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Texas Instruments TPS389C0300CRTERQ1
- Part No.:
- TPS389C0300CRTERQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
TPS389C0300CRTERQ1.pdf
- Description:
- AUTOMOTIVE, 3-CHANNEL, OVERVOLTA
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS389C0300CRTERQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) multichannel I²C-programmable voltage supervisor with three remote-sense monitor channels, ±5 mV high-threshold accuracy, Q&A watchdog, and Error Signal Monitor (ESM). It operates from 2.6 V to 5.5 V, supports window monitoring with HF/LF fault detection, and delivers ASIL D hardware capability for automotive safety-critical power sequencing in ADAS SoCs.
For engineers reviewing the TPS389C0300CRTERQ1 datasheet, TPS389C0300CRTERQ1 pinout, TPS389C0300CRTERQ1 application, or TPS389C0300CRTERQ1 equivalent, this device offers programmable UV/OV thresholds in 5 mV steps (0.2 V–1.475 V), I²C-configurable watchdog timing (1 ms–864 ms), built-in ADC telemetry, CRC/PEC error checking, and active-low open-drain NIRQ/NRST/WDO outputs - all in a 3 mm × 3 mm WQFN-16 package.
Technical Context
The TPS389C0300CRTERQ1 implements dual-mode voltage monitoring per channel: high-frequency (HF) comparator-based detection with configurable 0.1 µs–102.4 µs glitch filtering, and low-frequency (LF) ADC-based drift monitoring with 125 ksps sampling and ±12 mV LF accuracy. It integrates internal precision resistor dividers eliminating external components for threshold setting.
Its functional safety architecture includes systematic and hardware ASIL D compliance, ESM with programmable 1 ms–864 ms delay, cyclic redundancy checking (CRC), packet error checking (PEC), and independent watchdog enable (WDE) with up to 7 violation count before WDO assertion - enabling robust software health verification in autonomous driving platforms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.6 V to 5.5 V - powers directly from automotive 3.3 V or 5 V rails without LDO |
| Monitor Channels | 3 independent voltage inputs with remote sense (RS_2, RS_3, RS_4) - enables accurate point-of-load monitoring |
| Threshold Accuracy | ±5 mV over –40°C to +125°C - eliminates need for external calibration or trimming resistors |
| Watchdog Timing | Programmable OPEN/CLOSE windows from 1 ms to 864 ms via I²C - supports diverse SoC boot and runtime timing profiles |
| ADC Resolution & Range | 5 mV LSB (1× mode, 0.2 V–1.475 V); 20 mV LSB (4× mode, >1.475 V) - enables precise telemetry for supply margin analysis |
| I²C Interface Speed | Up to 1 MHz (Fast Mode Plus) - allows rapid configuration and real-time telemetry reads without bus contention |
| Package | 16-pin WQFN (RTE), 3 mm × 3 mm - compact footprint compatible with high-density ADAS PCB layouts |
Pinout & Package
TPS389C0300CRTERQ1 is housed in a thermally enhanced 16-pin WQFN package (RTE) with exposed thermal pad, measuring 3 mm × 3 mm. The package supports automated optical inspection (AOI) and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MON2, MON3, MON4 | Input voltage sense | Three independent analog inputs for monitoring DC/DC outputs or SoC rails |
| RS_2, RS_3, RS_4 | Remote sense reference | Compensates for PCB trace IR drop to ensure accurate point-of-load voltage supervision |
| NIRQ, NRST, WDO | Active-low open-drain outputs | Drive external pull-ups to VDD or host rail; support wired-OR interrupt aggregation and reset coordination |
| WDE | Digital input | Hardware-enable/disable of Q&A watchdog - provides fail-safe override independent of I²C |
| ESM | Digital input | Monitors external error signals (e.g., MCU lockup flags) with programmable 1 ms–864 ms debounce |
| SCL, SDA, ADDR | I²C interface | Supports up to 8 devices on same bus via ADDR pin; enables dynamic threshold, delay, and filter reconfiguration |
| VDD, GND | Power supply | Operates across full automotive range (2.6 V–5.5 V); no external bypass capacitor required under clean conditions |
Key Features
| Feature | Design Value |
|---|---|
| Integrated resistor divider network | Eliminates external threshold-setting resistors - reduces BOM count, layout area, and accuracy drift from resistor tolerances |
| HF/LF dual-fault detection per channel | Simultaneous fast comparator-based (sub-µs response) and slow ADC-based (drift tracking) monitoring - enables both transient immunity and long-term supply stability verification |
| Q&A watchdog with startup delay | Configurable 2 ms–3.46 s boot initialization window - prevents false timeout during SoC firmware load and PLL lock |
| Error Signal Monitor (ESM) | Independent input with I²C-programmable 1 ms–864 ms delay - allows integration with external safety monitors or MCU fault outputs without software dependency |
| CRC and PEC validation | Ensures integrity of I²C register writes and telemetry reads - critical for ASIL D system-level fault containment |
Applications
| ADAS Power Sequencing | Autonomous SoC Health Monitoring |
|---|---|
Use Scenario: Supervising multiple DC/DC converters powering camera, radar, and fusion processors in Level 3+ ADAS domain controllers. IC Role / Device Role / Timing Role: Multichannel window monitor asserting NRST on any rail deviation outside ±3% tolerance, with NIRQ signaling non-critical faults to host MCU. Use Value: Ensures deterministic power-up sequence and continuous supply integrity - preventing silent corruption in vision processing pipelines. |
Use Scenario: Monitoring core, I/O, and memory rails of an automotive SoC while concurrently validating software execution via Q&A watchdog. IC Role / Device Role / Timing Role: Combines voltage telemetry (ADC readouts) with programmable watchdog timing to correlate hardware supply stability with software liveness. Use Value: Enables end-to-end fault coverage for ISO 26262 ASIL D decomposition - detecting both hardware supply faults and software hang conditions. |
| Sensor Fusion Module Reset Control | Functional Safety Gateway Supervision |
Use Scenario: Managing reset coordination across heterogeneous sensors (LiDAR, IMU, GPS) sharing a common power domain in a centralized sensor hub. IC Role / Device Role / Timing Role: Uses three MON channels to supervise shared 1.8 V, 3.3 V, and 5 V supplies; asserts synchronized NRST only when all rails are stable. Use Value: Prevents partial initialization and race conditions between sensors - ensuring atomic system readiness for time-critical fusion algorithms. |
Use Scenario: Acting as a dedicated safety monitor in a vehicle gateway ECU, supervising main MCU supply and verifying communication integrity via ESM input tied to CAN FD error flag. IC Role / Device Role / Timing Role: Configures ESM with 100 µs debounce to detect CAN controller errors, then triggers NIRQ to initiate safe state transition. Use Value: Provides hardware-enforced separation between communication stack faults and power faults - satisfying ASIL D partitioning requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS389C03A26RTERQ1 | Factory-configured thresholds: VMON2 = 3.0 V/3.6 V (UV/OV), VMON3 = 1.7 V/1.9 V, VMON4 = 1.1 V/1.31 V; watchdog enabled at POR | Targeted for lower-voltage SoC rails (e.g., 1.8 V core, 1.2 V I/O); fixed HF/LF scaling | Select when pre-defined thresholds match target supply rails and watchdog must be active immediately after POR. |
| TPS389C03P6XRTERQ1 | Factory-configured thresholds: VMON2 = 4.56 V/5.44 V, VMON3 = 3.02 V/3.6 V, VMON4 = 1.1 V/1.31 V; watchdog enabled at POR | Optimized for mixed-rail systems with 5 V analog, 3.3 V digital, and 1.2 V logic domains | Select when higher OV thresholds (5.44 V) are required for 5 V DC/DC outputs and watchdog activation at startup is mandatory. |
Compared with TPS389C0300CRTERQ1, both alternatives offer identical ASIL D hardware capability and pinout but differ in factory-set voltage thresholds and default watchdog enable state - making them drop-in replacements only when their specific UV/OV levels align with system requirements and no runtime I²C reconfiguration of thresholds is needed.
Availability
TPS389C0300CRTERQ1 is available at Aetrix Electronics and suitable for advanced driver assistance systems (ADAS), autonomous SoC power management, and functional safety gateway designs requiring stable component supply, automotive-grade reliability, and ASIL D-compliant supervision.
Supply support for TPS389C0300CRTERQ1 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 leader specializing in analog, embedded processing, and automotive ICs, with decades of experience delivering AEC-Q100-qualified products for safety-critical vehicle systems.
The TPS389C03-Q1 product line is designed specifically for next-generation automotive ADAS and autonomous platforms, integrating multichannel voltage supervision, Q&A watchdog, and functional safety features into a single compact package to simplify power integrity validation.
FAQ
What is the operating temperature range for the TPS389C0300CRTERQ1?
The TPS389C0300CRTERQ1 is qualified to AEC-Q100 Grade 1 specifications, supporting continuous operation from –40°C to +125°C ambient temperature. This range covers under-hood and cockpit environments in automotive applications, and its thermal shutdown activates at 155°C with 25°C hysteresis to protect against sustained overheating. The device maintains ±5 mV threshold accuracy across this full range.
Does the TPS389C0300CRTERQ1 require external resistors to set voltage thresholds?
No, the TPS389C0300CRTERQ1 integrates precision trimmed resistor dividers internally for all overvoltage and undervoltage threshold settings. This eliminates external resistor networks, reduces BOM cost and PCB area, and ensures ±5 mV accuracy without tolerance stacking. Thresholds are configured either via factory programming (as in TPS389C0300CRTERQ1's 4.56 V/5.44 V, 3.02 V/3.6 V, and 0.2 V/1.475 V defaults) or dynamically through I²C registers.
How does the Q&A watchdog function in the TPS389C0300CRTERQ1?
The TPS389C0300CRTERQ1 implements a question-and-answer (Q&A) watchdog where the host SoC must respond to periodic challenges via I²C within programmable OPEN/CLOSE timing windows (1 ms–864 ms). It supports configurable startup delay (2 ms–3.46 s) to accommodate boot sequences, and up to 7 consecutive missed responses before asserting WDO. Watchdog enable/disable is controlled independently by the WDE pin, providing hardware-level override capability.
Can the TPS389C0300CRTERQ1 monitor voltages below 0.2 V or above 5.5 V?
No - the TPS389C0300CRTERQ1 specifies a valid MON pin input voltage range of 0.2 V to 5.5 V per electrical characteristics. Voltages below 0.2 V fall outside guaranteed operation and may trigger undefined behavior or OFF-state detection (MON_OFF threshold is 140–215 mV). Voltages above 5.5 V exceed absolute maximum ratings and risk permanent damage. For extended ranges, external level-shifting or scaling circuits are required prior to MON pin connection.
What safety certifications apply to the TPS389C0300CRTERQ1?
The TPS389C0300CRTERQ1 is AEC-Q100 qualified (Grade 1, HBM ESD Level 2, CDM Level C7B) and documented as functional safety-capable per ISO 26262, with systematic capability and hardware capability both rated up to ASIL D. It includes integrated safety mechanisms such as CRC/PEC for I²C data integrity, BIST at power-on reset, thermal shutdown with hysteresis, and redundant HF/LF fault detection - all verified and supported by TI's safety documentation package.
TPS389C0300CRTERQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 200ms Typical
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 16-WQFN (3x3)
TPS389C0300CRTERQ1 FAQ
1.How can I place an order for TPS389C0300CRTERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS389C0300CRTERQ1 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 TPS389C0300CRTERQ1 reliable?
The price and inventory of TPS389C0300CRTERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS389C0300CRTERQ1 is usually 5 days.
3.What payment methods are accepted for TPS389C0300CRTERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS389C0300CRTERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS389C0300CRTERQ1?
TPS389C0300CRTERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS389C0300CRTERQ1 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 TPS389C0300CRTERQ1?
For technical support, including TPS389C0300CRTERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS389C0300CRTERQ1 requirements.
6.How does Aetrix verify that TPS389C0300CRTERQ1 is sourced from the original manufacturer or authorized distributors?
All TPS389C0300CRTERQ1 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 TPS389C0300CRTERQ1 meets industry standards.
7.What is the process for return or replacement of TPS389C0300CRTERQ1?
All TPS389C0300CRTERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS389C0300CRTERQ1, 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 TPS389C0300CRTERQ1 part is unused and in its original packaging.
Return procedure for TPS389C0300CRTERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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