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Texas Instruments 2U3837J25QDBVRG4Q1
- Part No.:
- 2U3837J25QDBVRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
2U3837J25QDBVRG4Q1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,281
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Product details
Overview
2U3837J25QDBVRG4Q1 from Texas Instruments is an automotive-grade nanosupervisory circuit with 2.25 V fixed reset threshold, push-pull active-high RESET output, 220 nA typical supply current, and selectable 10 ms / 200 ms power-on reset delay via CT pin - used for reliable power-up initialization in battery-powered automotive microcontrollers and low-power DSPs.
For engineers reviewing the 2U3837J25QDBVRG4Q1 datasheet, 2U3837J25QDBVRG4Q1 pinout, 2U3837J25QDBVRG4Q1 application, or 2U3837J25QDBVRG4Q1 equivalent, this page delivers verified technical context, exact pin functions, real-world automotive use cases, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The 2U3837J25QDBVRG4Q1 implements a precision bandgap-based voltage reference with 2.25 V ±3% threshold (VIT = 2.16–2.30 V), internal hysteresis of 40 mV, and a refresh timer that asserts RESET until VDD exceeds VIT and remains stable for the selected delay period. Its CT pin selects between 10 ms (CT = GND) and 200 ms (CT = VDD) delay times.
It features manual reset (MR) with −200 µA low-level input current at VDD = 6 V, operates across −40°C to 125°C, and uses a dedicated push-pull output stage delivering VOH ≥ 0.8 × VDD at −2 mA and VOL ≤ 0.4 V at 2 mA - enabling direct interface with MCU reset inputs without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.25 V ±3% - ensures reliable detection of 2.5 V rail brownout before system instability occurs |
| Supply Current | 220 nA typical at VDD > VIT - enables multi-year operation on coin-cell batteries in always-on automotive modules |
| Reset Output Type | Active-high push-pull - eliminates need for external pull-up resistor and reduces BOM count |
| Power-On Reset Delay | Selectable 10 ms (CT = GND) or 200 ms (CT = VDD) - matches startup timing requirements of diverse MCUs |
| Operating Temperature | −40°C to 125°C - qualified for under-hood automotive applications per AEC-Q100 |
| ESD Protection | 2000 V HBM, 200 V MM - withstands handling and board assembly stress in production environments |
| Package | SOT-23 (DBV), 5-pin - supports high-density PCB layouts with standard reflow compatibility |
Pinout & Package
2U3837J25QDBVRG4Q1 is housed in a 5-pin SOT-23 (DBV) package with 1.45 mm max height, 0.95 mm pin pitch, and Q3 quadrant pin-1 orientation on tape-and-reel. The package is RoHS-compliant, moisture-sensitive level 1, and rated for peak reflow at 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CT | Delay time configuration | Connect to GND for 10 ms delay or VDD for 200 ms delay; draws ≤25 nA leakage current |
| 2 - GND | Ground reference | Primary return path for internal reference and output driver; requires local 0.1 µF ceramic bypass |
| 3 - MR | Manual reset input | Active-low asynchronous reset; internal 30 kΩ pull-up enables tie-to-VDD if unused |
| 4 - VDD | Supply input | Operates from 1.6 V to 6 V; powers internal reference, timer, and output stage |
| 5 - RESET | Active-high push-pull output | Drives high (≥0.8×VDD) or low (≤0.4 V) directly into MCU reset pin; no external components needed |
Key Features
| Feature | Design Value |
|---|---|
| Nanopower consumption | 220 nA typical supply current enables >10-year battery life in always-on vehicle event recorders |
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to 125°C) with customer-specific configuration control for OEM traceability |
| Configurable reset timing | Single external connection (CT pin) selects between short (10 ms) and long (200 ms) reset assertion windows |
| Robust reset output | Push-pull architecture delivers full-rail drive strength (±2 mA) without external biasing components |
| Precision threshold stability | ±3% VIT tolerance with <0.1% temperature drift over full range ensures consistent reset behavior across thermal cycles |
Applications
| Engine Control Unit (ECU) Power Sequencing | Telematics Control Unit (TCU) Cold Boot |
|---|---|
Use Scenario: Ensures deterministic startup of 32-bit ARM Cortex-M7 MCU after ignition power-up, preventing firmware lockup due to premature clock or memory enable. IC Role / Device Role / Timing Role: Primary power-on reset generator with 200 ms delay (CT = VDD) synchronized to CAN transceiver initialization sequence. Use Value: Eliminates need for discrete RC network and improves reset timing accuracy to ±5% vs. ±20% typical for passive solutions. | Use Scenario: Maintains valid reset state during vehicle battery voltage sag (<9 V) during cranking, then releases reset only after stable 3.3 V LDO output is confirmed. IC Role / Device Role / Timing Role: Voltage supervisor monitoring 3.3 V domain; asserts active-high RESET until VDD exceeds 2.25 V and holds for 10 ms (CT = GND). Use Value: Prevents TCU firmware corruption during engine start by extending reset hold time beyond transient dip duration. |
| ADAS Camera Module Sleep/Wake | EV Battery Management System (BMS) Monitor |
Use Scenario: Enables ultra-low-power wake-from-sleep mode in 8 MP image sensor subsystem, where MCU must initialize only after stable 1.8 V core rail is confirmed. IC Role / Device Role / Timing Role: Nanopower supervisor on 1.8 V rail; triggers wake sequence via MR pin upon CAN bus activity detection. Use Value: Reduces quiescent current by 92% versus legacy 2.5 µA supervisors, extending camera module standby time to >3 months on single-cell LiFePO₄. | Use Scenario: Monitors isolated 5 V auxiliary supply powering analog front-end and isolated SPI isolators in high-voltage BMS stack monitor ICs. IC Role / Device Role / Timing Role: Secondary reset source asserting RESET to isolated microcontroller when 5 V rail drops below 2.25 V during cell balancing transients. Use Value: Adds fault containment layer that prevents corrupted ADC sampling or false fault reporting during high-current switching events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3837J25QDBVRQ1 | Identical functionality, same DBV package, identical pinout and electrical specs - differs only in reel marking (PDSQ vs G4Q1) | No functional difference; both qualified for automotive use and share same AEC-Q100 test reports | Select TPS3837J25QDBVRQ1 when sourcing from TI's standard distribution channel with standard reel labeling |
| MAX6375XR22+T | 2.2 V threshold (±1.5%), 1.6 µA supply current, open-drain output, fixed 200 ms delay - lacks CT pin configurability and MR input | Requires external pull-up; higher current draw limits use in multi-year battery systems; suited for simpler cost-sensitive modules | Choose MAX6375XR22+T only when CT/MR flexibility is unnecessary and legacy design reuse is prioritized over nanopower savings |
Compared with TPS3837J25QDBVRQ1, 2U3837J25QDBVRG4Q1 offers identical performance but distinct reel marking for traceability in Tier-1 automotive programs; versus MAX6375XR22+T, it delivers 7× lower quiescent current and configurable timing - critical for next-gen low-power ADAS and telematics platforms.
Availability
2U3837J25QDBVRG4Q1 is available at Aetrix Electronics and suitable for automotive ECU power sequencing, telematics cold boot, ADAS camera sleep/wake, and EV BMS monitor applications requiring stable component supply with full AEC-Q100 compliance and long-term lifecycle support.
Supply support for 2U3837J25QDBVRG4Q1 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 leader specializing in analog, embedded processing, and automotive electronics, with over 50 years of innovation in power management and signal chain solutions.
The TPS3837-Q1 family was designed specifically for automotive microcontroller and DSP supervision, emphasizing nanopower operation, AEC-Q100 qualification, and flexible reset timing to meet stringent ISO 26262 functional safety readiness requirements.
FAQ
What is the exact reset threshold voltage of the 2U3837J25QDBVRG4Q1?
The 2U3837J25QDBVRG4Q1 has a nominal reset threshold voltage of 2.25 V, with a guaranteed range of 2.16 V to 2.30 V over −40°C to 125°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the SGLS141A datasheet. The 2U3837J25QDBVRG4Q1 uses an internal precision voltage divider to set this threshold, ensuring stability against supply ripple and temperature drift.
Does the 2U3837J25QDBVRG4Q1 support manual reset functionality?
Yes, the 2U3837J25QDBVRG4Q1 supports manual reset via its MR pin (Pin 3), which is active-low and internally pulled up with a 30 kΩ resistor. When MR is pulled low, RESET immediately goes high (active state). If unused, MR should be tied to VDD to minimize leakage current. The 2U3837J25QDBVRG4Q1 datasheet specifies MR input current as −200 µA at VDD = 6 V and 0 V applied.
What is the purpose of the CT pin on the 2U3837J25QDBVRG4Q1?
The CT pin (Pin 1) on the 2U3837J25QDBVRG4Q1 selects the power-on reset delay time: connecting CT to GND configures a 10 ms delay, while connecting CT to VDD selects 200 ms. This allows one device to serve multiple MCU timing requirements without redesign. The 2U3837J25QDBVRG4Q1 draws only ±25 nA through CT, making it compatible with simple resistor dividers or direct connections.
Is the 2U3837J25QDBVRG4Q1 pin-compatible with other TPS383x-Q1 variants?
Yes, all TPS3836/3837/3838-Q1 devices in the DBV package - including the 2U3837J25QDBVRG4Q1 - share identical 5-pin SOT-23 pinout and mechanical footprint. However, output logic polarity and type differ: 2U3837J25QDBVRG4Q1 provides active-high push-pull, whereas TPS3836 variants are active-low push-pull and TPS3838 variants are active-low open-drain.
What automotive qualification does the 2U3837J25QDBVRG4Q1 meet?
The 2U3837J25QDBVRG4Q1 is qualified per AEC-Q100 Grade 1 (−40°C to 125°C ambient), with additional customer-specific configuration control and major-change approval processes required for automotive production release. It meets ESD requirements of 2000 V HBM and 200 V MM, and is manufactured in TI's IATF 16949-certified facilities - all confirmed in the SGLS141A datasheet and TI's official packaging addendum.
2U3837J25QDBVRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.25V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
2U3837J25QDBVRG4Q1 FAQ
1.How can I place an order for 2U3837J25QDBVRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 2U3837J25QDBVRG4Q1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 2U3837J25QDBVRG4Q1 reliable?
The price and inventory of 2U3837J25QDBVRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2U3837J25QDBVRG4Q1 is usually 5 days.
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5.How can I obtain technical support or documentation for 2U3837J25QDBVRG4Q1?
For technical support, including 2U3837J25QDBVRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2U3837J25QDBVRG4Q1 requirements.
6.How does Aetrix verify that 2U3837J25QDBVRG4Q1 is sourced from the original manufacturer or authorized distributors?
All 2U3837J25QDBVRG4Q1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 2U3837J25QDBVRG4Q1 meets industry standards.
7.What is the process for return or replacement of 2U3837J25QDBVRG4Q1?
All 2U3837J25QDBVRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with 2U3837J25QDBVRG4Q1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 2U3837J25QDBVRG4Q1 part is unused and in its original packaging.
Return procedure for 2U3837J25QDBVRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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