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Texas Instruments TPS3824-25QDBVRQ1
- Part No.:
- TPS3824-25QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3824-25QDBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,135
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Product details
Overview
TPS3824-25QDBVRQ1 from Texas Instruments is an automotive-grade processor supervisory circuit with active-high reset output, 2.25 V supply voltage supervision threshold, 200 ms power-on reset delay, and integrated watchdog timer. It monitors VDD in DSP/microcontroller systems, asserts RESET during brownout or startup, and supports manual reset via MR pin. Used in automotive ECUs requiring AEC-Q100 compliance and robust power sequencing.
For engineers reviewing the TPS3824-25QDBVRQ1 datasheet, TPS3824-25QDBVRQ1 pinout, TPS3824-25QDBVRQ1 application, or TPS3824-25QDBVRQ1 equivalent, key selection criteria include its active-high RESET logic, −40°C to 125°C operation, fixed 2.25 V threshold, SOT23-5 package compatibility, and watchdog timeout of 1.6 s (typ).
Technical Context
The TPS3824-25QDBVRQ1 implements a precision bandgap-based voltage supervisor with 30 mV hysteresis and internal 200 ms reset delay timer. Its RESET output transitions high only after VDD exceeds 2.25 V and remains stable for ≥200 ms, preventing premature processor release.
It integrates a watchdog timer triggered by WDI transitions, with 1.6 s typical timeout; leaving WDI unconnected disables watchdog functionality. The device uses an internal voltage divider for threshold setting and requires no external components for basic supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Threshold | 2.25 V (VIT−), with ±0.04 V tolerance over −40°C to 125°C - ensures reliable reset assertion at precise 2.5 V rail undervoltage |
| Reset Delay Time | 200 ms (typ), fixed internal timer - guarantees sufficient processor initialization time after power stabilization |
| Watchdog Timeout | 1.6 s (typ), triggered by WDI edge - detects firmware lockup in safety-critical automotive control loops |
| RESET Polarity | Active-high output - directly interfaces with processors requiring high-level reset assertion (e.g., certain MSP430 variants) |
| Supply Current | 15 μA (typ) at VDD = 3.3 V - enables low-power operation in battery-backed or always-on automotive modules |
| Operating Temperature | −40°C to 125°C - qualified per AEC-Q100 Grade 1 for under-hood and transmission control applications |
| ESD Rating | 2000 V HBM - meets automotive ESD robustness requirements for harsh vehicle environments |
Pinout & Package
SOT23-5 package (DBV drawing), 5-pin surface-mount, 1.6 mm × 2.9 mm footprint, 1.1 mm height, RoHS-compliant green finish, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high reset output | Drives high when VDD ≥ 2.25 V and delay complete; sinks 1 mA max for low-state pull-down |
| 2 - GND | Ground reference | Return path for all internal circuits; must be connected to system ground plane with low-inductance trace |
| 3 - RESET | Duplicate RESET output | Second bond-out of same active-high RESET signal - allows fanout to multiple ICs without external buffer |
| 4 - VDD | Power supply input | Accepts 1.1 V to 5.5 V; internal regulator powers supervisor core; bypass capacitor required at pin |
| 5 - WDI | Watchdog input | Edge-sensitive (rising/falling); toggling within 1.6 s prevents RESET assertion; open = watchdog disabled |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Stress-tested for automotive use across −40°C to 125°C ambient - eliminates qualification effort for Tier 1 suppliers |
| Fixed 200 ms reset delay | No external RC timing components needed - reduces BOM count and layout area in space-constrained ECUs |
| Dual RESET outputs | Pins 1 and 3 both deliver identical active-high RESET - simplifies routing to microcontroller and companion ASIC |
| Watchdog with 1.6 s timeout | Configurable via WDI pin toggling - provides fail-safe recovery for real-time control firmware without software overhead |
| 2.25 V threshold accuracy | ±2% over temperature - ensures deterministic reset behavior across battery voltage sag (e.g., cold-crank 6 V → 2.4 V) |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance System (ADAS) Camera Module |
|---|---|
Use Scenario: Monitors 2.5 V domain powering MCU and CAN transceiver during engine start-stop cycles. IC Role / Device Role / Timing Role: Supervises VDD, asserts active-high RESET until stable, then enables MCU boot sequence after 200 ms. Use Value: Prevents erratic MCU operation during battery voltage dip to 2.4 V; dual RESET pins drive both MCU and safety monitor ASIC simultaneously. | Use Scenario: Ensures clean boot and runtime watchdog supervision for image sensor processor in rear-view camera. IC Role / Device Role / Timing Role: Provides power-on reset and periodic firmware health check via WDI toggling from processor GPIO. Use Value: Guarantees camera initialization before video stream starts; 1.6 s watchdog timeout matches frame-processing loop timing. |
| Electric Power Steering (EPS) Controller | Body Control Module (BCM) |
Use Scenario: Supervises 2.5 V rail feeding torque-sensing ADC and motor gate driver logic. IC Role / Device Role / Timing Role: Detects undervoltage during high-current motor actuation and triggers safe shutdown via active-high RESET. Use Value: 30 mV hysteresis prevents chatter during marginal 2.5 V rail recovery; AEC-Q100 qualification ensures reliability in steering-critical function. | Use Scenario: Manages reset sequencing for multi-rail 2.5 V/3.3 V subsystem controlling door locks, lighting, and HVAC. IC Role / Device Role / Timing Role: Generates synchronized active-high RESET for 2.5 V domain while interfacing with 3.3 V logic via level-shifted MR input. Use Value: Eliminates need for discrete level shifter; 15 μA quiescent current extends battery life in sleep-mode BCM states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar processor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3823-25QDBVRQ1 | Active-low RESET output; identical 2.25 V threshold, 200 ms delay, and watchdog | Requires inverted reset logic on MCU side; not drop-in for active-high interface | Select when target processor accepts active-low reset and board layout cannot accommodate level-shifting |
| TPS3824-30QDBVRQ1 | 2.63 V threshold instead of 2.25 V; same package, pinout, and features | Designed for 3.0 V supply monitoring rather than 2.5 V; unsuitable for 2.5 V brownout detection | Choose only if system operates at 3.0 V nominal and requires tighter margin above 2.63 V |
Compared with TPS3823-25QDBVRQ1 and TPS3824-30QDBVRQ1, the TPS3824-25QDBVRQ1 uniquely delivers active-high reset at precisely 2.25 V - essential for direct interfacing with 2.5 V domain processors without external inversion or voltage translation.
Availability
TPS3824-25QDBVRQ1 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, electric power steering systems, body control modules, and infotainment head units requiring stable component supply across extended temperature ranges.
Supply support for TPS3824-25QDBVRQ1 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, embedded processing, and automotive ICs, with decades of leadership in power management and system supervision solutions.
The TPS382x-Q1 product line delivers AEC-Q100-qualified supervisory circuits for automotive DSP, MCU, and microprocessor power sequencing - engineered for reliability in under-hood, chassis, and safety-critical domains.
FAQ
What is the reset output polarity of the TPS3824-25QDBVRQ1?
The TPS3824-25QDBVRQ1 features an active-high RESET output. Pin 1 and Pin 3 both deliver the same active-high signal, which transitions high only after VDD rises above 2.25 V and remains stable for the full 200 ms delay period. This eliminates the need for external inverters when interfacing with processors that require high-level reset assertion, such as select MSP430 and C2000 devices.
Does the TPS3824-25QDBVRQ1 require external components to operate?
No, the TPS3824-25QDBVRQ1 operates autonomously with no external timing components. A 0.1 μF ceramic bypass capacitor is recommended at the VDD pin for noise immunity, but the 2.25 V threshold, 200 ms reset delay, and 1.6 s watchdog timeout are all internally generated. The MR pin may be left open (internally pulled up) if manual reset is unused, and WDI can be left floating to disable the watchdog.
What is the watchdog timeout specification for the TPS3824-25QDBVRQ1?
The watchdog timeout for the TPS3824-25QDBVRQ1 is 1.6 s (typical), with a range of 0.9 s to 2.5 s over temperature and voltage. It is triggered by any rising or falling edge on the WDI pin; failure to toggle WDI within this interval causes the active-high RESET output to assert. Leaving WDI unconnected disables the watchdog function entirely, preserving default power-on reset behavior.
Is the TPS3824-25QDBVRQ1 pin-compatible with other TPS382x-Q1 devices?
Yes, the TPS3824-25QDBVRQ1 shares identical SOT23-5 (DBV) pinout and package dimensions with all TPS382x-Q1 family members, including TPS3820/23/25/28 variants. Pins 1–5 map consistently to RESET, GND, RESET, VDD, and WDI across the family. However, RESET polarity (active-high vs. active-low) and threshold voltage differ between part numbers - electrical compatibility must be verified per application.
What automotive qualification does the TPS3824-25QDBVRQ1 meet?
The TPS3824-25QDBVRQ1 is qualified per AEC-Q100 Grade 1, rated for operation from −40°C to +125°C ambient temperature. It undergoes stress testing for HTOL, TC, UHAST, and ESD (2000 V HBM), and is manufactured in TI's IATF 16949-certified facilities. This qualification supports deployment in powertrain, chassis, and ADAS applications where functional safety and long-term reliability are mandatory.
TPS3824-25QDBVRQ1 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:
- Push-Pull, Totem Pole
- Reset:
- Active High/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
TPS3824-25QDBVRQ1 FAQ
1.How can I place an order for TPS3824-25QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3824-25QDBVRQ1 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 TPS3824-25QDBVRQ1 reliable?
The price and inventory of TPS3824-25QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3824-25QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3824-25QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3824-25QDBVRQ1 transactions.
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4.How is shipping managed for TPS3824-25QDBVRQ1?
TPS3824-25QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3824-25QDBVRQ1 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 TPS3824-25QDBVRQ1?
For technical support, including TPS3824-25QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3824-25QDBVRQ1 requirements.
6.How does Aetrix verify that TPS3824-25QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3824-25QDBVRQ1 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 TPS3824-25QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3824-25QDBVRQ1?
All TPS3824-25QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3824-25QDBVRQ1, 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 TPS3824-25QDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3824-25QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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