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Texas Instruments TPS3828-33QDBVRQ1
- Part No.:
- TPS3828-33QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3828-33QDBVRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,479
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Product details
Overview
TPS3828-33QDBVRQ1 from Texas Instruments is an automotive-grade voltage supervisor IC with integrated watchdog timer, open-drain active-low reset output, 3.3 V supply threshold (VIT− = 2.84–3.00 V), 200 ms reset delay, and manual reset input - used for power-on initialization and fault recovery in automotive microcontrollers and DSPs.
For engineers reviewing the TPS3828-33QDBVRQ1 datasheet, TPS3828-33QDBVRQ1 pinout, TPS3828-33QDBVRQ1 application, or TPS3828-33QDBVRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (−40°C to 125°C), 15 µA typical supply current, open-drain RESET output compatibility with wired-OR configurations, and watchdog timeout of 1.6 s.
Technical Context
The TPS3828-33QDBVRQ1 implements a fixed-threshold supervision architecture with internal voltage divider setting VIT− at 3.3 V nominal, hysteresis of 50 mV, and power-on reset assertion at VDD > 1.1 V. Its watchdog timer triggers on missing WDI transitions within 0.9–2.5 s and resets on falling edges.
It features a manual reset input (MR) that forces active-low RESET regardless of VDD level or watchdog state, and uses open-drain output stage enabling flexible pull-up configuration and multi-source reset bus sharing - distinct from push-pull variants like TPS3823-33QDBVRQ1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply threshold VIT− | 2.84–3.00 V at −40°C to 125°C; ensures reliable 3.3 V rail monitoring across full automotive temperature range |
| Reset delay td | 120–300 ms; provides sufficient time for downstream processor stabilization after power-up or brownout recovery |
| Watchdog timeout ttout | 0.9–2.5 s; detects firmware lockup in safety-critical automotive control units without requiring external timing components |
| Supply current IDD | 15–25 µA typical; enables low-power operation in always-on vehicle subsystems such as body control modules |
| Output type | Open-drain RESET; supports wired-OR reset buses, level translation, and shared reset signaling with multiple supervisors |
| ESD rating | HBM ±2000 V, CDM ±750 V; meets AEC-Q100 stress test requirements for robustness in automotive manufacturing and field environments |
| Operating temperature | −40°C to 125°C ambient; qualified per AEC-Q100 Grade 1 for under-hood and infotainment applications |
Pinout & Package
TPS3828-33QDBVRQ1 is housed in a 5-pin SOT-23 (DBV) package with 2.90 mm × 1.60 mm body size and standard lead pitch. Pin functions are validated per TI SGLS143E datasheet Figures 5-1 and 5-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low open-drain output | Drives low during reset assertion; requires external pull-up for logic-high inactive state; supports multi-device reset bus |
| 2: GND | Ground reference | Primary return path for internal circuitry and output sink current; must be connected to system ground plane |
| 3: MR | Manual reset input | Active-low signal; forces RESET low when asserted, independent of VDD or watchdog status; internally pulled up to ~90 kΩ |
| 4: WDI | Watchdog timer input | Edge-sensitive input; falling edge clears watchdog timer; floating state generates internal pulses to prevent spurious reset |
| 5: VDD | Supply and monitored voltage | Powers device and serves as monitored rail; operates from 1.1 V to 5.5 V; threshold set to 3.3 V nominal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C operation, HBM ±2000 V, CDM ±750 V - suitable for engine control, ADAS, and gateway ECUs |
| Open-drain RESET output | Enables direct connection to shared reset lines with other open-drain supervisors or processors without level-shifting or contention |
| 200 ms fixed reset delay | Guarantees minimum reset pulse width for proper initialization of automotive MCUs such as TI C2000 or NXP S32K series |
| 1.6 s watchdog timeout | Provides deterministic fault detection window for firmware hang scenarios in ASIL-B compliant systems |
| Manual reset (MR) with internal pull-up | Allows external hardware reset initiation (e.g., button, diagnostic tool) without external resistor; simplifies BOM and layout |
Applications
| Automotive Engine Control Unit (ECU) | ADAS Camera Module |
|---|---|
|
Use Scenario: Monitors 3.3 V power rail supplying image signal processor and SerDes interface in rear-view camera system. IC Role / Device Role / Timing Role: Voltage supervisor with watchdog; asserts open-drain RESET to halt ISP and trigger safe boot upon rail collapse or firmware stall. Use Value: Prevents corrupted image streaming by enforcing clean restart before sensor data reaches display pipeline. |
Use Scenario: Supervises 3.3 V domain powering radar preprocessor and CAN FD transceiver in forward collision warning module. IC Role / Device Role / Timing Role: Dual-function supervisor: monitors supply integrity and detects software deadlock via WDI input tied to MCU GPIO. Use Value: Ensures fail-safe shutdown and recovery within ISO 26262 ASIL-B timing constraints using 1.6 s watchdog timeout. |
| Body Control Module (BCM) | Infotainment Head Unit |
|
Use Scenario: Provides power-on reset and brownout protection for 3.3 V microcontroller managing door locks, lighting, and LIN gateways. IC Role / Device Role / Timing Role: Primary reset generator with MR input for service-mode reinitialization; open-drain output interfaces directly with MCU reset pin. Use Value: Eliminates need for external pull-up resistor and supports diagnostics via MR pin without PCB redesign. |
Use Scenario: Supervises 3.3 V supply to application processor and audio codec in head unit with always-on wake-up capability. IC Role / Device Role / Timing Role: Low-quiescent-current (15 µA) supervisor enabling extended battery runtime in accessory mode while maintaining watchdog vigilance. Use Value: Reduces parasitic drain during vehicle sleep state while preserving fault detection readiness for fast wake-up response. |
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 | Push-pull active-low RESET output; identical VIT−, td, ttout, and pinout | Requires dedicated reset line; not compatible with wired-OR bus architectures | Select when system uses single-supervisor reset topology and no shared reset bus is needed |
| TPS3828-33QDBVTQ1 | Same electrical specs and pinout; packaged in 5-pin SOT-23-THIN (DCK) with 1.60 mm × 1.20 mm footprint | Smaller PCB area; higher thermal resistance (RθJA = 225°C/W vs. 185°C/W) | Select when board space is constrained and thermal derating is acceptable for ambient < 105°C |
Compared with TPS3823-33QDBVRQ1 and TPS3828-33QDBVTQ1, the TPS3828-33QDBVRQ1 uniquely combines open-drain output with standard SOT-23 thermal performance - making it optimal for modular automotive designs requiring reset bus sharing and production-proven reliability.
Availability
TPS3828-33QDBVRQ1 is available at Aetrix Electronics and suitable for automotive engine control, ADAS camera modules, body control modules, and infotainment head units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for TPS3828-33QDBVRQ1 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 specializing in analog and embedded processing technologies, with leadership in automotive, industrial, and power management ICs.
The TPS382x-Q1 product line delivers AEC-Q100-qualified voltage supervisors for functional safety-critical automotive systems - designed to ensure deterministic power-on sequencing, brownout recovery, and firmware watchdog supervision in ECUs and ADAS domains.
FAQ
What is the exact supply voltage threshold for TPS3828-33QDBVRQ1?
The TPS3828-33QDBVRQ1 has a negative-going input threshold voltage (VIT−) of 2.84 V (min), 2.93 V (typ), and 3.00 V (max) over −40°C to 125°C - specifically calibrated for 3.3 V rail supervision with 50 mV hysteresis to reject noise-induced false resets.
Does TPS3828-33QDBVRQ1 require external components for basic operation?
No. The TPS3828-33QDBVRQ1 requires no external resistors or capacitors for core supervision function. A 0.1 µF ceramic capacitor on VDD is recommended for noisy supplies, but the internal voltage divider, timer, and watchdog logic are fully self-contained.
How does the watchdog timer in TPS3828-33QDBVRQ1 behave when WDI is left unconnected?
When WDI is floating, the TPS3828-33QDBVRQ1 generates internal pulses to prevent watchdog timeout. This default behavior avoids unintended reset assertion - but for deterministic operation, WDI should be driven by MCU GPIO or pulled high/low with a 1 kΩ resistor if unused.
Can TPS3828-33QDBVRQ1 drive a microcontroller reset pin directly?
Yes - the open-drain RESET output of TPS3828-33QDBVRQ1 can directly interface with standard CMOS or TTL reset inputs. An external pull-up resistor (typically 4.7–10 kΩ to VDD) is required to establish the inactive high state; sink current capability supports ≥3 mA at 0.4 V.
Is TPS3828-33QDBVRQ1 pin-compatible with other TPS382x-Q1 variants?
Yes - TPS3828-33QDBVRQ1 shares identical 5-pin SOT-23 (DBV) pinout with TPS3820/3/4/5-33QDBVRQ1. Pin-for-pin compatibility enables drop-in substitution where open-drain output is acceptable, though output drive architecture differs from push-pull variants.
TPS3828-33QDBVRQ1 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:
- Open Drain or Open Collector
- 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
TPS3828-33QDBVRQ1 FAQ
1.How can I place an order for TPS3828-33QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3828-33QDBVRQ1 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 TPS3828-33QDBVRQ1 reliable?
The price and inventory of TPS3828-33QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3828-33QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3828-33QDBVRQ1?
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TPS3828-33QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3828-33QDBVRQ1 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 TPS3828-33QDBVRQ1?
For technical support, including TPS3828-33QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3828-33QDBVRQ1 requirements.
6.How does Aetrix verify that TPS3828-33QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3828-33QDBVRQ1 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 TPS3828-33QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3828-33QDBVRQ1?
All TPS3828-33QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3828-33QDBVRQ1, 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 TPS3828-33QDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3828-33QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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