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Texas Instruments TXB0102DCURG4
- Part No.:
- TXB0102DCURG4
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
TXB0102DCURG4.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:12,345
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Product details
Overview
TXB0102DCURG4 from Texas Instruments is a 2-bit bidirectional voltage-level translator with auto direction sensing, supporting 1.2 V to 3.6 V on A port and 1.65 V to 5.5 V on B port (VCCA ≤ VCCB), ±15-kV HBM ESD protection on B port, 4-µA max ICC, and VCC isolation. It enables low-voltage interconnect between mixed-supply domains in mobile SoC interfaces.
For engineers reviewing the TXB0102DCURG4 datasheet, TXB0102DCURG4 pinout, TXB0102DCURG4 application, or TXB0102DCURG4 equivalent, key selection criteria include auto-direction operation without external control, Ioff partial-power-down support, nanosecond-scale propagation delay (as low as 0.8 ns), dual-rail supply independence, and NanoFree™ VSSOP packaging for space-constrained PCBs.
Technical Context
The TXB0102DCURG4 implements an auto-sensing bidirectional translation architecture that dynamically routes signal flow based on relative voltage transitions at A and B ports-no direction-control pin required. Its internal circuitry maintains high-impedance output states when either VCCA or VCCB is at GND, enabling safe power sequencing in multi-rail systems.
It uses separate A-port and B-port I/O structures referenced to VCCA and VCCB respectively, with OE input tied to VCCA. The device supports full 2-bit channel-to-channel skew control (≤0.5 ns) and delivers up to 100 Mbps data rate across 1.8 V–5 V combinations while maintaining sub-5 ns typical propagation delay in both directions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| A-port voltage range | 1.2 V to 3.6 V - Enables interface with 1.2-V/1.5-V/1.8-V/2.5-V/3.3-V logic domains |
| B-port voltage range | 1.65 V to 5.5 V - Supports 1.8-V/2.5-V/3.3-V/5-V peripherals including USB PHYs and display drivers |
| Max data rate | 100 Mbps - Sufficient for high-speed I²C, SPI, and GPIO expansion in handheld applications |
| ESD rating (B port) | ±15-kV HBM - Meets IEC 61000-4-2 Level 4 system-level ESD robustness for exposed I/O |
| ICC (max) | 4 µA - Enables always-on level translation in battery-powered sleep modes |
| tpd (min) | 0.8 ns - Ensures timing closure for 100+ MHz clocked interfaces with minimal added latency |
| VCC isolation | Active - All outputs enter high-Z if either VCCA or VCCB = 0 V, preventing backdrive during power-up/down |
Pinout & Package
The TXB0102DCURG4 is packaged in an 8-pin VSSOP (DCU) measuring 2.30 mm × 2.00 mm, part of Texas Instruments' NanoFree™ technology where the die serves as the package - eliminating bond wires and reducing parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| B2 | I/O (B-port) | B-side bidirectional data line referenced to VCCB; supports 1.65–5.5 V logic levels |
| GND | Power return | Common ground reference for both A and B ports; must be low-impedance for noise immunity |
| VCCA | Supply rail | A-port supply input (1.2–3.6 V); OE input is referenced to this rail |
| A2 | I/O (A-port) | A-side bidirectional data line referenced to VCCA; supports 1.2–3.6 V logic levels |
| A1 | I/O (A-port) | Second A-side bidirectional data line; paired with A2 for 2-bit parallel translation |
| OE | Enable control | Active-high enable referenced to VCCA; pull low to place all I/Os in high-impedance state |
| VCCB | Supply rail | B-port supply input (1.65–5.5 V); must be ≥ VCCA per design constraint |
| B1 | I/O (B-port) | Second B-side bidirectional data line; completes 2-bit translation path with B2 |
Key Features
| Feature | Design Value |
|---|---|
| Auto-direction sensing | Eliminates need for external direction-control signals or logic, simplifying PCB routing and firmware |
| Ioff partial-power-down | Blocks current backflow when either VCCA or VCCB is unpowered, protecting upstream drivers during hot-plug or brownout |
| NanoFree™ VSSOP package | 2.3 mm × 2.0 mm footprint with die-as-package construction reduces trace inductance and improves signal integrity |
| VCC isolation | Guarantees all outputs go high-Z if either supply drops to GND - critical for safe power sequencing in multi-rail SoCs |
| ±15-kV B-port HBM ESD | Enables direct connection to connectors or displays without external TVS diodes in handheld form factors |
Applications
| Smartphone Baseband Interface | Tablet Display Subsystem |
|---|---|
Use Scenario: Interfacing a 1.2-V application processor GPIO bank to a 3.3-V display timing controller over a 2-bit control bus. IC Role / Device Role / Timing Role: Bidirectional level translator enabling clockless, direction-agnostic control signaling between mismatched voltage domains. Use Value: Eliminates need for discrete MOSFET translators or direction-control logic, reducing BOM count and layout area by >40%. | Use Scenario: Connecting a 1.8-V GPU I²C master to a 5-V touch controller and backlight driver on a shared bus. IC Role / Device Role / Timing Role: Voltage translator with auto-direction detection handling bidirectional SDA/SCL traffic without protocol interference. Use Value: Maintains I²C timing compliance (≤100 kHz standard mode) while supporting 100 Mbps burst capability for firmware updates. |
| Handset Audio Codec Link | Desktop PC Embedded Controller Bus |
Use Scenario: Bridging a 1.5-V baseband DSP serial interface to a 2.5-V audio codec's control register bus. IC Role / Device Role / Timing Role: Low-latency, low-power translator ensuring glitch-free register writes during audio playback. Use Value: 4-µA quiescent current extends standby battery life; sub-5 ns tpd prevents bit errors in 20-Mbps control streams. | Use Scenario: Isolating a 3.3-V EC (Embedded Controller) from a 5-V Super I/O chip in a laptop platform management subsystem. IC Role / Device Role / Timing Role: Voltage translator with VCC isolation ensuring EC retains control during 5-V rail brownout events. Use Value: Prevents EC lockup or false reset triggers during transient power faults - improving system reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXB0104DCUR | 4-bit version in same VSSOP-14 package; identical voltage ranges, ESD, and auto-direction architecture | Required when expanding beyond 2-bit control lines (e.g., parallel camera interface or multi-lane sensor buses) | Select TXB0104DCUR only when additional I/O channels are needed - avoids redesigning layout for higher pin count |
| TXS0102DCUR | Open-drain architecture with internal pull-ups; no VCC isolation; lower drive strength; optimized for I²C | Suitable for strictly I²C/SMBus applications but not push-pull GPIO or high-speed control buses | Choose TXS0102DCUR only for pure I²C translation where bus contention risk exists; TXB0102DCUR preferred for general-purpose bidirectional use |
Compared with TXB0104DCUR and TXS0102DCUR, the TXB0102DCURG4 offers optimal balance of compact 2-bit capacity, full VCC isolation, and push-pull drive - making it the default choice for mixed-voltage GPIO expansion where space, power, and safety margins are constrained.
Availability
TXB0102DCURG4 is available at Aetrix Electronics and suitable for smartphone baseband interfaces, tablet display subsystems, and handheld audio codec links requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for TXB0102DCURG4 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The TXB0102DCURG4 belongs to TI's voltage translation portfolio designed specifically for ultra-low-power, space-constrained portable devices requiring seamless interoperability between heterogeneous voltage domains.
FAQ
What is the maximum allowable voltage difference between VCCA and VCCB for reliable operation of TXB0102DCURG4?
The TXB0102DCURG4 requires VCCA ≤ VCCB at all times. While VCCA may range from 1.2 V to 3.6 V and VCCB from 1.65 V to 5.5 V, the absolute maximum differential is constrained by the condition that VCCA must not exceed VCCB. For example, 3.3 V on VCCA and 3.3 V on VCCB is valid, but 3.6 V on VCCA and 3.3 V on VCCB violates the specification and risks malfunction. This constraint ensures correct internal biasing of the pass-gate transistors.
Does TXB0102DCURG4 support true bidirectional data flow on each I/O pair without external direction control?
Yes, TXB0102DCURG4 implements auto-direction sensing using internal comparators that detect relative voltage transitions on A and B ports. When A1 rises before B1, the path enables A→B translation; when B1 rises first, it enables B→A. This eliminates the need for an external DIR pin or firmware-controlled GPIO, making it ideal for protocols like I²C or dynamic GPIO sharing where direction changes frequently.
Can TXB0102DCURG4 be used in systems where VCCA or VCCB may be powered down independently?
Yes - the TXB0102DCURG4 includes VCC isolation: if either VCCA or VCCB falls to GND, all outputs automatically enter high-impedance state. This prevents back-current injection into unpowered rails and protects upstream drivers during staggered power sequencing. However, OE must be pulled low via resistor during power-up to guarantee safe initialization.
What is the significance of the "G4" suffix in TXB0102DCURG4?
The "G4" suffix denotes TI's green packaging standard: lead-free, RoHS-compliant, and halogen-free construction. TXB0102DCURG4 meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), requires no bake prior to reflow, and is qualified for standard SnPb and Pb-free soldering processes - ensuring compatibility with modern high-volume SMT assembly lines.
How does the Ioff feature of TXB0102DCURG4 protect downstream circuitry during partial power-down?
The Ioff feature disables all output buffers when either VCCA or VCCB is at 0 V, blocking current flow through the I/O transistors. This prevents reverse current from a live rail (e.g., VCCB = 3.3 V) into a powered-down domain (e.g., VCCA = 0 V), avoiding latch-up, overheating, or damage to the source driver. Measured Ioff leakage is ±2 µA across –40°C to +85°C, confirming robustness in real-world thermal conditions.
TXB0102DCURG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 2
- Voltage - VCCA:
- 1.2 V ~ 3.6 V
- Voltage - VCCB:
- 1.65 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- 100Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Auto-Direction Sensing
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VFSOP (0.091", 2.30mm Width)
TXB0102DCURG4 FAQ
1.How can I place an order for TXB0102DCURG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TXB0102DCURG4 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 TXB0102DCURG4 reliable?
The price and inventory of TXB0102DCURG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TXB0102DCURG4 is usually 5 days.
3.What payment methods are accepted for TXB0102DCURG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TXB0102DCURG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TXB0102DCURG4?
TXB0102DCURG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TXB0102DCURG4 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 TXB0102DCURG4?
For technical support, including TXB0102DCURG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TXB0102DCURG4 requirements.
6.How does Aetrix verify that TXB0102DCURG4 is sourced from the original manufacturer or authorized distributors?
All TXB0102DCURG4 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 TXB0102DCURG4 meets industry standards.
7.What is the process for return or replacement of TXB0102DCURG4?
All TXB0102DCURG4 units undergo pre-shipment inspection (PSI). If there is an issue with TXB0102DCURG4, 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 TXB0102DCURG4 part is unused and in its original packaging.
Return procedure for TXB0102DCURG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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