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Texas Instruments 2U3823-33QDBVRG4Q1
- Part No.:
- 2U3823-33QDBVRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
2U3823-33QDBVRG4Q1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:417
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Product details
Overview
2U3823-33QDBVRG4Q1 from Texas Instruments is an automotive-grade voltage supervisor IC with integrated watchdog timer, active-low push-pull RESET output, manual reset (MR) input, and fixed 3.3 V supply monitoring threshold. It provides 200 ms power-on reset delay, operates from −40°C to 125°C, and consumes 15 µA typical supply current - used for reliable power-up sequencing and runtime fault detection in automotive microcontrollers.
For engineers reviewing the 2U3823-33QDBVRG4Q1 datasheet, 2U3823-33QDBVRG4Q1 pinout, 2U3823-33QDBVRG4Q1 application, or 2U3823-33QDBVRG4Q1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, 2.93 V nominal threshold with ±70 mV hysteresis, 1.6 s watchdog timeout, MR-triggered reset propagation under 0.1 µs, and SOT-23-5 package compatibility with space-constrained automotive ECUs.
Technical Context
The 2U3823-33QDBVRG4Q1 implements a precision bandgap-based voltage reference feeding a comparator with internal hysteresis (50 mV), coupled to a digital state machine that controls both power-on reset timing and watchdog timer logic. Its MR input directly forces reset assertion independent of VDD level, while WDI accepts edge-triggered watchdog pulses to prevent spurious resets.
It uses a fixed internal voltage divider to set VIT− = 2.93 V (nominal) at 25°C, with temperature coefficient of ±0.01%/°C over −40°C to 125°C, and integrates a 200 ms monostable delay circuit triggered after VDD crosses VIT− + VHYS. The push-pull RESET output drives low to 0.4 V at 1.2 mA sink current and high to ≥0.8 × VDD at −20 µA source current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.1 V to 5.5 V - supports brown-in/brown-out detection across wide input rails including 3.3 V systems with tolerance margin |
| Threshold Voltage (VIT−) | 2.84 V to 3.00 V (−40°C to 125°C) - ensures robust 3.3 V rail supervision with guaranteed margin against noise-induced false triggers |
| Reset Delay Time (td) | 120 ms to 300 ms - guarantees full microcontroller initialization before release of active-low RESET signal |
| Watchdog Timeout (ttout) | 0.9 s to 2.5 s - provides sufficient time for firmware execution cycles while detecting lockup within defined safety window |
| Supply Current (IDD) | 15 µA typical - enables always-on monitoring in battery-backed automotive modules without significant quiescent drain |
| Input Hysteresis (Vhys) | 50 mV - prevents oscillation during slow-rising/falling supply transitions near threshold |
| Operating Temperature | −40°C to 125°C - meets AEC-Q100 Grade 1 requirements for under-hood and powertrain applications |
Pinout & Package
Package: 5-pin SOT-23 (DBV), body size 2.90 mm × 1.60 mm, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low push-pull output | Drives microcontroller reset pin low during fault; no external pull-up required; sinks 1.2 mA minimum |
| 2: GND | Ground reference | Primary return path for internal circuitry and output stage; must be connected to system ground plane |
| 3: MR | Manual reset input | Active-low asynchronous reset trigger; internal 52 kΩ pullup; requires <0.3×VDD to assert reset |
| 4: WDI | Watchdog timer input | Edge-sensitive (rising/falling); must be toggled within 0.9–2.5 s to prevent reset; high-impedance when unused |
| 5: VDD | Supply and monitored rail | Powers device and serves as input to threshold comparator; bypass capacitor (100 nF ceramic) required near pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C operation with HBM ESD ≥2000 V and CDM ≥750 V - suitable for automotive powertrain and chassis modules |
| Integrated watchdog timer | 1.6 s nominal timeout with edge-triggered WDI input - detects software hangs without requiring external timing components |
| Fixed 3.3 V threshold with hysteresis | 2.93 V nominal VIT− with 50 mV hysteresis - eliminates need for external resistor divider while rejecting supply ripple |
| Low-power operation | 15 µA typical IDD - enables continuous supervision in always-on domains such as CAN gateway or body control modules |
| Manual reset with internal pullup | 52 kΩ internal MR pullup - simplifies board design by removing external resistor; supports direct connection to open-drain logic |
Applications
| Automotive Engine Control Unit (ECU) | ADAS Camera Module Power Management |
|---|---|
Use Scenario: Monitors 3.3 V domain powering MCU, CAN transceiver, and sensor interface in gasoline/diesel engine controllers. IC Role / Device Role / Timing Role: Provides power-on reset assertion until stable 3.3 V is reached, then asserts watchdog timeout if firmware fails to toggle WDI. Use Value: Ensures deterministic boot sequence and runtime fault recovery per ISO 26262 ASIL-B requirements. |
Use Scenario: Supervises 3.3 V supply for image signal processor and MIPI interface in surround-view camera systems. IC Role / Device Role / Timing Role: Generates 200 ms reset pulse on power-up and monitors WDI from ISP firmware loop. Use Value: Prevents corrupted image streaming due to undervoltage or software lockup, improving system functional safety. |
| Electric Vehicle Battery Management System (BMS) | Automotive Infotainment Head Unit |
Use Scenario: Controls reset timing for 3.3 V auxiliary MCU supervising cell monitoring ICs and isolation gate drivers. IC Role / Device Role / Timing Role: Delays MCU enable until main 12 V rail stabilizes and 3.3 V LDO reaches regulation. Use Value: Eliminates race conditions between analog front-end calibration and digital controller startup. |
Use Scenario: Manages power sequencing and watchdog supervision for application processor and audio codec in head units. IC Role / Device Role / Timing Role: Asserts RESET during cold crank (low VDD) and detects firmware hang via WDI polling. Use Value: Reduces field returns caused by unresponsive UI due to software faults during vehicle start-stop cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3823-33-Q1 | Same functional specification, identical pinout and electrical behavior; 2U3823-33QDBVRG4Q1 is TI's orderable part number variant for this device | No functional difference; both qualified for automotive use and share identical AEC-Q100 test reports | Select 2U3823-33QDBVRG4Q1 for TI-authorized distribution channels with full traceability and extended warranty coverage |
| TPS3824-33-Q1 | Includes dual active-high (RESET) and active-low (RESET) outputs; same 3.3 V threshold and 200 ms delay but no MR pin | Suitable where system requires simultaneous high- and low-active reset signals, e.g., mixed-voltage SoC interfaces | Choose TPS3824-33-Q1 only if dual-output logic is required; otherwise 2U3823-33QDBVRG4Q1 offers MR flexibility with identical footprint |
Compared with TPS3823-33-Q1, 2U3823-33QDBVRG4Q1 is functionally identical but carries TI's enhanced logistics identifier for automotive OEM procurement; versus TPS3824-33-Q1, it retains MR capability at the cost of single-output logic - making it optimal for legacy MCU designs requiring manual reset override.
Availability
2U3823-33QDBVRG4Q1 is available at Aetrix Electronics and suitable for automotive engine control, ADAS camera modules, and battery management systems requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for 2U3823-33QDBVRG4Q1 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 company designing analog and embedded processing solutions for automotive, industrial, and communications markets.
The TPS382x-Q1 product line delivers AEC-Q100-qualified voltage supervisors with integrated watchdog timers specifically for automotive microcontroller power sequencing and functional safety-critical reset management.
FAQ
What is the exact supply voltage threshold of the 2U3823-33QDBVRG4Q1?
The 2U3823-33QDBVRG4Q1 has a nominal negative-going input threshold voltage (VIT−) of 2.93 V at 25°C, specified from 2.84 V to 3.00 V across the full −40°C to 125°C operating range. This fixed threshold is internally generated and calibrated for 3.3 V rail supervision without external components.
Does the 2U3823-33QDBVRG4Q1 require external components for basic operation?
No, the 2U3823-33QDBVRG4Q1 requires only a 100 nF ceramic bypass capacitor on the VDD pin for stable operation. All threshold references, timing circuits, and pullup resistors (e.g., 52 kΩ on MR) are integrated - eliminating external resistors, capacitors, or diodes needed in discrete supervisor designs.
How does the watchdog timer in the 2U3823-33QDBVRG4Q1 function?
The 2U3823-33QDBVRG4Q1 watchdog timer times out after 0.9 s to 2.5 s if the WDI pin receives no rising or falling edge. Upon timeout, RESET asserts for 120–300 ms. The timer resets on each valid WDI transition or when RESET is actively driven low, enabling robust detection of firmware hangs in automotive MCUs.
Is the 2U3823-33QDBVRG4Q1 pin-compatible with other TPS382x-Q1 devices?
Yes, the 2U3823-33QDBVRG4Q1 uses the standard 5-pin SOT-23 (DBV) package and shares identical pinout with all TPS382x-xx-Q1 variants including TPS3820/3/4/5/8-33-Q1. Pin 1 is RESET, Pin 2 is GND, Pin 3 is MR, Pin 4 is WDI, and Pin 5 is VDD - enabling drop-in replacement within the same family.
What automotive qualification standards does the 2U3823-33QDBVRG4Q1 meet?
The 2U3823-33QDBVRG4Q1 is fully qualified to AEC-Q100 Grade 1 (−40°C to 125°C), with HBM ESD rating ≥2000 V and CDM ESD rating ≥750 V. It also exceeds MIL-STD-883 requirements for ESD protection and is characterized for use in safety-critical automotive systems compliant with ISO 26262.
2U3823-33QDBVRG4Q1 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
2U3823-33QDBVRG4Q1 FAQ
1.How can I place an order for 2U3823-33QDBVRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 2U3823-33QDBVRG4Q1 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 2U3823-33QDBVRG4Q1 reliable?
The price and inventory of 2U3823-33QDBVRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2U3823-33QDBVRG4Q1 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2U3823-33QDBVRG4Q1 transactions.
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2U3823-33QDBVRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2U3823-33QDBVRG4Q1 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 2U3823-33QDBVRG4Q1?
For technical support, including 2U3823-33QDBVRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2U3823-33QDBVRG4Q1 requirements.
6.How does Aetrix verify that 2U3823-33QDBVRG4Q1 is sourced from the original manufacturer or authorized distributors?
All 2U3823-33QDBVRG4Q1 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 2U3823-33QDBVRG4Q1 meets industry standards.
7.What is the process for return or replacement of 2U3823-33QDBVRG4Q1?
All 2U3823-33QDBVRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with 2U3823-33QDBVRG4Q1, 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 2U3823-33QDBVRG4Q1 part is unused and in its original packaging.
Return procedure for 2U3823-33QDBVRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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