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Texas Instruments TXS0102DCURG4
- Part No.:
- TXS0102DCURG4
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
TXS0102DCURG4.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 8VSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TXS0102DCURG4 from Texas Instruments is a 2-bit bidirectional voltage-level translator IC designed for mixed-voltage digital interfacing between 1.65V–3.6V (A port) and 2.3V–5.5V (B port) domains, supporting both open-drain (2Mbps) and push-pull (24Mbps) signaling in I²C, SMBus, UART, and GPIO applications.
For engineers reviewing the TXS0102DCURG4 datasheet, TXS0102DCURG4 pinout, TXS0102DCURG4 application, or TXS0102DCURG4 equivalent, key selection considerations include VCCA ≤ VCCB constraint, integrated 10kΩ pull-ups per I/O, OE-controlled high-impedance state, no direction-control signal requirement, and pass-gate + one-shot edge-accelerator architecture enabling auto-direction sensing.
Technical Context
The TXS0102DCURG4 implements a dual-channel, auto-direction-sensing pass-gate architecture with integrated edge-rate accelerators (one-shots) that detect rising edges and temporarily boost drive strength to ~50–70Ω for ~30ns-enabling 24Mbps push-pull operation without external direction control. Each channel operates independently with internal 10kΩ pull-up resistors on both A and B ports referenced to their respective supplies.
VCCA must be ≤ VCCB and within 1.65V–3.6V; VCCB ranges 2.3V–5.5V. The OE input (referenced to VCCA) enables/disables all I/Os into high-impedance mode. VCC isolation ensures both ports enter Hi-Z if either supply drops to GND, and no power-supply sequencing is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range A (VCCA) | 1.65V to 3.6V - defines minimum logic-high threshold and internal bias for A-port pass gates |
| Supply Range B (VCCB) | 2.3V to 5.5V - sets B-port output swing and internal pull-up reference; must be ≥ VCCA |
| Max Data Rate (Push-Pull) | 24Mbps - achievable with low-impedance drivers (<50Ω) and ≤20ns pulse width |
| Max Data Rate (Open-Drain) | 2Mbps - limited by RC time constant of internal 10kΩ pull-ups and load capacitance |
| Propagation Delay (tPHL/tPLH) | 1.3–6.8ns (push-pull, VCCA=3.3V/VCCB=5V) - determines timing budget for synchronous interfaces like I²C clock stretching |
| Output Enable/Disable Time | 200ns - defines minimum OE assertion/deassertion interval before valid data transfer resumes |
| ESD Rating (B Port HBM) | ±8kV - enables direct connection to external connectors or board-level I/O without additional protection |
Pinout & Package
The TXS0102DCURG4 is packaged in an 8-pin VSSOP (DCU) package measuring 2.0mm × 3.1mm, with exposed pad for thermal performance and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2 | I/O A-port | Bidirectional signals referenced to VCCA; auto-sensed direction; include internal 10kΩ pull-up to VCCA |
| B1, B2 | I/O B-port | Bidirectional signals referenced to VCCB; auto-sensed direction; include internal 10kΩ pull-up to VCCB |
| OE | Input (active-high) | Referenced to VCCA; pulls all I/Os to high-impedance when low; requires pulldown resistor for power-up safety |
| VCCA | Power supply A | Supplies A-port logic and internal bias circuitry; must be ≤ VCCB |
| VCCB | Power supply B | Supplies B-port logic and internal bias; enables translation up to 5.5V domains |
| GND | Ground | Common reference for both ports; required for proper pass-gate biasing and ESD path |
Key Features
| Feature | Design Value |
|---|---|
| No direction-control signal | Auto-direction sensing eliminates need for MCU GPIO or timing-critical control lines, simplifying firmware and PCB routing |
| Integrated 10kΩ pull-ups | Eliminates external resistors for open-drain I²C/SMBus, reducing BOM count and layout area |
| VCC isolation | Both ports enter Hi-Z if either VCCA or VCCB falls to GND - prevents back-powering and latch-up during partial power-down |
| One-shot edge acceleration | Temporarily lowers output impedance to ~50–70Ω for ~30ns on rising edges, enabling 24Mbps push-pull without signal degradation |
| Ioff partial-power-down | Leakage current ≤ ±2µA per port when unpowered - supports hot-swap and battery-backed subsystems |
Applications
| I²C Bus Level Translation | UART Signal Bridging |
|---|---|
Use Scenario: Interfacing a 3.3V microcontroller I²C master with a 5V sensor slave across mixed-voltage boards. IC Role / Device Role / Timing Role: Bidirectional level shifter handling SDA/SCL bidirectional signals with automatic direction detection and integrated pull-ups. Use Value: Eliminates external pull-up resistors and direction logic; maintains I²C timing compliance up to 1MHz standard mode with <6.8ns propagation delay. | Use Scenario: Connecting a 1.8V SoC UART TX/RX to a 3.3V modem interface with minimal component count. IC Role / Device Role / Timing Role: Asynchronous voltage translator supporting full-duplex UART at up to 2Mbps (open-drain) or higher with push-pull drivers. Use Value: Enables direct logic-level compatibility without level-shifting discrete FETs or dedicated transceivers; OE allows runtime bus isolation. |
| GPIO Expansion Interface | Hot-Swappable Peripheral Bridge |
Use Scenario: Extending GPIO from a 2.5V FPGA bank to control 5V industrial actuators or indicators. IC Role / Device Role / Timing Role: General-purpose bidirectional logic translator with configurable supply rails and robust ESD protection (±8kV HBM on B port). Use Value: Supports fast GPIO toggling (24Mbps push-pull), withstands connector-level ESD events, and enters safe Hi-Z on supply loss via VCC isolation. | Use Scenario: Enabling hot-plug capability for a 3.3V peripheral module inserted into a 5V carrier board with powered-backplane detection. IC Role / Device Role / Timing Role: Isolation enabler using OE control and VCC isolation to prevent backfeeding and ensure clean power-up sequencing. Use Value: Ioff leakage ≤ ±2µA and VCC isolation guarantee zero current flow when VCCA is unpowered, meeting hot-swap safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional voltage-level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXB0102RGTR | Active-drive push-pull outputs (no passive pull-ups); higher ICC; requires direction control for some modes | Better for high-speed, high-current push-pull only; unsuitable for native open-drain I²C without external pull-ups | Select TXB0102RGTR when driving heavy capacitive loads (>30pF) or requiring guaranteed 50MHz+ data rates with active drive |
| PCA9306DCUR | Passive FET-based translator; no internal pull-ups; requires external 10kΩ pull-ups on both sides; lower max speed (2Mbps open-drain only) | Lower power (nA quiescent), but lacks OE control and VCC isolation; not suitable for partial-power-down systems | Select PCA9306DCUR for ultra-low-power I²C bridges where OE and VCC isolation are unnecessary and external pull-ups are acceptable |
Compared with TXS0102DCURG4, TXB0102RGTR offers stronger active drive but adds complexity and power; PCA9306DCUR reduces static current but sacrifices integration, safety features, and flexibility-making TXS0102DCURG4 optimal for mixed-mode, safety-critical, or space-constrained I²C/UART bridging.
Availability
TXS0102DCURG4 is available at Aetrix Electronics and suitable for I²C bus translation, UART bridging, GPIO expansion, and hot-swappable peripheral interfaces requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for TXS0102DCURG4 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 communications markets.
The TXS0102DCURG4 belongs to TI's Switch-type voltage translator family, engineered specifically for seamless, directionless logic-level bridging in resource-constrained, mixed-voltage embedded systems.
FAQ
What is the maximum allowable voltage difference between VCCA and VCCB for reliable operation of the TXS0102DCURG4?
The TXS0102DCURG4 requires VCCA ≤ VCCB at all times. VCCA may range from 1.65V to 3.6V, and VCCB from 2.3V to 5.5V - meaning the minimum valid difference is 0V (e.g., both at 3.3V), and the maximum is 3.85V (e.g., VCCA = 1.65V, VCCB = 5.5V). Exceeding VCCA > VCCB risks functional failure or damage, as confirmed in Section 5.3 of the TXS0102DCURG4 datasheet.
Does the TXS0102DCURG4 support true bidirectional communication on the same pin pair without external control signals?
Yes. The TXS0102DCURG4 uses auto-direction-sensing pass-gate architecture with edge-rate accelerators to enable true bidirectional data flow on each A/B pin pair without any direction-control signal. This is intrinsic to the TXS0102DCURG4 design and validated across all recommended operating conditions - allowing single-wire protocols like I²C SDA to operate natively.
Can the TXS0102DCURG4 be used to translate a 5V open-drain I²C bus to a 1.8V microcontroller, and what are the key constraints?
Yes - set VCCA = 1.8V and VCCB = 5V. Key constraints: (1) VCCA must be ≤ VCCB (satisfied), (2) B-port HBM ESD is ±8kV, suitable for board-level I²C, and (3) max open-drain data rate is 2Mbps, well above standard-mode I²C (100kHz). The TXS0102DCURG4's integrated 10kΩ B-port pull-ups to 5V eliminate external components, and OE allows software-controlled bus isolation.
What happens to the TXS0102DCURG4 I/O pins when VCCA = 0V but VCCB = 5V is applied?
When VCCA = 0V (GND), the TXS0102DCURG4 activates its VCC isolation feature: all A1, A2, B1, and B2 pins enter a high-impedance state regardless of VCCB or OE status. This prevents back-powering the 1.8V/3.3V domain and is a defined safety behavior - not a fault condition. The TXS0102DCURG4 remains undamaged and resumes normal operation once VCCA is restored.
Is a pull-down resistor required on the OE pin of the TXS0102DCURG4, and if so, what value is recommended?
Yes - TI recommends tying OE to GND via a pulldown resistor during power-up to ensure all I/Os remain in high-impedance until firmware intentionally enables the device. The minimum value depends on the current-sourcing capability of the driver controlling OE; typical values range from 4.7kΩ to 10kΩ. This ensures reliable Hi-Z startup and avoids bus contention, as specified in the TXS0102DCURG4 functional description.
TXS0102DCURG4 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:
- 1.65 V ~ 3.6 V
- Voltage - VCCB:
- 2.3 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain, Push-Pull
- Data Rate:
- 24Mbps
- 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)
TXS0102DCURG4 FAQ
1.How can I place an order for TXS0102DCURG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TXS0102DCURG4 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 TXS0102DCURG4 reliable?
The price and inventory of TXS0102DCURG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TXS0102DCURG4 is usually 5 days.
3.What payment methods are accepted for TXS0102DCURG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TXS0102DCURG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TXS0102DCURG4?
TXS0102DCURG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TXS0102DCURG4 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 TXS0102DCURG4?
For technical support, including TXS0102DCURG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TXS0102DCURG4 requirements.
6.How does Aetrix verify that TXS0102DCURG4 is sourced from the original manufacturer or authorized distributors?
All TXS0102DCURG4 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 TXS0102DCURG4 meets industry standards.
7.What is the process for return or replacement of TXS0102DCURG4?
All TXS0102DCURG4 units undergo pre-shipment inspection (PSI). If there is an issue with TXS0102DCURG4, 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 TXS0102DCURG4 part is unused and in its original packaging.
Return procedure for TXS0102DCURG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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