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Texas Instruments TXS0108ENMER
- Part No.:
- TXS0108ENMER
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
TXS0108ENMER.pdf
- Description:
- IC TRANSLATOR BIDIR 20NFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:7,715
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Product details
Overview
TXS0108ENMER from Texas Instruments is an 8-bit bidirectional voltage-level translator IC designed for seamless logic-level interfacing between mismatched voltage domains-specifically translating signals between 1.4V–3.6V (A port, VCCA) and 1.65V–5.5V (B port, VCCB) systems without direction control. It supports up to 110Mbps push-pull data rates and integrates on-die pull-up resistors for open-drain compatibility. It is used in mobile device interconnects such as I²C, GPIO, and SD card interfaces between application processors and peripherals.
For engineers reviewing the TXS0108ENMER datasheet, TXS0108ENMER pinout, TXS0108ENMER application, or TXS0108ENMER equivalent, this page delivers verified electrical specs, package-confirmed pin functions, real-world use scenarios in handheld electronics, and two validated alternative parts with documented functional trade-offs.
Technical Context
The TXS0108ENMER employs a semi-buffered pass-gate architecture with edge-rate accelerator circuits (one-shot NMOS/PMOS drivers) on both A→B and B→A signal paths to enhance transition speed without external direction control. Its dual-rail design enables autonomous bidirectional translation across independent VCCA and VCCB supplies.
Each A-port I/O includes a 4kΩ/40kΩ switchable pull-up to VCCA; each B-port I/O includes a matching pull-up to VCCB. These are disabled when OE is low, placing all I/Os in high-impedance state. No power-supply sequencing is required-VCCA or VCCB may ramp first.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (A port) | VCCA = 1.4V to 3.6V - supports 1.5V, 1.8V, 2.5V, and 3.3V logic domains |
| Supply Range (B port) | VCCB = 1.65V to 5.5V - enables interface to 1.8V, 2.5V, 3.3V, and 5V peripherals |
| Max Data Rate | 110Mbps (push-pull) - sufficient for high-speed GPIO and fast-mode-plus I²C (1 Mbps) with margin |
| Open-Drain Support | 1.2Mbps with integrated B-port pull-ups - eliminates need for external resistors in I²C/SMBus |
| ESD Protection | ±8kV contact / ±6kV air (IEC 61000-4-2, B port); 2kV HBM (A port) - meets industrial handheld ESD requirements |
| Operating Temperature | –40°C to +85°C - qualified for consumer and industrial ambient conditions |
| Output Enable (OE) | Active-low, referenced to VCCA - ensures Hi-Z during power-up when pulled to GND via resistor |
Pinout & Package
TXS0108ENMER is packaged in a 20-pin UFBGA (ZXY) measuring 2.50mm × 3.00mm with bottom-side bump array. The package supports fine-pitch PCB assembly and thermal performance suitable for space-constrained mobile applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | I/O (VCCA-referenced) | 8-bit bidirectional data lines tied to lower-voltage domain (e.g., 1.8V processor GPIO) |
| B1–B8 | I/O (VCCB-referenced) | 8-bit bidirectional data lines tied to higher-voltage domain (e.g., 3.3V sensor or memory interface) |
| GND | Ground reference | Common return path for both supply rails; must be low-impedance and well-decoupled |
| OE | Input (VCCA-referenced) | Active-low enable; drives all I/Os into Hi-Z when low - critical for hot-swap and power sequencing |
| VCCA | Power input | Supplies A-port logic and internal bias circuitry; range 1.4V–3.6V, must ≤ VCCB |
| VCCB | Power input | Supplies B-port logic and pull-up networks; range 1.65V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| No direction-control signal required | Enables true bidirectional data flow on shared bus lines (e.g., I²C SDA) without MCU GPIO overhead or timing constraints |
| Integrated B-port pull-up resistors | 40kΩ (weak) / 4kΩ (strong) switchable pull-ups eliminate external components in open-drain designs |
| Asymmetric supply support (VCCA ≤ VCCB) | Allows safe level translation from low-voltage core logic (1.8V) to higher-voltage peripherals (3.3V/5V), preventing back-powering |
| Edge-rate accelerator circuitry | One-shot NMOS/PMOS drivers reduce rise/fall times - achieves 110Mbps push-pull operation despite passive gate architecture |
| High-impedance state on power-down | OE-controlled Hi-Z mode prevents signal contention during system reset or partial power loss |
Applications
| Mobile Processor-to-Peripheral Interface | I²C Bus Level Translation |
|---|---|
Use Scenario: Interfacing a 1.8V application processor GPIO bank to a 3.3V display timing controller in a smartphone. IC Role / Device Role / Timing Role: Bidirectional voltage translator enabling real-time control signaling without direction arbitration or added latency. Use Value: Eliminates discrete MOSFET translators and external pull-ups, reducing BOM count by ≥4 components per channel while maintaining 110Mbps timing margin. |
Use Scenario: Connecting a 1.8V microcontroller's I²C master to multiple 3.3V sensors (accelerometer, gyroscope) on same bus. IC Role / Device Role / Timing Role: Open-drain-compatible level shifter with integrated B-port pull-ups, supporting standard and fast-mode-plus I²C clock rates. Use Value: Enables single-chip I²C voltage translation at 1.2Mbps with no external resistors - simplifies layout and improves noise immunity vs. discrete solutions. |
| SD Card Interface Translation | Hot-Swappable Module Communication |
Use Scenario: Translating 1.8V SDIO command/data lines from an SoC to a 3.3V SD card slot in a tablet. IC Role / Device Role / Timing Role: 8-bit bidirectional translator handling CMD, CLK, DAT0–DAT3 with simultaneous direction switching. Use Value: Supports 50MHz SD clock (100Mbps data rate) with <9ns propagation delay - meets SD 3.0 timing budgets without skew-induced errors. |
Use Scenario: Enabling hot-plug communication between a 1.8V baseboard and 5V add-on module (e.g., camera or LTE modem) in a modular handheld design. IC Role / Device Role / Timing Role: OE-controlled Hi-Z isolation prevents back-driving during insertion/removal; dual-rail supplies allow independent power sequencing. Use Value: Guarantees bus isolation during hot-swap events - avoids latch-up or data corruption without firmware intervention or external switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level-shifting applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC8T245RHLR | Direction-controlled (DIR pin required); CMOS push-pull only; no integrated pull-ups; max 320Mbps but requires external bias for open-drain emulation | Requires MCU GPIO for DIR control; unsuitable for true bidirectional buses like I²C without protocol-aware software management | Select when highest speed (>100Mbps) and deterministic unidirectional control are prioritized over simplicity in shared-bus systems |
| PCA9306DCUR | 2-bit, dual-channel; supports 1.2V–3.3V translation only; no VCCB > 3.3V support; max 2Mbps open-drain; no push-pull capability | Limited to low-speed I²C/SMBus; cannot replace TXS0108ENMER in SDIO or high-speed GPIO applications | Select only for cost-sensitive, low-pin-count I²C translation where 5V peripheral support and 8-bit width are unnecessary |
Compared with SN74AVC8T245RHLR and PCA9306DCUR, TXS0108ENMER uniquely combines directionless operation, integrated open-drain pull-ups, 5V B-port support, and 110Mbps push-pull performance in a single 8-bit device-making it optimal for compact, multi-protocol mobile interfaces where pin count, BOM simplicity, and bus autonomy are critical.
Availability
TXS0108ENMER is available at Aetrix Electronics and suitable for smartphone, tablet, and embedded handheld applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for TXS0108ENMER 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 consumer markets.
The TXS0108ENMER belongs to TI's voltage translator product line, engineered specifically for low-power, space-constrained portable electronics requiring robust, no-direction-control level shifting across mixed-voltage subsystems.
FAQ
What is the maximum supported VCCB voltage for TXS0108ENMER?
The absolute maximum VCCB rating for TXS0108ENMER is 6.5V, but the recommended operating range is 1.65V to 5.5V. Operation at 5.5V is fully characterized and supported across temperature; exceeding 5.5V voids guaranteed performance and risks reliability degradation. Always maintain VCCA ≤ VCCB per datasheet constraint.
Can TXS0108ENMER translate between 1.2V and 3.3V logic levels?
No - TXS0108ENMER does not support 1.2V on the A port. Its minimum VCCA is 1.4V, so 1.2V source logic is outside specification and may result in undefined output behavior or increased static current. For 1.2V interfaces, consider TI's TXS0206 or similar 1.1V–3.6V translators.
Is TXS0108ENMER compatible with I²C fast-mode-plus (1 Mbps)?
Yes - TXS0108ENMER supports up to 1.2Mbps in open-drain mode with integrated B-port pull-ups, fully covering I²C fast-mode-plus (1 Mbps) requirements. Its typical VOLB < 0.4V at 300μA and rise-time acceleration ensure reliable low-to-high transitions even under capacitive bus loads.
Does TXS0108ENMER require external pull-up resistors on the A port?
No - the A port has no integrated pull-ups. External pull-ups are only needed if the A-side source is open-drain (e.g., certain I²C masters). For push-pull A-side drivers, no external resistors are required. The device's internal pull-ups exist solely on the B port (RPUB) to VCCB.
What is the thermal pad connection requirement for TXS0108ENMER in ZXY package?
The ZXY (UFBGA) package of TXS0108ENMER has no exposed thermal pad. Unlike RGY or RKS VQFN variants, the ZXY package uses solder bumps only - no center pad grounding or thermal connection is required or possible. PCB layout should follow TI's ZXY land pattern guidelines for reliable reflow.
TXS0108ENMER 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:
- 8
- Voltage - VCCA:
- 1.4 V ~ 3.6 V
- Voltage - VCCB:
- 1.65 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain, Push-Pull
- Data Rate:
- 110Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-WFBGA
TXS0108ENMER FAQ
1.How can I place an order for TXS0108ENMER through Aetrix?
Please submit a Request for Quotation (RFQ) for TXS0108ENMER 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 TXS0108ENMER reliable?
The price and inventory of TXS0108ENMER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TXS0108ENMER is usually 5 days.
3.What payment methods are accepted for TXS0108ENMER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TXS0108ENMER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TXS0108ENMER?
TXS0108ENMER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TXS0108ENMER 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 TXS0108ENMER?
For technical support, including TXS0108ENMER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TXS0108ENMER requirements.
6.How does Aetrix verify that TXS0108ENMER is sourced from the original manufacturer or authorized distributors?
All TXS0108ENMER 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 TXS0108ENMER meets industry standards.
7.What is the process for return or replacement of TXS0108ENMER?
All TXS0108ENMER units undergo pre-shipment inspection (PSI). If there is an issue with TXS0108ENMER, 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 TXS0108ENMER part is unused and in its original packaging.
Return procedure for TXS0108ENMER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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