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Texas Instruments 2U3838K33QDBVRG4Q1
- Part No.:
- 2U3838K33QDBVRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
2U3838K33QDBVRG4Q1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,734
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Product details
Overview
2U3838K33QDBVRG4Q1 from Texas Instruments is an automotive-grade nanosupervisory circuit with 2.93 V fixed reset threshold, open-drain active-low RESET output, 220 nA typical supply current, 10 ms/200 ms selectable power-on reset delay, and operation from −40°C to 125°C in a 5-pin SOT-23 (DBV) package. It monitors 3.3 V rail integrity in battery-powered automotive microcontrollers and low-power DSPs.
For engineers reviewing the 2U3838K33QDBVRG4Q1 datasheet, 2U3838K33QDBVRG4Q1 pinout, 2U3838K33QDBVRG4Q1 application, or 2U3838K33QDBVRG4Q1 equivalent, key selection criteria include its open-drain RESET topology, manual reset (MR) support, CT-pin programmable delay, automotive AEC-Q100 qualification, and compatibility with 3.3 V system rails requiring precise voltage supervision under extreme temperature conditions.
Technical Context
The 2U3838K33QDBVRG4Q1 implements a precision bandgap-based voltage reference and internal hysteresis (40 mV) to ensure stable reset assertion/deassertion during supply transients. Its reset logic integrates a refresh timer that initiates only after VDD exceeds the 2.93 V threshold and remains above it for the selected delay period.
Delay time is configured via the CT pin: grounded for 10 ms (typ), tied to VDD for 200 ms (typ). The open-drain RESET output supports wired-OR configurations and external pull-up flexibility, while MR enables asynchronous system reset independent of supply voltage level.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.93 V (typ); precisely supervises 3.3 V rails with ±3% tolerance over temperature |
| Supply Current | 220 nA (typ) at VDD > 3 V; enables multi-year battery life in always-on automotive modules |
| Reset Output Type | Active-low open-drain; allows shared RESET bus and flexible pull-up voltage selection |
| Power-On Reset Delay | Selectable 10 ms (CT = GND) or 200 ms (CT = VDD); ensures reliable processor initialization timing |
| Operating Temperature | −40°C to 125°C; qualified per AEC-Q100 Grade 1 for under-hood automotive applications |
| Hysteresis | 40 mV (typ); prevents oscillatory reset behavior during slow-rising or noisy supply ramps |
| Manual Reset Input | Active-low MR pin with internal 30 kΩ pullup; supports pushbutton-initiated system reset without external components |
Pinout & Package
2U3838K33QDBVRG4Q1 is housed in a 5-pin SOT-23 (DBV) package - 2.9 mm × 1.6 mm footprint, 1.45 mm max height, RoHS-compliant matte tin lead finish, MSL Level-1, tape-and-reel (3000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CT | Delay Configuration | Selects reset delay: GND = 10 ms, VDD = 200 ms; high-impedance input draws <25 nA |
| 2 - GND | Ground Reference | Primary return path for internal reference and output stage; must be low-impedance |
| 3 - MR | Manual Reset Input | Active-low asynchronous reset trigger; internally pulled up to VDD (30 kΩ) |
| 4 - VDD | Supply Input | Monitored 3.3 V rail input; operates from 1.6 V to 6 V; requires local 0.1 µF ceramic bypass |
| 5 - RESET | Open-Drain Output | Active-low reset signal; requires external pull-up; sinks up to 2 mA (max) |
Key Features
| Feature | Design Value |
|---|---|
| Nanosupply Current | 220 nA typical supply current enables >10-year battery operation in always-on telematics modules |
| Automotive Qualification | AEC-Q100 Grade 1 qualified with ESD protection exceeding 2 kV HBM and 200 V MM |
| Fixed Threshold Accuracy | ±3% threshold tolerance over full temperature range ensures robust 3.3 V rail monitoring |
| Configurable Reset Timing | Pin-selectable 10 ms / 200 ms delay eliminates need for external RC timing networks |
| Open-Drain Flexibility | Allows RESET bus sharing across multiple ICs and interface with diverse logic families (3.3 V, 5 V, 1.8 V) |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Supervision of 3.3 V domain powering MCU, CAN transceiver, and sensor interface in engine bay environments. IC Role / Device Role / Timing Role: Monitors VDD rise/fall to assert RESET until stable 3.3 V is established; provides 200 ms delay for flash memory initialization. Use Value: Prevents MCU lockup during cold cranking by ensuring reset remains asserted until supply settles above 2.93 V with 40 mV hysteresis. |
Use Scenario: Power sequencing and fault recovery in radar processing units operating at −40°C to 125°C. IC Role / Device Role / Timing Role: Generates clean, glitch-free reset pulse synchronized to 3.3 V rail; MR pin enables diagnostic-triggered reinitialization. Use Value: Enables deterministic startup after brownout events without software intervention, critical for ASIL-B functional safety compliance. |
| Telematics Control Unit (TCU) | Automotive Infotainment System |
Use Scenario: Always-on GPS/GNSS module powered by lithium coin cell with ultra-low quiescent current requirement. IC Role / Device Role / Timing Role: Provides power-on reset with 10 ms delay and maintains <250 nA sleep current during battery backup mode. Use Value: Extends battery life beyond 7 years while guaranteeing reliable wake-up and initialization upon main power restoration. |
Use Scenario: Supervision of application processor core voltage (3.3 V) during ignition cycle transitions in head unit systems. IC Role / Device Role / Timing Role: Detects undervoltage on 3.3 V rail and asserts open-drain RESET to coordinate shutdown with PMIC and audio codec. Use Value: Eliminates audio pop/click artifacts by synchronizing reset assertion with power rail collapse, improving user experience. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3838K33QDBVRQ1 | Identical electrical specs, same DBV package, identical marking code PDVQ; differs only in reel packaging variant (Q1 vs G4Q1 suffix) | No functional difference; both qualified for automotive use with identical temperature and reliability specs | Select TPS3838K33QDBVRQ1 if standard TI reel packaging is preferred; 2U3838K33QDBVRG4Q1 is functionally identical with alternate tape-and-reel configuration |
| TPS3836K33QDBVRQ1 | Same threshold (2.93 V), package, and temp range, but push-pull (not open-drain) RESET output | Cannot share RESET bus; requires dedicated net; incompatible with wired-OR architectures or mixed-voltage pull-ups | Choose 2U3838K33QDBVRG4Q1 when system-level RESET arbitration or flexible voltage-level interfacing is required |
Compared with TPS3838K33QDBVRQ1, 2U3838K33QDBVRG4Q1 offers identical supervision performance with alternate packaging logistics; versus TPS3836K33QDBVRQ1, it provides essential open-drain flexibility for multi-IC reset coordination in complex automotive domains.
Availability
2U3838K33QDBVRG4Q1 is available at Aetrix Electronics and suitable for automotive ECU, ADAS sensor fusion, telematics, infotainment, and body control module designs requiring stable component supply with AEC-Q100 compliance and long-term lifecycle assurance.
Supply support for 2U3838K33QDBVRG4Q1 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 and embedded processing solutions, with over 90 years of innovation in power management, signal chain, and automotive electronics.
The TPS3838-Q1 family was designed specifically for automotive voltage supervision-emphasizing nanosupply current, wide temperature operation, and robust reset timing-to enable reliable startup and fault recovery in safety-critical vehicle subsystems.
FAQ
What is the exact reset threshold voltage of the 2U3838K33QDBVRG4Q1?
The 2U3838K33QDBVRG4Q1 has a nominal reset threshold voltage of 2.93 V, with a guaranteed range of 2.82 V to 3.10 V across −40°C to 125°C. This value is factory-trimmed and fixed for the K33 variant, enabling precise supervision of 3.3 V rails without external resistive dividers.
Does the 2U3838K33QDBVRG4Q1 support manual reset functionality?
Yes, the 2U3838K33QDBVRG4Q1 includes a dedicated MR (Manual Reset) pin (Pin 3) that provides active-low asynchronous reset capability. When pulled low, it forces the open-drain RESET output active regardless of VDD level, and it features an internal 30 kΩ pullup resistor to VDD for default high state.
How is the power-on reset delay configured on the 2U3838K33QDBVRG4Q1?
The 2U3838K33QDBVRG4Q1 uses the CT pin (Pin 1) to select delay time: connecting CT to GND yields a typical 10 ms delay, while connecting CT to VDD yields a typical 200 ms delay. No external components are needed-the internal timer automatically starts once VDD exceeds the 2.93 V threshold.
What package type and dimensions does the 2U3838K33QDBVRG4Q1 use?
The 2U3838K33QDBVRG4Q1 uses the SOT-23 (DBV) package: 5-pin, 2.9 mm × 1.6 mm body size, 1.45 mm maximum height, with gull-wing leads. It is supplied in tape-and-reel format (3000 units per reel) and complies with JEDEC MO-178 and AEC-Q100 mechanical requirements.
Is the 2U3838K33QDBVRG4Q1 qualified for automotive applications?
Yes, the 2U3838K33QDBVRG4Q1 is AEC-Q100 Grade 1 qualified (−40°C to 125°C), features automotive-specific reliability testing, and includes ESD protection exceeding 2000 V HBM and 200 V MM. It is manufactured and tested to meet TI's automotive quality standards for under-hood and cabin applications.
2U3838K33QDBVRG4Q1 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:
- 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- 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
2U3838K33QDBVRG4Q1 FAQ
1.How can I place an order for 2U3838K33QDBVRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 2U3838K33QDBVRG4Q1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of 2U3838K33QDBVRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2U3838K33QDBVRG4Q1 is usually 5 days.
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5.How can I obtain technical support or documentation for 2U3838K33QDBVRG4Q1?
For technical support, including 2U3838K33QDBVRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2U3838K33QDBVRG4Q1 requirements.
6.How does Aetrix verify that 2U3838K33QDBVRG4Q1 is sourced from the original manufacturer or authorized distributors?
All 2U3838K33QDBVRG4Q1 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 2U3838K33QDBVRG4Q1 meets industry standards.
7.What is the process for return or replacement of 2U3838K33QDBVRG4Q1?
All 2U3838K33QDBVRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with 2U3838K33QDBVRG4Q1, 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 2U3838K33QDBVRG4Q1 part is unused and in its original packaging.
Return procedure for 2U3838K33QDBVRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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