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Texas Instruments PCA9306TDCURQ1
- Part No.:
- PCA9306TDCURQ1
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PCA9306TDCURQ1.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,661
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Product details
Overview
PCA9306TDCURQ1 from Texas Instruments is an AEC-Q100 Grade 2 qualified dual bidirectional I²C/SMBus voltage-level translator IC for automotive systems. It enables seamless level translation between 1.2 V and 5 V domains without direction control, supports ≤400-kHz I²C operation with <1.5 ns max propagation delay, and features 5-V-tolerant I/Os and 3.5-Ω ON-state resistance-used in instrument clusters and driver assistance camera interfaces.
For engineers reviewing the PCA9306TDCURQ1 datasheet, PCA9306TDCURQ1 pinout, PCA9306TDCURQ1 application, or PCA9306TDCURQ1 equivalent, key selection criteria include bidirectional translation capability across mixed-voltage I²C buses, EN-controlled isolation for bus segmentation, automotive-grade ESD robustness (HBM ±2000 V), thermal performance (RθJA = 275.5°C/W), and VSSOP-8 flow-through routing compatibility.
Technical Context
The PCA9306TDCURQ1 implements a dual-channel NFET-based pass-gate architecture with independent VREF1 (1.2–3.3 V) and VREF2 (1.8–5.5 V) supplies, enabling asymmetric voltage translation without direction pins. Its enable (EN) input controls simultaneous conduction of both SDA and SCL channels, delivering lock-up-free high-impedance isolation when disabled.
Each channel exhibits matched electrical characteristics: typical ON-resistance of 3.5 Ω at VEN = 4.5 V and IO = 64 mA, ≤1.5 ns max propagation delay under CL = 15 pF, and <6 pF off-capacitance-ensuring minimal signal distortion and bus capacitance compliance (<400 pF total system).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF1 Range | 1.2 V to 3.3 V - sets low-voltage I²C domain reference; enables translation from 1.2-V controllers to higher-voltage peripherals |
| VREF2 Range | 1.8 V to 5.5 V - sets high-voltage I²C domain reference; supports interface with 3.3-V or 5-V sensors/EEPROMs |
| Max Propagation Delay | 1.5 ns (CL = 15 pF) - ensures timing compliance for standard-mode (100 kHz) and fast-mode (400 kHz) I²C buses |
| ON-State Resistance | 3.5 Ω (typ, VEN = 4.5 V) - minimizes voltage drop and signal degradation during level translation |
| ESD Rating (HBM) | ±2000 V - meets AEC-Q100 Grade 2 requirements for automotive electronics reliability |
| Operating Temperature | –40°C to +105°C - qualified for under-hood and cabin-mounted automotive modules |
| Package | VSSOP-8 (2.30 mm × 2.00 mm) - compact surface-mount footprint supporting high-density PCB layouts |
Pinout & Package
The PCA9306TDCURQ1 is housed in an 8-pin VSSOP package (DCU) with 0.5-mm pitch and flow-through pinout optimized for I²C trace routing. Pin 1 is GND; pins 3/4 are SCL1/SDA1 (low-side I²C); pins 5/6 are SDA2/SCL2 (high-side I²C); pins 2/7 supply VREF1/VREF2; pin 8 is EN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for all internal circuitry; must be low-impedance connection to system ground plane |
| VREF1 (Pin 2) | Low-voltage domain supply | Bias reference for SCL1/SDA1 I/O; determines logic thresholds on low-voltage side |
| SCL1 (Pin 3) | Low-side serial clock | Open-drain I²C clock line referenced to VREF1; requires external pullup resistor |
| SDA1 (Pin 4) | Low-side serial data | Open-drain I²C data line referenced to VREF1; requires external pullup resistor |
| SDA2 (Pin 5) | High-side serial data | Open-drain I²C data line referenced to VREF2; 5-V tolerant; requires external pullup |
| SCL2 (Pin 6) | High-side serial clock | Open-drain I²C clock line referenced to VREF2; 5-V tolerant; requires external pullup |
| VREF2 (Pin 7) | High-voltage domain supply | Bias reference for SCL2/SDA2 I/O; establishes translation window with VREF1 |
| EN (Pin 8) | Enable control input | Active-high logic input; disables both channels into high-Z state when low; supports GPIO or power-rail control |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional translation without direction pin | Eliminates need for control logic or timing-critical direction signals-simplifies firmware and reduces BOM count |
| Flow-through pinout (SCL1–SCL2, SDA1–SDA2 aligned) | Enables straight PCB trace routing across I²C bus segments-reduces crosstalk and layout complexity |
| EN-controlled high-impedance isolation | Allows dynamic bus segmentation-enables frequency-mismatched I²C domains (e.g., 100 kHz vs. 400 kHz) to coexist |
| 5-V-tolerant I²C I/O ports | Permits direct interfacing with legacy 5-V peripherals without external clamping-reduces component count and board area |
| AEC-Q100 Grade 2 qualification | Validated for automotive use up to +105°C ambient-supports head unit, cluster, and ADAS camera deployments |
Applications
| Automotive Instrument Clusters | ADAS Camera Modules |
|---|---|
Use Scenario: Interfacing 1.8-V microcontroller with 3.3-V display driver and EEPROM in digital dashboards. IC Role / Device Role / Timing Role: Voltage-level translator bridging mixed-voltage I²C sub-buses while maintaining strict 400-kHz timing compliance. Use Value: Enables integration of lower-power MCUs with higher-voltage display peripherals without signal integrity loss or timing violations. | Use Scenario: Connecting 2.5-V image sensor to 5-V host processor over I²C in rear-view or surround-view camera systems. IC Role / Device Role / Timing Role: Bidirectional level shifter translating SDA/SCL signals between sensor and host domains with <1.5 ns propagation delay. Use Value: Preserves fast-mode I²C timing margins while protecting 2.5-V sensor I/O from 5-V bus transients. |
| Automotive Head Units | Body Control Modules (BCM) |
Use Scenario: Isolating infotainment SoC (3.3-V I²C) from legacy 5-V audio codecs and tuner ICs during firmware updates. IC Role / Device Role / Timing Role: EN-gated translator providing hot-plug-safe bus segmentation via GPIO-controlled enable. Use Value: Prevents bus contention and state-machine glitches during partial system reconfiguration-improves update reliability. | Use Scenario: Level-shifting I²C communication between 1.2-V ultra-low-power MCU and 3.3-V door-lock actuator drivers. IC Role / Device Role / Timing Role: Dual-channel translator enabling energy-efficient 1.2-V controller operation while driving standard 3.3-V peripherals. Use Value: Reduces system-wide power consumption without sacrificing interoperability with existing 3.3-V automotive subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C voltage-level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCA9617AQPWRQ1 | Integrated auto-direction sensing; includes built-in pullups; higher quiescent current (15 µA vs. 5 µA) | Preferred where direction control logic is unavailable; less suitable for ultra-low-power sleep modes | Select when automatic direction detection is required and board space permits larger 10-pin VSSOP package |
| SN74AVC4T245PWR | Unidirectional; requires separate direction control signal; supports wider voltage range (1.2–3.6 V) but no 5-V tolerance | Applicable only in non-I²C contexts with dedicated direction lines; not compliant with open-drain I²C bus topology | Choose only for non-I²C parallel bus translation; avoid for true I²C/SMBus due to lack of open-drain support and direction pin dependency |
Compared with TCA9617AQPWRQ1 and SN74AVC4T245PWR, the PCA9306TDCURQ1 uniquely delivers bidirectional I²C translation without direction control, 5-V I/O tolerance, and AEC-Q100 Grade 2 qualification-making it the only option validated for automotive I²C bus segmentation with EN-based isolation.
Availability
PCA9306TDCURQ1 is available at Aetrix Electronics and suitable for automotive instrument clusters, ADAS camera modules, and head unit designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for PCA9306TDCURQ1 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and automotive ICs with broad manufacturing scale and automotive qualification expertise.
The PCA9306TDCURQ1 belongs to TI's automotive-qualified I²C interface portfolio, designed specifically to solve mixed-voltage communication challenges in safety-critical vehicle subsystems such as digital clusters and vision systems.
FAQ
What is the maximum I²C bus speed supported by the PCA9306TDCURQ1?
The PCA9306TDCURQ1 supports standard-mode (100 kHz) and fast-mode (400 kHz) I²C operation. Its <1.5 ns maximum propagation delay (at CL = 15 pF) ensures timing compliance for 400 kHz buses, though system-level speed may be limited by total bus capacitance and pullup strength. The PCA9306TDCURQ1 itself does not support fast-mode plus (1 MHz) due to inherent switching delays.
Can the PCA9306TDCURQ1 translate between 1.2 V and 5 V I²C domains?
Yes-the PCA9306TDCURQ1 explicitly supports bidirectional voltage translation between 1.2 V (VREF1) and 5 V (VREF2) domains, as confirmed in its datasheet's "Voltage-Level Translation" section and Recommended Operating Conditions table. This capability enables interfacing ultra-low-power 1.2-V controllers with legacy 5-V automotive peripherals.
How does the EN pin function in the PCA9306TDCURQ1?
The EN pin on the PCA9306TDCURQ1 is an active-high enable input that controls conduction of both SDA and SCL channels simultaneously. When EN is high, the internal NFET switches turn on, allowing bidirectional signal flow; when EN is low, both channels enter a high-impedance state, electrically isolating the two I²C buses-critical for bus segmentation and hot-plug safety.
Is the PCA9306TDCURQ1 compatible with SMBus and PMBus protocols?
Yes-the PCA9306TDCURQ1 is explicitly stated in its datasheet Features and Description sections to be compatible with SMBus and PMBus, in addition to I²C. Its open-drain I/O structure, timing specifications, and voltage translation ranges align with SMBus 2.0/3.0 electrical requirements, including timeout and alert response behavior.
What package type and dimensions does the PCA9306TDCURQ1 use?
The PCA9306TDCURQ1 uses the VSSOP-8 (DCU) package with nominal body dimensions of 2.30 mm × 2.00 mm and 0.5-mm lead pitch. This compact, thermally efficient package is specified in TI's official datasheet Mechanical, Packaging, and Orderable Information section and supports automated SMT assembly.
PCA9306TDCURQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 2
- Voltage - VCCA:
- 1.2 V ~ 3.3 V
- Voltage - VCCB:
- 1.8 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain, Push-Pull
- Data Rate:
- -
- Operating Temperature:
- -45°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- Auto-Direction Sensing
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VFSOP (0.091", 2.30mm Width)
PCA9306TDCURQ1 FAQ
1.How can I place an order for PCA9306TDCURQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9306TDCURQ1 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 PCA9306TDCURQ1 reliable?
The price and inventory of PCA9306TDCURQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9306TDCURQ1 is usually 5 days.
3.What payment methods are accepted for PCA9306TDCURQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9306TDCURQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9306TDCURQ1?
PCA9306TDCURQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9306TDCURQ1 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 PCA9306TDCURQ1?
For technical support, including PCA9306TDCURQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9306TDCURQ1 requirements.
6.How does Aetrix verify that PCA9306TDCURQ1 is sourced from the original manufacturer or authorized distributors?
All PCA9306TDCURQ1 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 PCA9306TDCURQ1 meets industry standards.
7.What is the process for return or replacement of PCA9306TDCURQ1?
All PCA9306TDCURQ1 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9306TDCURQ1, 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 PCA9306TDCURQ1 part is unused and in its original packaging.
Return procedure for PCA9306TDCURQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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