Texas Instruments TPS3839E16DBZR

Overview

TPS3839E16DBZR 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 TPS3839E16DBZR datasheet, TPS3839E16DBZR pinout, TPS3839E16DBZR application, or TPS3839E16DBZR equivalent, key selection considerations include its 1.52 V threshold accuracy (±1% at 25°C), 200 ms reset delay, SOT-23-3 package compatibility, and transient immunity for fast VDD dips - all critical for portable medical devices, wearables, and metering systems with strict quiescent current budgets.

Technical Context

The TPS3839E16DBZR implements a precision bandgap-based voltage comparator with hysteresis (15 mV typical) to reject noise and transients on the VDD line. Its internal sampling architecture draws only ~15 µA for ~200 µs per measurement cycle, sustaining average current at 150 nA while maintaining accurate threshold detection across –40°C to +85°C.

No manual reset (MR) input is present - this is a 3-pin variant optimized for space-constrained designs where external reset assertion is unnecessary. The push-pull RESET output drives logic-level loads directly without external pull-up, supporting IOL = 2 mA at VDD ≥ 2.8 V and VOL ≤ 0.4 V.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package: 2.92 mm × 2.37 mm footprint, surface-mount, lead-free, RoHS-compliant, moisture sensitivity level (MSL) 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3839G18DBZR and MAX6375XR22+T, the TPS3839E16DBZR delivers optimal balance of ultra-low current, precise 1.52 V threshold, and production-proven reliability for cost-sensitive, battery-limited consumer and medical devices - making it the preferred choice where sub-200 nA operation and alkaline-cell compatibility are essential.

Availability

TPS3839E16DBZR is available at Aetrix Electronics and suitable for glucose monitors, wearable fitness trackers, smart utility meters, and portable handheld test equipment requiring stable component supply across extended product lifecycles.

Supply support for TPS3839E16DBZR 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 family was developed specifically for ultralow-power voltage supervision in battery-operated medical, industrial, and consumer devices - prioritizing nanoscale current efficiency, factory-trimmed accuracy, and robust transient rejection.

FAQ

What is the exact reset threshold voltage of the TPS3839E16DBZR?

The TPS3839E16DBZR has a factory-trimmed negative-going threshold voltage (VIT–) of 1.52 V, with ±1% accuracy at 25°C and guaranteed performance across –40°C to +85°C. This value is confirmed in the Electrical Characteristics table of the SBVS193D datasheet and applies specifically to the E16 variant in DBZ packaging.

Does the TPS3839E16DBZR support manual reset functionality?

No, the TPS3839E16DBZR does not include a manual reset (MR) input. It is the 3-pin SOT-23 variant of the TPS383x family; MR functionality is exclusive to the 4-pin TPS3831 variants (e.g., TPS3831E16DQNR). The TPS3839E16DBZR relies solely on VDD monitoring for reset assertion.

What is the minimum supply voltage at which the TPS3839E16DBZR guarantees a valid RESET output?

The TPS3839E16DBZR guarantees a valid active-low RESET output 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 state is undefined and must not be relied upon for system safety.

Can the TPS3839E16DBZR drive a microcontroller reset pin directly without a pull-up resistor?

Yes, the TPS3839E16DBZR features a push-pull RESET output capable of sinking up to 2 mA at VDD ≥ 2.8 V with VOL ≤ 0.4 V. This allows direct connection to standard CMOS reset inputs without an external pull-up resistor, simplifying layout and reducing component count.

How does the TPS3839E16DBZR handle fast voltage transients on the VDD line?

The TPS3839E16DBZR rejects transients shorter than ~20 µs (depending on amplitude relative to VIT– and hysteresis) via internal sampling and filtering. As shown in Figure 13 of SBVS193D, it requires both sufficient duration and depth below threshold to trigger reset - preventing false resets from switching noise or ESD-induced dips.