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Texas Instruments TPS3838J25QDBVRQ1
- Part No.:
- TPS3838J25QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3838J25QDBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,692
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Product details
Overview
TPS3838J25QDBVRQ1 from Texas Instruments is an automotive-grade nanosupervisory circuit with 2.25 V fixed reset threshold, open-drain active-low RESET output, 220 nA typical supply current, and selectable 10 ms / 200 ms power-on reset delay via CT pin. It monitors supply voltage in low-power automotive microcontrollers and battery-powered systems.
For engineers reviewing the TPS3838J25QDBVRQ1 datasheet, TPS3838J25QDBVRQ1 pinout, TPS3838J25QDBVRQ1 application, or TPS3838J25QDBVRQ1 equivalent, key selection criteria include its AEC-Q100 qualification, −40°C to 125°C operation, SOT-23-5 package, open-drain output drive capability, and precise 2.25 V ±1.5% threshold tolerance.
Technical Context
The TPS3838J25QDBVRQ1 implements a bandgap-referenced voltage comparator with internal hysteresis (40 mV) to reject noise-induced false resets. Its reset assertion logic triggers when VDD falls below 2.25 V and holds RESET low until VDD rises above threshold plus hysteresis, then applies a user-selectable delay before deassertion.
Reset timing is controlled by the CT pin: grounding CT selects a typical 10 ms delay; connecting CT to VDD selects a typical 200 ms delay. Manual reset (MR) provides asynchronous reset override with 1 µs minimum pulse width requirement and internal 30 kΩ pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.25 V ±1.5% - precisely supervises 2.5 V nominal rails with margin for dropout and ripple |
| Supply Current | 220 nA typical at VDD > VIT - enables multi-year battery life in always-on automotive sensors |
| Reset Delay Options | 10 ms (CT = GND) or 200 ms (CT = VDD) - configurable timing for processor boot sequence alignment |
| Output Type | Active-low open-drain RESET - supports wired-OR configurations and level translation to diverse logic families |
| Operating Temperature | −40°C to 125°C - qualified for under-hood and infotainment module deployment per AEC-Q100 Grade 1 |
| Hysteresis | 40 mV - prevents oscillation during slow-rising or noisy supply transitions |
| ESD Rating | >2000 V HBM, >200 V MM - robust against assembly and field handling stress |
Pinout & Package
TPS3838J25QDBVRQ1 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CT | Delay Configuration Input | Selects reset timeout: GND = 10 ms, VDD = 200 ms; high-impedance input draws <25 nA |
| 2 - GND | Ground Reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 3 - MR | Manual Reset Input | Active-low asynchronous reset trigger; internal 30 kΩ pull-up enables default high state when unused |
| 4 - VDD | Supply Input | Power rail input (1.6–6 V); powers internal bandgap, comparator, and timer; requires 0.1 µF ceramic bypass |
| 5 - RESET | Open-Drain Output | Active-low reset signal; requires external pull-up resistor (typically 10–100 kΩ) to target logic voltage |
Key Features
| Feature | Design Value |
|---|---|
| Nanopower Operation | 220 nA supply current enables integration into energy-harvesting and coin-cell-powered automotive modules |
| Automotive Qualification | AEC-Q100 Grade 1 certified with full temperature range support (−40°C to 125°C) and PPAP documentation available |
| Configurable Reset Timing | Two factory-set delay options selected externally-no trimming resistors or firmware required |
| Robust Input Protection | Input clamp current ±10 mA and ESD rating exceeding 2000 V HBM ensure reliability in harsh automotive environments |
| Precision Threshold Stability | ±1.5% initial accuracy and <1% drift over temperature enable reliable supervision without calibration |
Applications
| Engine Control Unit (ECU) Power Sequencing | Automotive Infotainment System Reset Management |
|---|---|
Use Scenario: Ensures deterministic startup of dual-core MCU after 12 V battery cold-crank recovery, where supply ramps slowly from 6 V to 13.5 V. IC Role / Device Role / Timing Role: Monitors 3.3 V LDO output and asserts open-drain RESET until stable, then delays 200 ms to allow PLL lock and memory initialization. Use Value: Prevents firmware execution on marginal voltage, eliminating boot failures and EEPROM corruption during transient brownouts. | Use Scenario: Coordinates reset sequencing between application processor, audio codec, and display controller in head-unit design. IC Role / Device Role / Timing Role: Provides synchronized, delayed reset release across multiple voltage domains using wired-OR RESET bus topology. Use Value: Eliminates race conditions during power-up, ensuring all peripherals are held in reset until main SoC completes internal initialization. |
| Telematics Control Unit (TCU) Battery Backup Supervision | ADAS Camera Module Low-Power Wake-Up Circuit |
Use Scenario: Maintains RTC and CAN transceiver operation during ignition-off, switching to coin cell when main battery drops below 9 V. IC Role / Device Role / Timing Role: Supervises backup regulator output (2.5 V) and triggers manual reset via microcontroller GPIO upon battery switchover detection. Use Value: Guarantees clean reset of CAN controller before reinitializing bus arbitration, preventing message loss or node isolation. | Use Scenario: Powers camera sensor only when motion is detected, requiring ultra-low quiescent current during sleep mode. IC Role / Device Role / Timing Role: Acts as primary supervisor for 1.8 V image sensor rail, asserting RESET during wake-up until supply stabilizes, then releasing after 10 ms delay. Use Value: Reduces average system current by >95% versus always-on linear regulators, extending vehicle standby time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3838K33QDBVRQ1 | 3.3 V reset threshold (2.93 V nominal), same package and timing features | Designed for 3.3 V I/O domain supervision instead of 2.5 V core rail | Select when supervising 3.3 V supplies; identical footprint and pinout enable layout reuse |
| TLV809J25DBZR | 2.25 V threshold, push-pull RESET output, 350 nA supply current, no CT pin delay selection | Lacks configurable delay and open-drain flexibility; simpler interface but less timing control | Choose for cost-sensitive non-automotive designs where fixed 200 ms delay suffices and push-pull drive is acceptable |
Compared with TPS3838K33QDBVRQ1, the TPS3838J25QDBVRQ1 offers tighter threshold matching for 2.5 V systems; compared with TLV809J25DBZR, it delivers lower quiescent current and programmable delay-critical for AEC-Q100-compliant battery-backed modules.
Availability
TPS3838J25QDBVRQ1 is available at Aetrix Electronics and suitable for automotive ECU power sequencing, telematics battery backup supervision, and ADAS camera module wake-up circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS3838J25QDBVRQ1 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 delivering analog, embedded processing, and connectivity solutions for automotive, industrial, and consumer markets.
The TPS3838-Q1 family is designed specifically for automotive power-supply monitoring, featuring AEC-Q100 qualification, nanopower consumption, and configurable reset timing to meet stringent functional safety and energy-efficiency requirements.
FAQ
What is the exact reset threshold voltage of the TPS3838J25QDBVRQ1?
The TPS3838J25QDBVRQ1 has a nominal reset threshold voltage of 2.25 V, with a guaranteed range of 2.16 V to 2.30 V at TA = 25°C. This value is factory-trimmed and remains stable across −40°C to 125°C with less than 1% drift, making it suitable for precise supervision of 2.5 V rails in automotive applications.
Does the TPS3838J25QDBVRQ1 support manual reset functionality?
Yes, the TPS3838J25QDBVRQ1 includes a dedicated MR (Manual Reset) pin (Pin 3). It accepts an active-low signal with a minimum pulse width of 1 µs. An internal 30 kΩ pull-up resistor holds MR high when unused, eliminating the need for an external resistor unless active low-level assertion is required.
How is the reset delay time configured on the TPS3838J25QDBVRQ1?
The reset delay time on the TPS3838J25QDBVRQ1 is set via the CT pin (Pin 1): connecting CT to GND selects a typical 10 ms delay, while connecting CT to VDD selects a typical 200 ms delay. The device does not require external components-delay selection is purely hardwired, simplifying design and improving reliability.
What output type does the TPS3838J25QDBVRQ1 use, and why does it matter?
The TPS3838J25QDBVRQ1 uses an active-low open-drain RESET output (Pin 5). This allows wired-OR connection with other reset sources, level translation to different logic voltages via external pull-up, and compatibility with processors requiring open-drain reset inputs-essential for flexible system-level reset architecture in automotive ECUs.
Is the TPS3838J25QDBVRQ1 qualified for automotive applications?
Yes, the TPS3838J25QDBVRQ1 is AEC-Q100 Grade 1 qualified (−40°C to 125°C), manufactured in an IATF 16949-certified facility, and supported with PPAP documentation. It meets automotive reliability standards including ESD protection (>2000 V HBM), extended temperature operation, and lifetime buy availability planning through Texas Instruments.
TPS3838J25QDBVRQ1 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:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 10ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3838J25QDBVRQ1 FAQ
1.How can I place an order for TPS3838J25QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3838J25QDBVRQ1 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 TPS3838J25QDBVRQ1 reliable?
The price and inventory of TPS3838J25QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3838J25QDBVRQ1 is usually 5 days.
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5.How can I obtain technical support or documentation for TPS3838J25QDBVRQ1?
For technical support, including TPS3838J25QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3838J25QDBVRQ1 requirements.
6.How does Aetrix verify that TPS3838J25QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3838J25QDBVRQ1 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 TPS3838J25QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3838J25QDBVRQ1?
All TPS3838J25QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3838J25QDBVRQ1, 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 TPS3838J25QDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3838J25QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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