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Texas Instruments TPS3823-30QDBVRQ1
- Part No.:
- TPS3823-30QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3823-30QDBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,438
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Product details
Overview
TPS3823-30QDBVRQ1 from Texas Instruments is an automotive-grade voltage supervisor IC with integrated watchdog timer, fixed 2.63 V threshold (±20 mV), 200 ms reset delay, push-pull active-low RESET output, and manual reset (MR) input - used for reliable power-on initialization and fault recovery in microcontroller-based automotive control units.
For engineers reviewing the TPS3823-30QDBVRQ1 datasheet, TPS3823-30QDBVRQ1 pinout, TPS3823-30QDBVRQ1 application, or TPS3823-30QDBVRQ1 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification (−40°C to 125°C), 15 µA typical supply current, watchdog timeout of 1.6 s, MR-triggered reset propagation under 0.1 µs, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The TPS3823-30QDBVRQ1 implements a precision bandgap-based voltage reference with hysteresis (50 mV) to reject supply noise during threshold crossing. Its internal oscillator drives a 1.6 s watchdog timer that resets on rising/falling edges at WDI - independent of VDD status once powered above 1.1 V.
Reset assertion logic follows strict sequencing: RESET goes low when VDD falls below 2.55 V (min, −40°C to 125°C) or when MR is pulled low; release occurs only after VDD exceeds 2.69 V (max) and the 200 ms delay elapses. The push-pull output drives loads up to 1.2 mA with VOL ≤ 0.45 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.1 V to 5.5 V - enables operation across battery-supplied automotive rails including cold-crank (≥1.1 V startup) |
| Threshold Voltage (VIT−) | 2.63 V (typ), 2.55–2.69 V (min/max over −40°C to 125°C) - precisely matches 3.0 V system rails with margin for ripple and drift |
| Reset Delay Time (td) | 200 ms (min/typ/max) - ensures full microcontroller core and peripheral stabilization before release |
| Watchdog Timeout (ttout) | 1.6 s (typ), 0.9–2.5 s - provides robust supervision window for firmware execution cycles without false triggers |
| Supply Current (IDD) | 15 µA (typ), 25 µA (max) - minimizes quiescent load in always-on vehicle modules |
| Output Type | Push-pull active-low RESET - eliminates external pull-up resistor, supports direct MCU reset pin interface |
| ESD Rating | HBM ±2000 V, CDM ±750 V - meets AEC-Q100 stress requirements for automotive assembly environments |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant, thermal resistance RθJA = 209.1°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 5) | Power supply input and monitored rail | Supplies internal circuitry and serves as the voltage source for threshold comparison; requires local 0.1 µF ceramic decoupling |
| GND (Pin 2) | Ground reference | Common return path for all internal blocks; must be low-impedance connection to system ground plane |
| RESET (Pin 1) | Active-low reset output | Push-pull driver asserts low during fault conditions; sinks up to 1.2 mA with VOL ≤ 0.45 V at 2.66 V VDD |
| MR (Pin 3) | Manual reset input | Asynchronous active-low trigger; forces RESET low regardless of VDD level or watchdog state; internal 52 kΩ pullup |
| WDI (Pin 4) | Watchdog timer input | Edge-sensitive input (rising/falling); timeout occurs if no transition within 1.6 s; high-impedance detection prevents spurious resets |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C ambient operation - suitable for engine bay and ADAS ECU deployments |
| Fixed 2.63 V threshold with 50 mV hysteresis | Rejects transient supply noise up to 50 mV without chatter; eliminates need for external resistor divider or capacitor tuning |
| 200 ms power-on reset delay | Guarantees stable clock, PLL lock, and memory initialization in DSP/microcontroller systems before release |
| 1.6 s watchdog timeout with edge-triggered WDI | Supports deterministic firmware supervision without requiring precise timing margins or clock synchronization |
| 15 µA typical supply current | Enables integration into low-power wake-up circuits and battery-backed modules without compromising runtime |
| MR input with internal 52 kΩ pullup | Reduces BOM count; allows direct connection to open-drain GPIO or switch without external biasing components |
Applications
| Engine Control Unit (ECU) Power Sequencing | ADAS Camera Module Supervision |
|---|---|
Use Scenario: Monitors 3.0 V domain powering MCU, CAN transceiver, and analog front-end during ignition and stop-start cycles. IC Role / Device Role / Timing Role: Voltage supervisor with watchdog - asserts RESET until VDD stabilizes above 2.55 V, then enforces 200 ms hold time and monitors firmware liveness via WDI. Use Value: Prevents brownout-induced code corruption and ensures deterministic boot sequence even under 8 V cold-crank conditions. |
Use Scenario: Secures image sensor and ISP power-up in automotive surround-view cameras exposed to thermal cycling and EMI. IC Role / Device Role / Timing Role: Dual-role supervisor - initiates power-on reset and continuously validates firmware execution through periodic WDI toggling. Use Value: Eliminates silent hangs during image pipeline processing; enables automatic recovery without host intervention. |
| Electric Power Steering (EPS) Motor Controller | Body Control Module (BCM) Wake-Up Monitoring |
Use Scenario: Supervises 3.3 V logic rail feeding safety-critical motor gate drivers and position feedback ADCs. IC Role / Device Role / Timing Role: Fault-detection node - triggers immediate RESET on undervoltage or missed WDI pulse, halting torque command execution. Use Value: Meets ASIL-B functional safety requirements by providing hardware-enforced fail-safe response within <1 µs of fault detection. |
Use Scenario: Manages low-power wake-up sequence for BCM microcontroller during vehicle sleep mode transitions. IC Role / Device Role / Timing Role: Low-quiescent supervisor - remains active at 15 µA while monitoring VDD and responding to MR pulses from door handle sensors. Use Value: Reduces parasitic drain below 20 µA, extending battery life in parked vehicle scenarios beyond 30 days. |
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 | Higher threshold: 2.93 V (typ), 2.84–3.00 V range - optimized for 3.3 V rails instead of 3.0 V | Used where nominal supply is 3.3 V with tighter regulation; not interchangeable without verifying VDD tolerance margin | Select when supervising 3.3 V domains with ≥5% headroom; identical pinout, timing, and features otherwise |
| TPS3820-30QDBVRQ1 | Shorter reset delay: 25 ms (vs. 200 ms); no watchdog timer - simplified supervision without firmware liveness check | Applicable in non-safety-critical systems where fast reset release is prioritized over fault detection coverage | Choose for cost-sensitive or latency-critical applications lacking watchdog requirements; same threshold and package |
Compared with TPS3823-30QDBVRQ1, the TPS3823-33QDBVRQ1 offers higher threshold accuracy for 3.3 V systems but lacks compatibility with 3.0 V rails, while the TPS3820-30QDBVRQ1 trades watchdog capability and longer delay for faster reset release - making it suitable only where firmware-level fault detection is handled externally.
Availability
TPS3823-30QDBVRQ1 is available at Aetrix Electronics and suitable for automotive ECUs, ADAS camera modules, electric power steering controllers, and body control modules requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for TPS3823-30QDBVRQ1 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, industrial, and power management solutions.
The TPS382x-Q1 product line delivers AEC-Q100-qualified voltage supervisors designed specifically for automotive electronic control units requiring guaranteed operation from −40°C to 125°C, low quiescent current, and integrated watchdog functionality.
FAQ
What is the exact threshold voltage tolerance of the TPS3823-30QDBVRQ1 over temperature?
The TPS3823-30QDBVRQ1 has a negative-going input threshold voltage (VIT−) of 2.63 V (typical) with min/max values of 2.55 V and 2.69 V across −40°C to 125°C. This 140 mV total span includes initial accuracy, temperature drift, and process variation - verified per AEC-Q100 test conditions and documented in Section 7.5 of the SGLS143C datasheet.
Does the TPS3823-30QDBVRQ1 require external components for basic operation?
No, the TPS3823-30QDBVRQ1 operates autonomously with no external resistors or capacitors required for threshold setting or timing. A 0.1 µF ceramic capacitor on VDD is recommended for noisy supplies but not mandatory for functionality. The internal voltage divider sets the 2.63 V threshold, and the 200 ms delay and 1.6 s watchdog timeout are factory-trimmed.
Can the watchdog timer in the TPS3823-30QDBVRQ1 be disabled?
Yes - the watchdog timer is automatically disabled when the WDI pin is left floating (high-impedance). The device detects this state and generates its own internal WDI pulse to prevent unintended reset assertion. For guaranteed disable, connect WDI to GND via a 1 kΩ resistor to override high-Z detection.
What is the maximum sink current capability of the RESET output on the TPS3823-30QDBVRQ1?
The RESET output of the TPS3823-30QDBVRQ1 is a push-pull driver rated for 1.2 mA sink current with VOL ≤ 0.45 V at VDD = 2.66 V and TA = −40°C to 125°C. This supports direct interfacing with standard CMOS and TTL reset inputs without external buffering or level-shifting.
Is the TPS3823-30QDBVRQ1 pin-compatible with other devices in the TPS382x-Q1 family?
Yes - all TPS382x-xx-Q1 devices in SOT-23-5 (DBV) package share identical pinout: Pin 1 = RESET, Pin 2 = GND, Pin 3 = MR, Pin 4 = WDI, Pin 5 = VDD. Threshold voltage, delay time, and watchdog presence vary by suffix, but mechanical and electrical interface compatibility is maintained across the family.
TPS3823-30QDBVRQ1 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:
- 2.63V
- 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
TPS3823-30QDBVRQ1 FAQ
1.How can I place an order for TPS3823-30QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3823-30QDBVRQ1 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 TPS3823-30QDBVRQ1 reliable?
The price and inventory of TPS3823-30QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3823-30QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3823-30QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3823-30QDBVRQ1 transactions.
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4.How is shipping managed for TPS3823-30QDBVRQ1?
TPS3823-30QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3823-30QDBVRQ1 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 TPS3823-30QDBVRQ1?
For technical support, including TPS3823-30QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3823-30QDBVRQ1 requirements.
6.How does Aetrix verify that TPS3823-30QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3823-30QDBVRQ1 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 TPS3823-30QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3823-30QDBVRQ1?
All TPS3823-30QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3823-30QDBVRQ1, 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 TPS3823-30QDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3823-30QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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