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Texas Instruments 2U3824-33QDBVRG4Q1
- Part No.:
- 2U3824-33QDBVRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
2U3824-33QDBVRG4Q1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,576
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Product details
Overview
2U3824-33QDBVRG4Q1 from Texas Instruments is an automotive-grade voltage supervisor IC with active-high reset output, 3.3 V supply monitoring threshold, 200 ms power-on reset delay, watchdog timer, and manual reset input - used to ensure reliable boot and runtime supervision of automotive microcontrollers and DSPs.
For engineers reviewing the 2U3824-33QDBVRG4Q1 datasheet, 2U3824-33QDBVRG4Q1 pinout, 2U3824-33QDBVRG4Q1 application, or 2U3824-33QDBVRG4Q1 equivalent, this page delivers verified electrical specs, AEC-Q100 Grade 1 qualification details, SOT-23-5 package mapping, and real-world automotive system integration guidance.
Technical Context
The 2U3824-33QDBVRG4Q1 implements a fixed-threshold (2.84–3.00 V) voltage supervision circuit with hysteresis (50 mV), internal 200 ms delay timer, and watchdog timeout of 1.6 s. It asserts active-high RESET when VDD rises above VIT− + VHYS and maintains it for td after VDD stabilizes.
Its dual-reset architecture supports both power-on initialization and runtime fault recovery: MR forces reset independently of VDD, while WDI requires periodic falling edges to prevent timeout-triggered reset - all within −40°C to 125°C operation and 15 µA typical supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.1 V to 5.5 V - powers device and enables supervision across wide input rails including 3.3 V systems. |
| Threshold Voltage (VIT−) | 2.84–3.00 V at −40°C to 125°C - precisely monitors 3.3 V supply with guaranteed margin against nominal rail. |
| Reset Delay Time (td) | 120–300 ms - ensures stable power-up before releasing processor reset, preventing premature execution. |
| Watchdog Timeout (ttout) | 0.9–2.5 s - detects firmware hangs in automotive ECUs without requiring external timing components. |
| Supply Current (IDD) | 15–25 µA - enables low-power always-on supervision in battery-sensitive automotive modules. |
| Output Type | Active-high push-pull RESET - drives logic-high enable signals directly without pull-up resistors. |
| ESD Rating (HBM) | ±2000 V - meets MIL-STD-883 requirements for robust handling in automotive manufacturing environments. |
Pinout & Package
2U3824-33QDBVRG4Q1 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained automotive PCB layouts and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-high reset output | Push-pull driver capable of sourcing ≥100 µA at 0.8×VDD - directly interfaces with MCU reset-enable pins. |
| 2: GND | Ground reference | Low-impedance return path for internal comparators and output stage; must be connected to system ground plane. |
| 3: MR | Manual reset input | Active-low input with 90 kΩ internal pullup - allows external logic or switch to force system reset regardless of VDD level. |
| 4: WDI | Watchdog timer input | Edge-sensitive input requiring falling edge every <2.5 s - failure triggers RESET assertion for firmware recovery. |
| 5: VDD | Supply and monitored rail | Powers device and serves as supervised voltage source - threshold detection occurs internally without external dividers. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C ambient operation - suitable for engine bay and ADAS ECU deployments. |
| Fixed 3.3 V supervision threshold | No external resistor network required - eliminates BOM cost and layout sensitivity in 3.3 V domain designs. |
| Dual reset capability | Combines power-on reset (200 ms delay) and runtime watchdog (1.6 s timeout) - covers both startup and operational faults. |
| Active-high push-pull output | Eliminates need for external pull-up resistor on RESET line - reduces component count and improves noise immunity. |
| Low quiescent current | 15 µA typical consumption - extends battery life in always-on vehicle subsystems like telematics and body control modules. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance System (ADAS) Camera Module |
|---|---|
Use Scenario: Monitors 3.3 V core supply powering TI C2000 or Infineon AURIX MCU during cold cranking and load dump events. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset and watchdog supervision to prevent MCU lockup during transient voltage dips. Use Value: Guarantees deterministic boot sequence and recovers from firmware stalls without requiring host processor intervention. |
Use Scenario: Ensures reliable startup and runtime supervision of image signal processor (ISP) and SerDes in rear-view camera systems. IC Role / Device Role / Timing Role: Active-high RESET output directly enables ISP power management IC; WDI monitors ISP firmware health. Use Value: Prevents corrupted video output due to silent firmware hangs - critical for functional safety compliance (ISO 26262 ASIL-B). |
| Automotive Infotainment Head Unit | Electric Power Steering (EPS) Control Module |
Use Scenario: Supervises 3.3 V I/O rail feeding application processor and audio codec in head unit mainboard. IC Role / Device Role / Timing Role: Provides synchronized reset release after power stabilization and detects application processor software faults via WDI. Use Value: Eliminates display glitches and audio dropouts caused by partial resets or unresponsive firmware threads. |
Use Scenario: Monitors 3.3 V supply to motor control MCU and CAN transceiver in EPS module under high EMI conditions. IC Role / Device Role / Timing Role: MR pin tied to safety monitor ASIC; RESET output feeds MCU reset pin with active-high logic compatibility. Use Value: Enables fail-safe torque reduction by forcing controlled MCU reset upon detected voltage anomaly or watchdog timeout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3824-33QDBVRQ1 | Same pinout, identical electrical specs, but lacks G4 suffix - not qualified to AEC-Q100 Grade 1; rated only to 105°C. | Not approved for under-hood or safety-critical automotive use; limited to cabin electronics with lower temperature requirements. | Select only if AEC-Q100 Grade 1 qualification is not required and operating ambient stays ≤105°C. |
| MAX6374UT33+T | 3.3 V supervisor with 200 ms delay and watchdog, but uses open-drain active-low output and requires external pull-up. | Needs additional resistor and level-shifting for active-high MCU interfaces; higher board area and BOM cost. | Choose when legacy MAXIM-based designs require drop-in replacement with minimal schematic change. |
Compared with TPS3824-33QDBVRQ1 and MAX6374UT33+T, the 2U3824-33QDBVRG4Q1 uniquely combines AEC-Q100 Grade 1 qualification, active-high push-pull output, and full automotive temperature range - enabling single-source compliance for safety-critical ECUs without design compromises.
Availability
2U3824-33QDBVRG4Q1 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, infotainment head units, and electric power steering systems requiring stable component supply across extended product lifecycles.
Supply support for 2U3824-33QDBVRG4Q1 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 ICs, with decades of experience delivering high-reliability components for mission-critical systems.
The TPS382x-Q1 product line was engineered specifically for automotive voltage supervision - integrating AEC-Q100 qualification, watchdog functionality, and precise threshold accuracy to meet ISO 26262 functional safety readiness requirements.
FAQ
What is the exact supply voltage threshold range for the 2U3824-33QDBVRG4Q1?
The 2U3824-33QDBVRG4Q1 has a guaranteed negative-going input threshold voltage (VIT−) of 2.84 V to 3.00 V over the full −40°C to 125°C operating temperature range, with 50 mV hysteresis - ensuring robust 3.3 V rail supervision even under thermal stress and voltage tolerance variations.
Does the 2U3824-33QDBVRG4Q1 support active-high reset output?
Yes, the 2U3824-33QDBVRG4Q1 provides an active-high push-pull RESET output (pin 1), eliminating the need for external pull-up resistors. This differs from the active-low variants in the same family and simplifies interface with MCUs requiring high-true reset enable signals.
What is the watchdog timeout period for the 2U3824-33QDBVRG4Q1?
The 2U3824-33QDBVRG4Q1 features a watchdog timeout (ttout) of 0.9 s to 2.5 s, with a typical value of 1.6 s. The timer resets on each falling edge at the WDI pin (pin 4); failure to provide such edges within the timeout window triggers an active-high RESET assertion.
Is the 2U3824-33QDBVRG4Q1 qualified for automotive applications?
Yes, the 2U3824-33QDBVRG4Q1 is AEC-Q100 qualified for Device Temperature Grade 1 (−40°C to 125°C), HBM ESD Level 2 (±2000 V), and CDM ESD Level C4B - meeting stringent reliability requirements for automotive powertrain, chassis, and ADAS applications.
What package type does the 2U3824-33QDBVRG4Q1 use?
The 2U3824-33QDBVRG4Q1 uses a 5-pin SOT-23 (DBV) package with nominal dimensions of 2.90 mm × 1.60 mm. This compact, surface-mount package supports automated assembly and is thermally characterized for junction-to-ambient (RθJA = 185°C/W) and junction-to-board (RθJB = 52.4°C/W) performance.
2U3824-33QDBVRG4Q1 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:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 120ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
2U3824-33QDBVRG4Q1 FAQ
1.How can I place an order for 2U3824-33QDBVRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 2U3824-33QDBVRG4Q1 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 2U3824-33QDBVRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2U3824-33QDBVRG4Q1 is usually 5 days.
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6.How does Aetrix verify that 2U3824-33QDBVRG4Q1 is sourced from the original manufacturer or authorized distributors?
All 2U3824-33QDBVRG4Q1 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 2U3824-33QDBVRG4Q1 meets industry standards.
7.What is the process for return or replacement of 2U3824-33QDBVRG4Q1?
All 2U3824-33QDBVRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with 2U3824-33QDBVRG4Q1, 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 2U3824-33QDBVRG4Q1 part is unused and in its original packaging.
Return procedure for 2U3824-33QDBVRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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