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Texas Instruments TPS3824-33QDBVRQ1
- Part No.:
- TPS3824-33QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3824-33QDBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS3824-33QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive voltage supervisor IC with active-high reset output, 3.3 V fixed threshold, 200 ms power-on reset delay, watchdog timer, and 5-pin SOT-23 package. It monitors microcontroller supply rails in engine control units and ADAS domain controllers to ensure reliable power-up sequencing and fault recovery.
For engineers reviewing the TPS3824-33QDBVRQ1 datasheet, TPS3824-33QDBVRQ1 pinout, TPS3824-33QDBVRQ1 application, or TPS3824-33QDBVRQ1 equivalent, key selection criteria include its 2.84–3.00 V negative-going threshold (–40°C to 125°C), 15 µA typical supply current, push-pull active-high RESET output, manual reset input omission, and watchdog timeout of 1.6 s.
Technical Context
The TPS3824-33QDBVRQ1 implements a fixed-threshold supervision architecture with internal voltage divider setting VIT− = 2.93 V (nominal) and 50 mV hysteresis. Its watchdog timer requires periodic falling-edge transitions on WDI to prevent reset assertion, with timeout configurable only via part number (1.6 s for TPS3824-x-Q1).
Unlike TPS3820/3/5/8 variants, this device omits the MR pin and provides dual reset outputs: active-low RESET and active-high RESET - both push-pull. The internal POR circuit asserts reset below 1.1 V VDD and initiates the 200 ms delay after VDD exceeds VIT− + VHYS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 1.1 V to 5.5 V - supports operation during brown-out and startup before main regulator stabilizes. |
| VIT− threshold (–40°C to 125°C) | 2.84 V to 3.00 V - ensures reliable 3.3 V rail monitoring across full automotive temperature range. |
| Reset delay time (td) | 120 ms to 300 ms - guarantees sufficient hold time for DSP/microcontroller initialization after power rise. |
| Watchdog timeout (ttout) | 0.9 s to 2.5 s - detects firmware lockup in safety-critical ECUs without requiring external timing components. |
| Supply current (IDD) | 15 µA typical - enables use in always-on vehicle subsystems with strict quiescent power budgets. |
| Output drive strength | IOH = –100 µA at 0.8×VDD; IOL = 1 mA at 0.4 V - directly interfaces with CMOS inputs without external pull-ups. |
| ESD rating (HBM) | ±2000 V - meets MIL-STD-883 requirements for robustness in automotive manufacturing and field environments. |
Pinout & Package
TPS3824-33QDBVRQ1 uses a 5-pin SOT-23 (DBV) package with 2.90 mm × 1.60 mm body size and standard lead pitch. Pin 1 is RESET (active-low), Pin 2 is GND, Pin 3 is RESET (active-high), Pin 4 is WDI, and Pin 5 is VDD.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low reset output | Push-pull driver compatible with legacy microcontroller reset inputs expecting low-active assertion. |
| 2: GND | Ground reference | Common return path for internal comparators, timer, and output drivers; must be low-impedance. |
| 3: RESET | Active-high reset output | Push-pull driver for systems requiring high-active reset signaling (e.g., certain DSP boot sequences). |
| 4: WDI | Watchdog timer input | Falling-edge-triggered input; floating state generates internal pulses to prevent spurious resets. |
| 5: VDD | Supply and monitored rail | Powers device and serves as primary supervision target; operates down to 1.1 V for POR functionality. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C ambient operation - suitable for under-hood and transmission-control applications. |
| Dual active reset outputs | Simultaneous push-pull RESET (low-active) and RESET (high-active) - eliminates need for external inverters. |
| Fixed 3.3 V supervision threshold | 2.93 V nominal with ±70 mV total variation over temperature - matches 3.3 V LDO tolerance without calibration. |
| Integrated 200 ms reset delay | No external RC network required - reduces BOM count and PCB area in space-constrained automotive modules. |
| Watchdog timer with 1.6 s timeout | Self-contained fault detection - prevents system hang without software intervention or external oscillator. |
| 15 µA quiescent current | Enables integration into always-on domains (e.g., CAN gateway wake-up logic) without compromising battery life. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Monitors 3.3 V supply to MCU and sensor interface ASIC during cold cranking and load dump events. IC Role / Device Role / Timing Role: Voltage supervisor providing POR, brown-out detection, and watchdog supervision for real-time safety firmware. Use Value: Prevents MCU execution from invalid memory states by enforcing 200 ms minimum reset pulse width and detecting firmware stalls via WDI. |
Use Scenario: Supervises power rails of radar processor and camera SoC in forward collision warning module. IC Role / Device Role / Timing Role: Dual-output reset generator ensuring synchronized boot of heterogeneous processors and FPGA configuration logic. Use Value: Active-high RESET drives FPGA PROG_B while active-low RESET controls MCU reset, eliminating discrete level-shifting components. |
| Body Control Module (BCM) | Infotainment Head Unit |
Use Scenario: Provides fail-safe reset for LIN gateway MCU during battery voltage transients caused by power window motor activation. IC Role / Device Role / Timing Role: Automotive-grade supervisor with HBM ±2000 V ESD protection for harsh electrical environments. Use Value: Withstands repeated 12 V load-dump spikes up to 6 V without latch-up, maintaining system availability. |
Use Scenario: Ensures clean boot of application processor and audio codec after ignition-on sequence in digital cockpit. IC Role / Device Role / Timing Role: Watchdog-enabled supervisor verifying firmware responsiveness during display initialization. Use Value: 1.6 s watchdog timeout aligns with bootloader execution window, preventing silent hangs before OS load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3823-33QDBVRQ1 | Active-low-only RESET output; identical 3.3 V threshold, 200 ms delay, and 1.6 s watchdog. | Requires external inverter for high-active reset signaling; lacks dual-output flexibility. | Select when only one reset polarity is needed and board space allows for discrete inversion. |
| TPS3825-33QDBVRQ1 | Includes manual reset (MR) pin and dual active-high/active-low outputs; same threshold and timing. | Supports operator-initiated reset and failsafe override; adds pin count and routing complexity. | Choose when system-level diagnostics require hardware-initiated reset independent of power rail status. |
Compared with TPS3823-33QDBVRQ1 and TPS3825-33QDBVRQ1, the TPS3824-33QDBVRQ1 uniquely delivers dual-polarity reset outputs without manual reset capability - optimizing for compact, software-managed safety systems where MR is redundant.
Availability
TPS3824-33QDBVRQ1 is available at Aetrix Electronics and suitable for automotive engine control, ADAS domain controllers, body electronics, and infotainment systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS3824-33QDBVRQ1 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 consumer markets, with leadership in power management and signal chain technologies.
The TPS382x-Q1 product line delivers AEC-Q100-qualified voltage supervisors for automotive electronic control units, emphasizing reliability, low quiescent current, and integrated watchdog functionality for functional safety compliance.
FAQ
What is the exact reset threshold voltage range for TPS3824-33QDBVRQ1 over temperature?
The TPS3824-33QDBVRQ1 has a negative-going input threshold voltage (VIT−) of 2.84 V minimum to 3.00 V maximum across the full –40°C to 125°C operating range, with 2.93 V nominal at 25°C. This 56 mV total variation ensures robust 3.3 V rail supervision without external trimming or calibration.
Does TPS3824-33QDBVRQ1 include a manual reset (MR) input?
No, the TPS3824-33QDBVRQ1 does not include a manual reset (MR) input. Unlike TPS3820/3/5/8-xx-Q1 variants, this device omits the MR pin to reduce pin count and simplify layout in systems where reset is managed exclusively through power sequencing and watchdog logic.
What is the watchdog timeout behavior of TPS3824-33QDBVRQ1?
The TPS3824-33QDBVRQ1 features a watchdog timer with a nominal timeout of 1.6 s (range 0.9 s to 2.5 s). It triggers reset if no falling edge occurs on the WDI pin within that interval. The timer clears on each valid WDI transition and reinitializes upon reset assertion.
How does the dual-reset output configuration work on TPS3824-33QDBVRQ1?
The TPS3824-33QDBVRQ1 provides two independent push-pull reset outputs: Pin 1 (RESET) is active-low, and Pin 3 (RESET) is active-high. Both assert/deassert simultaneously based on VDD monitoring and watchdog status, enabling direct interface with mixed-polarity reset requirements in complex SoC designs.
Is TPS3824-33QDBVRQ1 qualified for automotive applications?
Yes, the TPS3824-33QDBVRQ1 is AEC-Q100 qualified for automotive applications with Device Temperature Grade 1 (–40°C to 125°C), HBM ESD classification Level 2 (±2000 V), and CDM Level C4B (±750 V), making it suitable for engine bay, chassis, and safety-critical electronic control units.
TPS3824-33QDBVRQ1 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:
- 2.93V
- 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
TPS3824-33QDBVRQ1 FAQ
1.How can I place an order for TPS3824-33QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3824-33QDBVRQ1 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 TPS3824-33QDBVRQ1 reliable?
The price and inventory of TPS3824-33QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3824-33QDBVRQ1 is usually 5 days.
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TPS3824-33QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3824-33QDBVRQ1 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 TPS3824-33QDBVRQ1?
For technical support, including TPS3824-33QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3824-33QDBVRQ1 requirements.
6.How does Aetrix verify that TPS3824-33QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3824-33QDBVRQ1 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 TPS3824-33QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3824-33QDBVRQ1?
All TPS3824-33QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3824-33QDBVRQ1, 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 TPS3824-33QDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3824-33QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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