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Texas Instruments TPS3824-50QDBVRQ1
- Part No.:
- TPS3824-50QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3824-50QDBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,197
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Product details
Overview
TPS3824-50QDBVRQ1 from Texas Instruments is an automotive-grade voltage supervisor IC with active-high reset output, 4.55 V fixed threshold, 200 ms power-on reset delay, watchdog timer input (WDI), and 15 µA typical supply current. It monitors 5 V supply rails in DSP/microcontroller systems to ensure reliable power-up sequencing and fault recovery in engine control units and ADAS modules.
For engineers reviewing the TPS3824-50QDBVRQ1 datasheet, TPS3824-50QDBVRQ1 pinout, TPS3824-50QDBVRQ1 application, or TPS3824-50QDBVRQ1 equivalent, this page delivers verified electrical specs, AEC-Q100 Grade 1 qualification details, SOT-23-5 package mapping, and functional alternatives for automotive reset supervision design.
Technical Context
The TPS3824-50QDBVRQ1 implements a precision bandgap-based voltage reference with internal resistor divider to set VIT− = 4.55 V (±2.2% over −40°C to 125°C). Its watchdog timer requires periodic falling-edge transitions on WDI within 1.6 s to prevent reset assertion, and its internal 200 ms delay timer begins only after VDD exceeds VIT− + VHYS (50 mV hysteresis).
It features dual reset outputs: active-low RESET (push-pull) and active-high RESET (push-pull), enabling direct interface with microcontrollers requiring either polarity. No external components are needed for basic supervision, and MR is omitted-confirming absence of manual reset functionality per device-specific pinout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT− Threshold | 4.55 V nominal (4.44–4.64 V range); ensures reliable 5 V rail monitoring with margin against ripple and dropout. |
| Reset Delay Time (td) | 200 ms fixed; guarantees sufficient hold time for processor initialization before release of active-high RESET signal. |
| Watchdog Timeout (ttout) | 1.6 s (0.9–2.5 s range); provides robust system-level fault detection window for firmware hang recovery. |
| Supply Current (IDD) | 15 µA typical; enables low-power operation in always-on automotive domains without battery drain concerns. |
| Output Drive Strength | IOH = –120 µA at VDD ≥ VIT− + 0.2 V; supports direct connection to MCU reset inputs without external pull-up. |
| Operating Temperature | −40°C to 125°C; qualified per AEC-Q100 Grade 1 for under-hood and safety-critical vehicle subsystems. |
| ESD Rating | HBM ±2000 V, CDM ±750 V; meets automotive manufacturing ESD robustness requirements. |
Pinout & Package
TPS3824-50QDBVRQ1 uses a 5-pin SOT-23 (DBV) package with 2.90 mm × 1.60 mm body size, optimized for space-constrained automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-high push-pull output | Asserts high during valid VDD; releases after 200 ms delay when VDD > VIT−; drives MCU reset input directly. |
| 2: GND | Ground reference | Primary return path for internal circuitry and output stage; must be connected to low-impedance system ground plane. |
| 3: WDI | Watchdog timer input | Falling-edge triggered; resets watchdog timer; floating state generates internal pulses to prevent spurious reset. |
| 4: RESET | Active-low push-pull output | Complementary to Pin 1; asserts low during reset condition; supports legacy MCU designs requiring active-low reset. |
| 5: VDD | Power supply & monitored rail | Supplies device and serves as monitored input; operates from 1.1 V to 5.5 V; requires 0.1 µF ceramic bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C operation with HBM ±2000 V and CDM ±750 V ESD ratings-enables use in engine control, transmission, and ADAS ECUs. |
| Dual-polarity reset outputs | Simultaneous active-high (Pin 1) and active-low (Pin 4) push-pull outputs eliminate need for external inverters or level shifters in mixed-signal systems. |
| Fixed 4.55 V threshold with 50 mV hysteresis | Accurately supervises 5 V rails while rejecting noise-induced false triggers; no external resistors or calibration required. |
| 1.6 s watchdog timeout | Provides deterministic firmware hang detection window compatible with real-time OS task scheduling intervals in automotive software stacks. |
| 200 ms power-on reset delay | Ensures stable clock and memory initialization in microcontrollers before releasing reset-matches typical ARM Cortex-M boot timing. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
|
Use Scenario: Monitors 5 V supply to MCU and CAN transceivers during cold cranking and load dump events. IC Role / Device Role / Timing Role: Voltage supervisor with watchdog timer ensures MCU reset if firmware stalls during sensor fusion processing. Use Value: Prevents unsafe operation by forcing controlled reboot when VDD dips below 4.55 V or WDI fails to toggle within 1.6 s. |
Use Scenario: Supervises power to vision processor and radar SoC in forward collision warning systems. IC Role / Device Role / Timing Role: Dual-reset output interfaces with both processor (active-high) and peripheral ASIC (active-low) simultaneously. Use Value: Eliminates need for discrete logic or additional supervisors-reducing BOM count and board area in compact ADAS domain controllers. |
| Body Control Module (BCM) | Infotainment Head Unit |
|
Use Scenario: Provides fail-safe reset for LIN gateway MCU during battery voltage transients in door module networks. IC Role / Device Role / Timing Role: 200 ms delay aligns with LIN physical layer startup timing; WDI monitors gateway firmware liveness. Use Value: Guarantees deterministic recovery from brownout without requiring software-initiated reset-critical for ASIL-B compliance. |
Use Scenario: Supervises 5 V rail powering audio DSP and display controller in automotive infotainment systems. IC Role / Device Role / Timing Role: Active-high RESET directly controls DSP enable pin; active-low RESET drives display controller reset. Use Value: Enables synchronized power sequencing across heterogeneous subsystems using single supervisor IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3823-50QDBVRQ1 | Identical 4.55 V threshold and 200 ms delay, but active-low-only RESET output (no active-high pin). | Lacks dual-polarity reset; requires external inverter or MCU configuration change to support active-high reset logic. | Select when only active-low reset is needed and board layout cannot accommodate dual-output routing. |
| TPS3825-50QDBVRQ1 | Includes manual reset (MR) pin and dual reset outputs like TPS3824-50QDBVRQ1, but adds MR functionality. | Supports hardware-triggered reset via external switch or logic signal-useful for service mode or diagnostics. | Choose when field-serviceable reset capability is required, accepting slightly higher quiescent current (25 µA vs 15 µA). |
Compared with TPS3823-50QDBVRQ1 and TPS3825-50QDBVRQ1, the TPS3824-50QDBVRQ1 uniquely delivers dual-polarity reset without manual reset overhead-optimizing for space-constrained, software-managed automotive ECUs where MR is unnecessary.
Availability
TPS3824-50QDBVRQ1 is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, body control modules, and infotainment head units requiring stable component supply across automotive production lifecycles.
Supply support for TPS3824-50QDBVRQ1 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-grade ICs and functional safety solutions.
The TPS382x-Q1 product line delivers AEC-Q100-qualified voltage supervisors for automotive DSP, MCU, and microprocessor systems-designed specifically for power-on reset generation, supply rail monitoring, and watchdog-based fault recovery.
FAQ
What is the exact reset threshold voltage for TPS3824-50QDBVRQ1?
The TPS3824-50QDBVRQ1 has a nominal negative-going input threshold voltage (VIT−) of 4.55 V, with a guaranteed range of 4.44 V to 4.64 V across −40°C to 125°C. This value is factory-trimmed and fixed-no external components adjust it. The 50 in the part number explicitly denotes the 5 V supervision variant, and the threshold is referenced directly in Section 6.5 of the official datasheet.
Does TPS3824-50QDBVRQ1 include a manual reset (MR) pin?
No, the TPS3824-50QDBVRQ1 does not include a manual reset (MR) pin. Per the device-specific pinout in Figure 5-2 and Pin Functions table, Pins 1–5 are RESET, GND, WDI, RESET, and VDD-no MR terminal is present. This distinguishes it from TPS3825-xx-Q1 variants, which allocate Pin 4 to MR instead of the second RESET output.
What is the watchdog timeout period for TPS3824-50QDBVRQ1?
The watchdog timeout (ttout) for TPS3824-50QDBVRQ1 is 1.6 seconds, with a specified range of 0.9 s to 2.5 s over temperature. This value applies to all TPS3823/4/8-xx-Q1 devices and is confirmed in Section 6.7 Switching Characteristics. The timer resets on each falling edge at the WDI pin and triggers reset if no transition occurs within this interval.
How does the dual-reset output function in TPS3824-50QDBVRQ1?
The TPS3824-50QDBVRQ1 provides two independent reset outputs: Pin 1 (RESET) is active-high push-pull, and Pin 4 (RESET) is active-low push-pull. Both assert/deassert simultaneously based on VDD and WDI status. This allows direct interfacing with MCUs requiring either polarity without external logic-verified in the Functional Block Diagram (Section 7.2) and Device Functional Modes table (Section 7.4).
Is TPS3824-50QDBVRQ1 qualified for automotive use?
Yes, TPS3824-50QDBVRQ1 is AEC-Q100 qualified for automotive applications. It meets Grade 1 temperature requirements (−40°C to 125°C), HBM ESD classification Level 2 (±2000 V), and CDM ESD classification Level C4B (±750 V), as documented in Section 1 Features and Section 6.2 ESD Ratings of the datasheet.
TPS3824-50QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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 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
TPS3824-50QDBVRQ1 FAQ
1.How can I place an order for TPS3824-50QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3824-50QDBVRQ1 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 TPS3824-50QDBVRQ1 reliable?
The price and inventory of TPS3824-50QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3824-50QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3824-50QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3824-50QDBVRQ1 transactions.
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4.How is shipping managed for TPS3824-50QDBVRQ1?
TPS3824-50QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3824-50QDBVRQ1 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 TPS3824-50QDBVRQ1?
For technical support, including TPS3824-50QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3824-50QDBVRQ1 requirements.
6.How does Aetrix verify that TPS3824-50QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3824-50QDBVRQ1 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 TPS3824-50QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3824-50QDBVRQ1?
All TPS3824-50QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3824-50QDBVRQ1, 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 TPS3824-50QDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3824-50QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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