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Texas Instruments 2U3824-50QDBVRG4Q1
- Part No.:
- 2U3824-50QDBVRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
2U3824-50QDBVRG4Q1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,039
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Product details
Overview
2U3824-50QDBVRG4Q1 from Texas Instruments is an automotive-grade voltage supervisor IC with active-high and active-low reset outputs, 5.0 V fixed threshold, 200 ms reset delay, watchdog timer input (WDI), and manual reset (MR) capability. It operates from 1.1 V to 5.5 V supply, consumes 15 µA typical current, and is qualified per AEC-Q100 Grade 1 (−40°C to 125°C). It is used for power-on reset and runtime supervision of automotive microcontrollers.
For engineers reviewing the 2U3824-50QDBVRG4Q1 datasheet, 2U3824-50QDBVRG4Q1 pinout, 2U3824-50QDBVRG4Q1 application, or 2U3824-50QDBVRG4Q1 equivalent, key selection criteria include its dual-reset output logic, 5.0 V ±1.2% threshold accuracy over temperature, integrated watchdog timeout (1.6 s), MR assertion timing (<0.1 µs propagation), and SOT-23-5 package compatibility with space-constrained automotive ECUs.
Technical Context
The 2U3824-50QDBVRG4Q1 implements a precision bandgap-based voltage reference with internal hysteresis (50 mV) to reject supply noise during threshold crossing. Its dual-output architecture delivers simultaneous active-low RESET and active-high RESET signals, enabling direct interface with both legacy and modern MCU reset inputs without external inverters.
Watchdog functionality is triggered by edge transitions on WDI; failure to toggle within 1.6 s initiates a full 200 ms reset pulse. The MR input overrides all internal conditions - asserting low forces immediate reset and holds output until MR returns high plus delay time expires.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.1 V to 5.5 V - supports operation during brown-out and battery transients in automotive systems. |
| Threshold Voltage (VIT−) | 4.44 V to 4.64 V at −40°C to 125°C - 5.0 V nominal sense point with ±1.2% tolerance ensures reliable 5 V rail monitoring. |
| Reset Delay Time (td) | 120 ms to 300 ms - fixed 200 ms typical delay guarantees sufficient processor initialization before release. |
| Watchdog Timeout (ttout) | 0.9 s to 2.5 s - 1.6 s typical timeout detects firmware hangs without requiring external timing components. |
| Supply Current (IDD) | 15 µA typical - ultra-low quiescent current extends battery life in always-on vehicle modules. |
| Output Drive Strength | RESET: 3 mA sink / 120 µA source; RESET: 1.2 mA sink / 150 µA source - directly drives standard CMOS reset inputs. |
| ESD Rating | HBM ±2000 V, CDM ±750 V - meets AEC-Q100 stress requirements for harsh automotive environments. |
Pinout & Package
2U3824-50QDBVRG4Q1 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for automated placement and thermal performance in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low push-pull reset output | Asserts low during power-up, brown-out, WDI timeout, or MR activation; no external pull-up required. |
| 2: GND | Ground reference | Primary return path for internal circuitry and output drivers; must be connected to system ground plane. |
| 3: MR | Manual reset input | Active-low asynchronous reset trigger; pulls low to force reset regardless of VDD or WDI state. |
| 4: WDI | Watchdog timer input | Edge-sensitive input - rising or falling edge resets watchdog timer; high-impedance disables watchdog. |
| 5: VDD | Supply voltage input | Powers device and serves as monitored rail; requires local 0.1 µF ceramic decoupling capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Dual active reset outputs | Simultaneous RESET (active-low) and RESET (active-high) eliminate need for external level-shifting or inversion. |
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to 125°C ambient) with HBM ±2000 V ESD rating ensures reliability in engine bay and infotainment applications. |
| Integrated watchdog timer | 1.6 s timeout with edge-triggered WDI input enables autonomous firmware health monitoring without software overhead. |
| Fixed 5.0 V threshold | Factory-trimmed internal divider provides stable 4.55 V typical threshold with <±1.2% variation across temperature and voltage. |
| Low-power operation | 15 µA typical supply current allows continuous supervision in always-on domains such as CAN gateway or body control modules. |
Applications
| Engine Control Unit (ECU) Power Sequencing | ADAS Camera Module Supervision |
|---|---|
Use Scenario: Monitors 5 V domain powering MCU, CAN transceiver, and sensor interface in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Provides power-on reset, brown-out detection, and watchdog supervision with 200 ms delay and 1.6 s timeout. Use Value: Ensures deterministic boot sequence and recovers from lockup events without requiring host processor intervention. |
Use Scenario: Supervises 5 V supply for image signal processor and MIPI interface in rear-view or surround-view camera systems. IC Role / Device Role / Timing Role: Delivers dual-reset signaling compatible with both ISP and SoC reset requirements while monitoring WDI for firmware liveliness. Use Value: Prevents corrupted image capture or video stream freeze by triggering hard reset upon detected software hang. |
| Infotainment Head Unit Boot Integrity | Electric Power Steering (EPS) Safety Monitor |
Use Scenario: Validates stable 5 V rail before releasing application processor and audio codec from reset in automotive head units. IC Role / Device Role / Timing Role: Uses MR input for safe shutdown initiation and WDI for runtime firmware validation during active operation. Use Value: Enables graceful power-down sequencing and prevents UI lockup due to unresponsive middleware or driver faults. |
Use Scenario: Supervises critical 5 V supply feeding motor control MCU and torque sensor interface in EPS systems. IC Role / Device Role / Timing Role: Provides fail-safe reset generation with AEC-Q100 compliance and dual-output redundancy for ASIL-B functional safety paths. Use Value: Supports diagnostic coverage requirements by independently verifying supply integrity and software execution continuity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3824-50-Q1 | Identical electrical specs, pinout, and package; same TI datasheet revision and qualification status. | No functional difference - identical automotive qualification, timing, and output configuration. | Select when standard TI part numbering is required for BOM alignment or procurement traceability. |
| MAX6326–T50 | 5.0 V threshold, 200 ms delay, but only active-low output; no WDI or MR; different pinout (SOT-23-4). | Lacks watchdog and manual reset; unsuitable for systems requiring dual-reset logic or runtime fault recovery. | Consider only for cost-sensitive non-automotive applications where WDI/MR are unused and layout allows pin reassignment. |
Compared with TPS3824-50-Q1, 2U3824-50QDBVRG4Q1 offers identical supervision functionality and automotive qualification, while MAX6326–T50 omits critical watchdog and manual reset features - making it inadequate for safety-critical or firmware-recovery-dependent automotive use cases.
Availability
2U3824-50QDBVRG4Q1 is available at Aetrix Electronics and suitable for automotive engine control, ADAS camera modules, infotainment head units, and electric power steering systems requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for 2U3824-50QDBVRG4Q1 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 specializing in analog and embedded processing technologies, with leadership in automotive electronics, power management, and precision analog solutions.
The TPS382x-xx-Q1 product line was designed specifically for automotive power-supply supervision - delivering robust reset generation, watchdog monitoring, and manual reset capability in compact packages qualified to AEC-Q100 standards.
FAQ
What is the exact threshold voltage range for 2U3824-50QDBVRG4Q1 across temperature?
The 2U3824-50QDBVRG4Q1 has a negative-going input threshold voltage (VIT−) ranging from 4.44 V to 4.64 V over the full −40°C to 125°C operating temperature range, with a typical value of 4.55 V at 25°C. This 5.0 V nominal threshold is factory-trimmed and specified with ±1.2% tolerance, ensuring consistent 5 V rail monitoring under automotive thermal stress conditions.
Does 2U3824-50QDBVRG4Q1 support both active-high and active-low reset outputs simultaneously?
Yes, 2U3824-50QDBVRG4Q1 provides simultaneous active-low RESET and active-high RESET outputs in push-pull configuration. Both signals assert/deassert in lockstep - RESET goes low while RESET goes high during reset assertion, eliminating need for external inverters or level translators in mixed-logic systems.
How does the watchdog timer in 2U3824-50QDBVRG4Q1 behave when the WDI pin is left unconnected?
When WDI is left floating (high-impedance), the 2U3824-50QDBVRG4Q1 detects this condition and internally generates periodic pulses to prevent unintended reset assertion. To fully disable watchdog functionality, tie WDI to VDD via a 1 kΩ resistor - this ensures the device recognizes a static high state and ignores WDI transitions.
What is the recommended decoupling for 2U3824-50QDBVRG4Q1 VDD pin?
A 0.1 µF ceramic capacitor must be placed as close as possible to the VDD pin of 2U3824-50QDBVRG4Q1, with short, low-inductance traces to GND. This minimizes supply noise coupling into the threshold comparator and prevents false resets during fast transients - a requirement explicitly stated in TI's layout guidelines for automotive reliability.
Is 2U3824-50QDBVRG4Q1 pin-compatible with other TPS382x-xx-Q1 variants?
Yes, all TPS382x-xx-Q1 devices including 2U3824-50QDBVRG4Q1 use the same 5-pin SOT-23 (DBV) package with identical pinout: Pin 1 = RESET, Pin 2 = GND, Pin 3 = MR, Pin 4 = WDI, Pin 5 = VDD. Threshold voltage, delay time, and output logic type vary by suffix, but mechanical and electrical interface remains consistent across the family.
2U3824-50QDBVRG4Q1 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:
- 4.55V
- 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
2U3824-50QDBVRG4Q1 FAQ
1.How can I place an order for 2U3824-50QDBVRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 2U3824-50QDBVRG4Q1 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 2U3824-50QDBVRG4Q1 reliable?
The price and inventory of 2U3824-50QDBVRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2U3824-50QDBVRG4Q1 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2U3824-50QDBVRG4Q1 transactions.
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2U3824-50QDBVRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2U3824-50QDBVRG4Q1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 2U3824-50QDBVRG4Q1?
For technical support, including 2U3824-50QDBVRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2U3824-50QDBVRG4Q1 requirements.
6.How does Aetrix verify that 2U3824-50QDBVRG4Q1 is sourced from the original manufacturer or authorized distributors?
All 2U3824-50QDBVRG4Q1 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 2U3824-50QDBVRG4Q1 meets industry standards.
7.What is the process for return or replacement of 2U3824-50QDBVRG4Q1?
All 2U3824-50QDBVRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with 2U3824-50QDBVRG4Q1, 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 2U3824-50QDBVRG4Q1 part is unused and in its original packaging.
Return procedure for 2U3824-50QDBVRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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