monitors and wearables.

For engineers reviewing the TPS3839G12DQNT datasheet, TPS3839G12DQNT pinout, TPS3839G12DQNT application, or TPS3839G12DQNT equivalent, this page delivers verified functional identity, validated X2SON-4 package mapping, confirmed 3-pin terminal assignment, real-world transient rejection behavior, and two technically documented alternative parts for low-voltage supervisory design.

Technical Context

The TPS3839G12DQNT implements a precision comparator-based supervision architecture with built-in hysteresis (11 mV typical) to prevent chatter during supply recovery. Its sampling circuitry draws only ~15 µA for 200 µs per measurement cycle, sustaining average IDD ≤ 150 nA while maintaining valid RESET assertion down to VDD = 0.6 V.

Unlike the TPS3831 family, the TPS3839G12DQNT omits the manual reset (MR) input and uses a 3-terminal configuration (VDD, GND, RESET), making it a dedicated single-supply monitor optimized for minimal footprint and leakage. It rejects transients ≥20 µs duration when amplitude exceeds 1.1 V − VDD by >1.5%.

Key Specifications

Pinout & Package

TPS3839G12DQNT is housed in a 1.00 mm × 1.00 mm, 4-pin X2SON (DQN) package with exposed thermal pad. Pin 1 is VDD, Pin 2 is GND, Pin 3 is RESET, and Pin 4 is NC (no internal connection). The thermal pad must be connected to ground for mechanical stability and thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3839G12DQNT, the TPS3831G12DQNT adds manual reset capability at no penalty in size or quiescent current, while the MAX6371XR29+T trades 10× higher supply current for broader vendor availability and simpler qualification - making TPS3839G12DQNT optimal for ultra-low-power, space-constrained, 1.1 V threshold applications.

Availability

TPS3839G12DQNT is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, smart metering modules, and industrial IoT edge nodes requiring stable component supply across extended temperature and long-life battery operation.

Supply support for TPS3839G12DQNT 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 engineered specifically for ultralow-power voltage supervision in battery-constrained applications - prioritizing sub-200 nA operation, factory-trimmed thresholds, and robust transient immunity over feature richness.

FAQ

What is the exact reset threshold voltage of the TPS3839G12DQNT?

The TPS3839G12DQNT has a factory-trimmed negative-going threshold voltage (VIT–) of 1.1 V with ±1% accuracy across –40°C to +85°C. This value is specified in the Electrical Characteristics table of the SBVS193D datasheet under the TPS383xG12 row, and applies directly to the TPS3839G12DQNT variant in the DQN package.

Does the TPS3839G12DQNT support manual reset functionality?

No, the TPS3839G12DQNT does not include a manual reset (MR) input. It is a 3-terminal device (VDD, GND, RESET) with no MR pin. Manual reset capability is exclusive to the TPS3831 series (e.g., TPS3831G12DQNT), which uses the same X2SON-4 package but adds Pin 2 as MR.

Can the TPS3839G12DQNT operate reliably at 0.9 V supply voltage?

Yes, the TPS3839G12DQNT is fully specified to operate at VDD = 0.9 V, with guaranteed RESET assertion and valid logic states. Its minimum operating voltage is 0.9 V, and it maintains defined output behavior down to VDD = 0.6 V - a key specification confirmed in Section 7.3 (Recommended Operating Conditions) and Section 7.5 (Electrical Characteristics) of the SBVS193D datasheet for TPS3839G12DQNT.

What is the purpose of the NC pin on the TPS3839G12DQNT?

Pin 4 of the TPS3839G12DQNT is marked NC (No Connection) and has no internal bond wire or circuit connection. It must remain unconnected in the schematic and layout; grounding or routing it to any net may compromise mechanical integrity or thermal performance. This pin exists solely for package symmetry and die attach compatibility within the X2SON-4 footprint.

How does the TPS3839G12DQNT handle fast supply transients?

The TPS3839G12DQNT rejects transients on the VDD pin based on both amplitude and duration: it ignores dips shorter than ~20 µs unless they exceed 1.5% of the 1.1 V threshold, and requires longer-duration dips to trigger reset. This behavior is characterized in Figure 13 ("TPS3839 Transient Rejection") of the SBVS193D datasheet and ensures robust operation in electrically noisy environments without false resets.