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Texas Instruments TXS0102VQDCURQ1
- Part No.:
- TXS0102VQDCURQ1
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
TXS0102VQDCURQ1.pdf
- Description:
- AUTOMOTIVE 2-BIT BIDIRECTIONAL L
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TXS0102VQDCURQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified, 2-bit bidirectional voltage-level translator for automotive I²C, SMBus, and GPIO interfaces. It supports 1.65V–3.6V on A port and 2.3V–5.5V on B port (VCCA ≤ VCCB), delivers up to 24 Mbps in push-pull mode, and features integrated 10 kΩ pull-ups, VCC isolation, and no direction-control signal requirement - enabling seamless mixed-voltage communication between 1.8V/2.5V/3.3V and 5V domains in body control modules and ADAS sensor hubs.
For engineers reviewing the TXS0102VQDCURQ1 datasheet, TXS0102VQDCURQ1 pinout, TXS0102VQDCURQ1 application, or TXS0102VQDCURQ1 equivalent, this page provides verified electrical specifications, automotive-grade ESD ratings (±5000 V HBM on B port), thermal metrics (RθJA = 239.8°C/W), OE-controlled high-impedance state behavior, and validated open-drain/push-pull timing performance across –40°C to +125°C ambient operation.
Technical Context
The TXS0102VQDCURQ1 employs a pass-gate architecture with edge-rate accelerator one-shot circuits to detect and speed rising edges without external direction control. Its auto-direction sensing enables independent bidirectional translation per channel using N-channel transistors biased at ~VT above the low-side VCC rail.
Each A-port I/O includes a 10 kΩ pull-up to VCCA; each B-port I/O includes a 10 kΩ pull-up to VCCB. The OE input (referenced to VCCA) places all I/Os in high-impedance when low, supporting partial-power-down via Ioff (≤2 µA), and eliminates power-supply sequencing constraints since either VCCA or VCCB may ramp first.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| A-port voltage range | 1.65 V to 3.6 V - supports 1.8 V/2.5 V/3.3 V logic domains; requires VCCA ≤ VCCB |
| B-port voltage range | 2.3 V to 5.5 V - enables interface to 3.3 V/5 V microcontrollers and peripherals |
| Max data rate (push-pull) | 24 Mbps - sufficient for high-speed I²C Fast-mode Plus (1 Mbps) and UART burst transfers |
| Max data rate (open-drain) | 2 Mbps - compliant with standard I²C (100 kHz), Fast-mode (400 kHz), and Fast-mode Plus (1 MHz) |
| ESD rating (B port HBM) | ±5000 V - exceeds AEC-Q100-002 requirements for automotive under-hood environments |
| Operating temperature | –40°C to +125°C ambient - qualified for Grade 1 automotive applications including engine control and ADAS |
| VCC isolation | Both ports enter high-impedance if either VCCA or VCCB = GND - prevents backfeeding and ensures safe power sequencing |
Pinout & Package
TXS0102VQDCURQ1 is housed in an 8-pin DCU (VSSOP) package measuring 2 mm × 3.1 mm, optimized for space-constrained automotive PCBs and compatible with standard surface-mount reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | I/O referenced to VCCA | Bidirectional data line for A-side logic (1.65–3.6 V); auto-senses direction; includes internal 10 kΩ pull-up to VCCA |
| A2 | I/O referenced to VCCA | Second bidirectional A-side channel; functionally identical to A1; supports dual-line protocols like I²C SDA/SCL |
| B1 | I/O referenced to VCCB | B-side bidirectional data line (2.3–5.5 V); integrates 10 kΩ pull-up to VCCB; handles higher-voltage peripherals |
| B2 | I/O referenced to VCCB | Second B-side channel; enables full 2-bit translation without external components or direction signals |
| GND | Ground reference | Common return path for both supply domains; must be low-impedance to minimize noise coupling between VCCA/VCCB |
| OE | Output enable (active-high) | Referenced to VCCA; drives all I/Os into high-impedance when low; requires pulldown resistor during power-up for fail-safe isolation |
| VCCA | A-port supply | Power rail for A-side logic; sets VIH/VIL thresholds and pull-up strength; must be ≤ VCCB |
| VCCB | B-port supply | Power rail for B-side logic; determines output drive capability and VOL/VOH margins; enables 5 V compatibility |
Key Features
| Feature | Design Value |
|---|---|
| No direction-control signal required | Auto-direction sensing per channel eliminates need for external control lines, simplifying routing and reducing MCU GPIO usage |
| Integrated 10 kΩ pull-ups | Eliminates external resistors for I²C/SMBus open-drain operation; reduces BOM count and board area in automotive sensor nodes |
| VCC isolation | Automatic high-impedance state when either VCCA or VCCB is at GND - prevents current leakage and bus contention during partial power-down |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2000 V (A port) / ±5000 V (B port), ensuring reliability in engine bay and ADAS ECUs |
| Edge-rate acceleration | One-shot circuitry reduces rise time by bypassing internal pull-ups for ~30 ns during low-to-high transitions, sustaining 24 Mbps push-pull throughput |
Applications
| I²C Level Translation | SMBus Communication Bridge |
|---|---|
|
Use Scenario: Interfacing a 1.8 V automotive microcontroller to a 3.3 V EEPROM or temperature sensor over I²C bus. IC Role / Device Role / Timing Role: Bidirectional voltage translator handling SDA/SCL lines with automatic direction detection and integrated pull-ups. Use Value: Eliminates external pull-up resistors and direction logic; maintains I²C timing compliance up to 1 MHz while meeting AEC-Q100 ESD and thermal requirements. |
Use Scenario: Connecting a 2.5 V battery management IC to a 5 V system monitor IC via SMBus in EV powertrain control units. IC Role / Device Role / Timing Role: Voltage-level shifter enabling bidirectional SMBus packet exchange between disparate supply domains without protocol modification. Use Value: Supports SMBus Alert Response Address (ARA) and host notify functionality across voltage boundaries while providing VCC isolation during sleep mode. |
| GPIO Voltage Bridging | UART Signal Translation |
|
Use Scenario: Routing GPIO status signals from a 3.3 V ADAS camera module to a 5 V domain controller in a surround-view system. IC Role / Device Role / Timing Role: Two-channel level shifter translating push-pull or open-drain GPIO states with <24 Mbps capability and OE-controlled tri-state. Use Value: Enables deterministic signal integrity across voltage domains; OE pin allows dynamic isolation during firmware updates or fault recovery sequences. |
Use Scenario: Isolating UART TX/RX lines between a 1.8 V infotainment SoC and a 3.3 V telematics modem in connected vehicle gateways. IC Role / Device Role / Timing Role: Asynchronous bidirectional translator supporting UART baud rates up to 3 Mbps with sub-10 ns propagation skew. Use Value: Maintains UART frame integrity across voltage domains; integrated pull-ups reduce component count and improve EMC robustness in noisy automotive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXB0102RUGR | Requires direction-control signal; supports 1.2 V–3.6 V on both sides; no integrated pull-ups; higher max data rate (100 Mbps) | Better suited for push-pull-only systems with available GPIO for DIR control; not qualified for automotive use | Select when higher speed and symmetric voltage ranges are needed, and AEC-Q100 qualification is not required. |
| SN74AVC2T244RSWR | Two-channel, dual-supply, unidirectional translator with DIR control; no auto-direction; no integrated pull-ups; 3.6 V max on both sides | Used where direction is fixed per channel (e.g., dedicated TX/RX lines); lacks open-drain support and automotive qualification | Choose for cost-sensitive industrial designs requiring separate transmit/receive paths and no I²C/SMBus compatibility. |
Compared with TXB0102RUGR and SN74AVC2T244RSWR, TXS0102VQDCURQ1 uniquely combines AEC-Q100 Grade 1 qualification, auto-direction sensing, integrated pull-ups, and VCC isolation - making it the only drop-in solution for automotive I²C/SMBus bridging without redesigning control logic or adding discrete components.
Availability
TXS0102VQDCURQ1 is available at Aetrix Electronics and suitable for automotive body electronics, ADAS sensor fusion modules, and EV battery management systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for TXS0102VQDCURQ1 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-grade silicon, with decades of experience delivering high-reliability components for safety-critical systems.
The TXS0102VQDCURQ1 belongs to TI's automotive-qualified "Switch" family of voltage translators, designed specifically to solve mixed-voltage interoperability challenges in modern vehicle architectures - especially for I²C, SMBus, and GPIO interfaces in ECUs subject to harsh thermal and ESD conditions.
FAQ
What is the maximum allowable voltage difference between VCCA and VCCB for TXS0102VQDCURQ1?
The TXS0102VQDCURQ1 requires VCCA ≤ VCCB at all times. Per datasheet Section 5.3, VCCA must be between 1.65 V and 3.6 V, and VCCB between 2.3 V and 5.5 V. Therefore, the minimum valid difference is 0 V (e.g., VCCA = 2.3 V, VCCB = 2.3 V), and the maximum is 3.85 V (e.g., VCCA = 1.65 V, VCCB = 5.5 V). Exceeding VCCA > VCCB risks latch-up or permanent damage.
Does TXS0102VQDCURQ1 support true bidirectional communication on both channels simultaneously?
Yes. TXS0102VQDCURQ1 supports independent, simultaneous bidirectional translation on A1↔B1 and A2↔B2 channels. Each channel uses auto-direction sensing based on local voltage differentials and edge detection - no shared control or arbitration is needed. This enables concurrent I²C SDA/SCL translation or dual GPIO signaling without conflict.
How does the OE pin behave during power-up, and what is the recommended tie-off strategy for TXS0102VQDCURQ1?
The OE pin is referenced to VCCA and must be held low during power-up to ensure all I/Os remain in high-impedance until both VCCA and VCCB are stable. TI recommends tying OE to GND via a pulldown resistor (value determined by driver sourcing capability). This prevents bus contention and undefined states. OE must not be driven high until supplies are fully ramped and regulated.
Can TXS0102VQDCURQ1 be used with 1.2 V logic on the A port?
No. TXS0102VQDCURQ1 specifies a minimum A-port supply of 1.65 V (Section 5.3). Applying 1.2 V to VCCA violates the recommended operating conditions and may result in incorrect logic thresholds, increased VOL, or failure to recognize high-level inputs. For 1.2 V interfaces, consider TI's TXS0108E or other members of the TXS family with lower VCCA support.
What is the impact of adding external pull-down resistors on TXS0102VQDCURQ1 I/O lines?
Adding external pull-down resistors lowers VOH (high-level output voltage) per Equation 1 in the datasheet: VOH = VCCx × RPD / (RPD + 10 kΩ). This can violate VIH requirements of downstream receivers. External pull-downs also increase static current and may degrade noise margins. They are generally unnecessary and discouraged unless specific system-level biasing is required - and then only after verifying VOL/VOH compliance across temperature and voltage corners.
TXS0102VQDCURQ1 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:
- 1.65 V ~ 3.6 V
- Voltage - VCCB:
- 2.3 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain, Push-Pull, Tri-State
- Data Rate:
- 24Mbps
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VFSOP (0.091", 2.30mm Width)
TXS0102VQDCURQ1 FAQ
1.How can I place an order for TXS0102VQDCURQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TXS0102VQDCURQ1 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 TXS0102VQDCURQ1 reliable?
The price and inventory of TXS0102VQDCURQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TXS0102VQDCURQ1 is usually 5 days.
3.What payment methods are accepted for TXS0102VQDCURQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TXS0102VQDCURQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TXS0102VQDCURQ1?
TXS0102VQDCURQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TXS0102VQDCURQ1 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 TXS0102VQDCURQ1?
For technical support, including TXS0102VQDCURQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TXS0102VQDCURQ1 requirements.
6.How does Aetrix verify that TXS0102VQDCURQ1 is sourced from the original manufacturer or authorized distributors?
All TXS0102VQDCURQ1 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 TXS0102VQDCURQ1 meets industry standards.
7.What is the process for return or replacement of TXS0102VQDCURQ1?
All TXS0102VQDCURQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TXS0102VQDCURQ1, 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 TXS0102VQDCURQ1 part is unused and in its original packaging.
Return procedure for TXS0102VQDCURQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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