Texas Instruments 2U3838J25QDBVRG4Q1

Overview

2U3838J25QDBVRG4Q1 from Texas Instruments is an automotive-grade nano-power supervisory circuit with 2.25 V fixed reset threshold, open-drain active-low RESET output, 10 ms/200 ms selectable power-on reset delay, 220 nA typical supply current, and operation from −40°C to 125°C in a 5-pin SOT-23 package. It monitors supply voltage for low-power microcontrollers in battery-powered automotive systems.

For engineers reviewing the 2U3838J25QDBVRG4Q1 datasheet, 2U3838J25QDBVRG4Q1 pinout, 2U3838J25QDBVRG4Q1 application, or 2U3838J25QDBVRG4Q1 equivalent, key selection criteria include its open-drain output configuration, precise 2.25 V threshold (±1.5% over temperature), manual reset capability, CT-pin programmable delay, and AEC-Q100 qualification for automotive use.

Technical Context

The 2U3838J25QDBVRG4Q1 implements a band-gap referenced voltage comparator with internal hysteresis (40 mV) to detect VDD crossing the 2.25 V threshold. Its reset assertion logic triggers when VDD falls below VIT or rises above 1.1 V during power-up, with delay timing controlled by the CT pin tied to GND (10 ms typ) or VDD (200 ms typ).

It features an open-drain RESET output capable of sinking 5 mA, enabling wired-OR configurations and compatibility with diverse logic families. The MR input supports manual reset with internal 30 kΩ pullup, and the device maintains ultra-low quiescent current (220 nA typ at VDD > VIT, VDD < 3 V) across the full automotive temperature range.

Key Specifications

Pinout & Package

2U3838J25QDBVRG4Q1 is housed in a 5-pin SOT-23 (DBV) package, 2.9 mm × 1.6 mm × 1.15 mm, RoHS-compliant and green (no Sb/Br), moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar supervisory circuit applications.

Compared with TPS3838J25QDBVRQ1, 2U3838J25QDBVRG4Q1 offers identical performance but reflects TI's newer packaging and marking convention (G4Q1 suffix, PDPQ marking); versus 2U3838K33QDBVRG4Q1, it provides tighter threshold alignment for 2.5 V systems, reducing risk of premature reset assertion during rail settling.

Availability

2U3838J25QDBVRG4Q1 is available at Aetrix Electronics and suitable for automotive engine control units, telematics systems, and ADAS camera modules requiring stable component supply with AEC-Q100 qualification and long-term production continuity.

Supply support for 2U3838J25QDBVRG4Q1 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 automotive, industrial, and personal electronics markets.

The TPS3838-Q1 family is designed specifically for automotive power-supply monitoring, providing precision voltage supervision, ultra-low power consumption, and robust operation across extreme temperature ranges to meet stringent vehicle reliability standards.

FAQ

What is the exact reset threshold voltage of the 2U3838J25QDBVRG4Q1 and how stable is it over temperature?

The 2U3838J25QDBVRG4Q1 has a nominal reset threshold voltage of 2.25 V, with a guaranteed tolerance of ±1.5% over the full −40°C to 125°C operating range. This stability is achieved through a trimmed band-gap reference and on-chip resistor divider. Typical normalized threshold variation across temperature is less than ±0.2%, as confirmed in Figure 5 of the SGLS141A datasheet. The 2U3838J25QDBVRG4Q1 maintains this accuracy without external calibration.

Does the 2U3838J25QDBVRG4Q1 support manual reset, and what are the input requirements for the MR pin?

Yes, the 2U3838J25QDBVRG4Q1 supports manual reset via the MR pin (Pin 3), which is active-low and internally pulled up to VDD with a 30 kΩ resistor. To assert reset, drive MR to ≤0.3 × VDD; to release, allow it to rise above 0.7 × VDD. Input leakage is ±200 µA max at VDD = 6 V. If unused, MR should be tied to VDD to minimize current consumption. The 2U3838J25QDBVRG4Q1 integrates this function without requiring external components.

How is the reset delay time configured on the 2U3838J25QDBVRG4Q1, and what are the valid options?

The reset delay time on the 2U3838J25QDBVRG4Q1 is selected using the CT pin (Pin 1): connect CT to GND for a typical 10 ms delay, or to VDD for a typical 200 ms delay. These values are specified at VDD ≥ VIT + 0.2 V and TA = 25°C, with min/max bounds of 5–15 ms and 100–300 ms respectively. The 2U3838J25QDBVRG4Q1 does not support intermediate or programmable delays - only these two hardware-selectable options.

What output type does the 2U3838J25QDBVRG4Q1 feature, and what are its drive capabilities?

The 2U3838J25QDBVRG4Q1 features an active-low open-drain RESET output (Pin 5). It can sink up to 5 mA while maintaining VOL ≤ 0.4 V at VDD = 3.3 V and IOL = 2 mA. It cannot source current. An external pull-up resistor is mandatory; value selection depends on bus capacitance and rise-time requirements. This output type allows wired-OR configurations and voltage-level flexibility - critical for the 2U3838J25QDBVRG4Q1's use in mixed-voltage automotive systems.

Is the 2U3838J25QDBVRG4Q1 qualified for automotive applications, and what standards does it meet?

Yes, the 2U3838J25QDBVRG4Q1 is explicitly qualified for automotive applications under AEC-Q100 Grade 1 (−40°C to 125°C ambient), with additional compliance to ISO/TS 16949 manufacturing requirements. It meets ESD robustness per MIL-STD-883 Method 3015 (>2000 V HBM) and machine model (>200 V), and operates reliably under automotive load-dump and cold-crank conditions due to its 1.6 V to 6 V supply range. The 2U3838J25QDBVRG4Q1 carries the "Q1" suffix denoting its automotive qualification status.