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Texas Instruments TXS0102DQER
- Part No.:
- TXS0102DQER
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
TXS0102DQER.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 8X2SON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TXS0102DQER from Texas Instruments is a 2-bit bidirectional voltage-level translator with auto-direction sensing, enabling seamless logic-level translation between 1.65V–3.6V (A port) and 2.3V–5.5V (B port) domains without direction-control signals. It supports up to 24Mbps push-pull and 2Mbps open-drain data rates, integrates 10kΩ on-chip pull-ups per I/O, and features VCC isolation and Ioff partial-power-down capability - deployed in I²C/SMBus, UART, and GPIO interconnects between mixed-voltage microcontrollers and peripherals.
For engineers reviewing the TXS0102DQER datasheet, TXS0102DQER pinout, TXS0102DQER application, or TXS0102DQER equivalent, this page delivers verified electrical specifications, package-specific pin functions, real-world interface constraints (e.g., OE timing, edge-rate acceleration behavior), thermal metrics for DQE (X2SON-8), and validated alternatives for voltage translation in space-constrained embedded systems.
Technical Context
The TXS0102DQER employs a pass-gate architecture with integrated one-shot edge-rate accelerators that detect rising edges and temporarily boost drive strength (to ~50–70Ω) for ~30ns, enabling high-speed bidirectional translation without external direction control. Its dual-rail design enforces VCCA ≤ VCCB and uses gate-bias circuitry referenced to the lower-voltage rail to maintain conduction in both directions.
Each channel operates autonomously: A1/A2 are referenced to VCCA and include internal 10kΩ pull-ups to VCCA; B1/B2 are referenced to VCCB with matching 10kΩ pull-ups to VCCB. The OE input (referenced to VCCA) disables all I/Os into high-impedance state with 200ns enable/disable times, and VCC isolation ensures Hi-Z operation if either supply drops to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 1.65V to 3.6V - defines minimum logic-high threshold and power domain for A-port I/Os and OE input |
| VCCB Range | 2.3V to 5.5V - sets B-port logic compatibility and must be ≥ VCCA; enables direct interfacing with 3.3V/5V peripherals |
| Max Data Rate | 24Mbps (push-pull), 2Mbps (open-drain) - determines usable bandwidth for I²C clock stretching, UART baud rates, or GPIO toggling |
| Propagation Delay | 1.3–6.8ns (tPHL/tPLH, depending on VCCA/VCCB and mode) - impacts timing margin in high-speed synchronous interfaces |
| Output Enable Time | 200ns (ten) - minimum delay after OE goes high before valid signal translation resumes |
| ESD Rating (B Port) | ±8kV HBM - supports robust handling in board assembly and field-replaceable module environments |
| Thermal Resistance (RθJA) | 229.6°C/W (DQE package) - informs derating requirements under sustained 14.4µA combined supply current |
Pinout & Package
TXS0102DQER is packaged in an 8-pin X2SON (DQE) measuring 1.4mm × 1mm, optimized for ultra-compact PCB layouts. The package has no exposed pad and requires solder paste stencil optimization for reliable reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | I/O (A-port) | Bidirectional signal referenced to VCCA; includes internal 10kΩ pull-up to VCCA |
| A2 | I/O (A-port) | Second bidirectional A-port channel with identical VCCA-referenced behavior as A1 |
| B1 | I/O (B-port) | Bidirectional signal referenced to VCCB; includes internal 10kΩ pull-up to VCCB |
| B2 | I/O (B-port) | Second bidirectional B-port channel with identical VCCB-referenced behavior as B1 |
| GND | Ground | Common reference for both power domains; must be low-inductance connection to minimize noise coupling |
| OE | Input (active-high) | Enable control referenced to VCCA; pulling low places all I/Os in high-impedance state |
| VCCA | Power (A-port) | Supplies A-side logic and OE input; must be ≤ VCCB and within 1.65V–3.6V range |
| VCCB | Power (B-port) | Supplies B-side logic; sets B-port output voltage levels and must be ≥2.3V and ≤5.5V |
Key Features
| Feature | Design Value |
|---|---|
| No direction-control signal required | Auto-direction sensing via pass-gate biasing eliminates need for MCU GPIO or timing-critical control lines |
| Integrated 10kΩ pull-ups | Eliminates external resistors for I²C/SMBus open-drain operation; reduces BOM count and layout area |
| VCC isolation | Automatic Hi-Z on both ports if either VCCA or VCCB falls to GND - prevents back-powering and latch-up during power sequencing |
| Edge-rate acceleration | One-shot circuitry reduces rise time by boosting drive strength for ~30ns, sustaining 24Mbps push-pull performance |
| Ioff partial-power-down | Leakage < ±2µA per port when unpowered - enables safe hot-insertion and battery-backed system states |
Applications
| I²C Bus Level Translation | UART Voltage Bridging |
|---|---|
Use Scenario: Interfacing a 1.8V microcontroller I²C master with a 3.3V sensor slave on shared SDA/SCL lines. IC Role / Device Role / Timing Role: Bidirectional level shifter managing clock/data arbitration and open-drain pull-up sourcing without direction control. Use Value: Eliminates external pull-ups and direction logic while maintaining SMBus compliance and 1MHz I²C timing margins. |
Use Scenario: Connecting a 2.5V SoC UART TX/RX to a 5V industrial modem requiring logic-level compatibility. IC Role / Device Role / Timing Role: Asymmetric voltage translator supporting full-duplex signal translation with independent A/B supply domains. Use Value: Enables direct UART link without level-shifting ICs or discrete MOSFET solutions, reducing latency and component count. |
| GPIO Expansion Interface | Hot-Swappable Module Communication |
Use Scenario: Extending GPIOs from a 3.3V host processor to control 5V relays or LEDs on a daughterboard. IC Role / Device Role / Timing Role: Push-pull-capable translator driving moderate capacitive loads (<15pF) at up to 24Mbps toggle rate. Use Value: Delivers fast, deterministic GPIO response with built-in ESD protection (8kV HBM on B port) for industrial control. |
Use Scenario: Enabling plug-and-play communication between a mainboard (1.8V I/O) and hot-swappable peripheral modules (3.3V I/O). IC Role / Device Role / Timing Role: Isolation-aware translator that enters Hi-Z when VCCA or VCCB is unpowered, preventing backfeed during insertion/removal. Use Value: Ensures safe hot-swap operation without external power sequencing circuitry or isolation FETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXS0104DQER | 4-channel version in same DQE package; identical per-channel specs but higher total supply current (ICCA+ICCB = 22.4µA typical) | Required when translating four signals (e.g., I²C + two GPIOs); not drop-in for 2-signal designs due to pinout mismatch | Select TXS0104DQER only when additional channels are needed - avoids redesign but increases quiescent current |
| PCA9306DCUR | 2-channel translator with separate DIR pin; no edge-rate accelerator; max 2Mbps (open-drain only); requires external pull-ups | Suitable for low-speed I²C where timing margin is ample; lacks push-pull support and auto-direction capability | Choose PCA9306DCUR for cost-sensitive, low-bandwidth applications where direction control is acceptable and board space allows external resistors |
Compared with TXS0102DQER, TXS0104DQER offers scalability at the cost of higher static current, while PCA9306DCUR trades performance and integration for lower unit cost and simpler biasing - making TXS0102DQER optimal for space-constrained, high-speed mixed-voltage GPIO and I²C bridging.
Availability
TXS0102DQER is available at Aetrix Electronics and suitable for I²C bus translation, UART bridging, GPIO expansion, and hot-swappable module interfaces requiring stable component supply across automotive infotainment, industrial PLCs, and portable medical devices.
Supply support for TXS0102DQER 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 connectivity technologies, with decades of expertise in interface solutions and power management ICs.
The TXS0102DQER belongs to TI's Switch-type voltage translator family, engineered specifically for compact, high-speed bidirectional level shifting in space-constrained mixed-voltage systems without external direction control or pull-up components.
FAQ
What is the maximum supported data rate for TXS0102DQER in push-pull mode?
The TXS0102DQER supports up to 24Mbps in push-pull mode when operating with VCCA = 1.8V and VCCB = 5V, as specified in Section 5.9 of the datasheet. This rating assumes proper PCB layout, load capacitance ≤15pF, and driver output impedance <50Ω. At lower VCCA/VCCB combinations (e.g., 3.3V/3.3V), the maximum rate is 23Mbps. TXS0102DQER achieves this via integrated one-shot edge-rate acceleration circuitry.
Does TXS0102DQER require external pull-up resistors for I²C operation?
No, TXS0102DQER includes internal 10kΩ pull-up resistors on both A-port (to VCCA) and B-port (to VCCB) I/Os, eliminating the need for external resistors in standard I²C/SMBus open-drain configurations. These internal pull-ups are automatically disabled when OE is low. TXS0102DQER thus simplifies I²C bus design while maintaining compatibility with standard protocol timing requirements.
Can TXS0102DQER operate with VCCA > VCCB?
No, TXS0102DQER requires VCCA ≤ VCCB per datasheet Section 5.3 and Figure 7-1 architecture. If VCCA exceeds VCCB, the pass-gate biasing fails and translation becomes unreliable or nonfunctional. Valid combinations include 1.8V/3.3V, 2.5V/5V, and 3.3V/5V - but never 3.3V/2.5V. TXS0102DQER enforces this constraint through its internal gate-bias network referenced to the lower supply rail.
What is the function of the OE pin on TXS0102DQER, and how should it be handled during power-up?
The OE (output enable) pin on TXS0102DQER is an active-high input referenced to VCCA that places all I/Os in high-impedance state when driven low. To ensure Hi-Z during power-up, tie OE to GND via a pulldown resistor (e.g., 10kΩ). TXS0102DQER requires 200ns after OE rises to VCCA before valid translation begins - critical for synchronizing with power-rail ramp rates in multi-rail systems.
Is TXS0102DQER compatible with 1.2V logic systems?
No, TXS0102DQER does not support 1.2V logic. Its A-port minimum supply is 1.65V (VCCA), and B-port minimum is 2.3V (VCCB). Attempting to operate below these thresholds violates recommended conditions and risks undefined behavior, increased VOL, or failure to recognize logic-high inputs. For 1.2V interfaces, consider TI's TXS0108E or similar 1.2V-compatible translators - TXS0102DQER is strictly for 1.65V–3.6V / 2.3V–5.5V translation.
TXS0102DQER 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
- Data Rate:
- 24Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Auto-Direction Sensing
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-XFDFN
TXS0102DQER FAQ
1.How can I place an order for TXS0102DQER through Aetrix?
Please submit a Request for Quotation (RFQ) for TXS0102DQER 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 TXS0102DQER reliable?
The price and inventory of TXS0102DQER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TXS0102DQER is usually 5 days.
3.What payment methods are accepted for TXS0102DQER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TXS0102DQER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TXS0102DQER?
TXS0102DQER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TXS0102DQER 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 TXS0102DQER?
For technical support, including TXS0102DQER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TXS0102DQER requirements.
6.How does Aetrix verify that TXS0102DQER is sourced from the original manufacturer or authorized distributors?
All TXS0102DQER 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 TXS0102DQER meets industry standards.
7.What is the process for return or replacement of TXS0102DQER?
All TXS0102DQER units undergo pre-shipment inspection (PSI). If there is an issue with TXS0102DQER, 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 TXS0102DQER part is unused and in its original packaging.
Return procedure for TXS0102DQER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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