TXS0108ERGYR - 8-Bit Bidirectional Level Shifter | Texas Instruments
MPN: TXS0108ERGYR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.75 | $7.50 |
| 100 | $0.6 | $60.00 |
| 500 | $0.55 | $275.00 |
| 1,000 | $0.53 | $530.00 |
Drop-in alternatives for TXS0108ERGYR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TXS0108ENMER
β Drop-Inπ Reference alternative (not in catalog)
TXS0104ERGYR
β Drop-Inπ Reference alternative (not in catalog)
TXS0108ERGYR Maximum Ratings & Electrical Characteristics
| Number of Channels | 8 |
| VCCA Range | 1.4 V to 3.6 V |
| VCCB Range | 1.65 V to 5.5 V |
| Maximum Data Rate (Push-Pull) | 110 Mbps |
| Maximum Data Rate (Open-Drain) | 1.2 Mbps |
| Direction Control | None (auto-direction) |
| VCC Isolation | Yes (high-impedance outputs if either VCC at GND) |
| Power Sequencing | Not required (either VCCA or VCCB can be ramped first) |
| Capacitive Load | 70 pF (max) |
| Operating Temperature Range | -40Β°C to 85Β°C |
| Package | VQFN (RGY) 20-pin, 3.5x4.5 mm |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Supply Voltage (VCCA) | 1.4 V to 3.6 V |
| Supply Voltage (VCCB) | 1.65 V to 5.5 V |
TXS0108ERGYR Pin Configuration
| Pin 1 | VCCA β A-port supply voltage (1.4V to 3.6V) |
| Pin 2 | A1 β Bidirectional I/O A1 |
| Pin 3 | A2 β Bidirectional I/O A2 |
| Pin 4 | A3 β Bidirectional I/O A3 |
| Pin 5 | A4 β Bidirectional I/O A4 |
| Pin 6 | A5 β Bidirectional I/O A5 |
| Pin 7 | A6 β Bidirectional I/O A6 |
| Pin 8 | A7 β Bidirectional I/O A7 |
| Pin 9 | A8 β Bidirectional I/O A8 |
| Pin 10 | GND β Ground |
| Pin 11 | B8 β Bidirectional I/O B8 |
| Pin 12 | B7 β Bidirectional I/O B7 |
| Pin 13 | B6 β Bidirectional I/O B6 |
| Pin 14 | B5 β Bidirectional I/O B5 |
| Pin 15 | B4 β Bidirectional I/O B4 |
| Pin 16 | B3 β Bidirectional I/O B3 |
| Pin 17 | B2 β Bidirectional I/O B2 |
| Pin 18 | B1 β Bidirectional I/O B1 |
| Pin 19 | VCCB β B-port supply voltage (1.65V to 5.5V) |
| Pin 20 | NC β No connect |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TXS0108ERGYR is suitable for 6 applications: I2C Bus Level Shifting, SPI Communication Interface, UART Connection, SD Card Interface, SIM Card Reader, GPIO Level Translation.
I2C Bus Level Shifting
The TXS0108ERGYR is ideal for I2C bus level shifting between 1.8V/2.5V/3.3V microcontrollers and 5V peripherals. Its open-drain support at 1.2 Mbps handles standard and fast-mode I2C. The auto-direction sensing eliminates the need for direction control, simplifying the interface. External pull-up resistors are required on both sides, and the VCC isolation feature ensures high-impedance outputs when either supply is off, preventing bus contention during power sequencing.
Recommended
SPI Communication Interface
For SPI communication between a 3.3V MCU and 5V peripherals, the TXS0108ERGYR provides 110 Mbps push-pull data rates, sufficient for high-speed SPI clocks. The bidirectional channels handle MOSI, MISO, SCK, and CS lines without direction control. The one-shot accelerator ensures fast edge rates, minimizing signal distortion. Place decoupling capacitors near VCCA and VCCB to maintain signal integrity at high speeds.
Recommended
UART Connection
The TXS0108ERGYR is well-suited for UART connections between low-voltage logic and 5V legacy devices. Its bidirectional capability handles TX and RX lines, and the auto-direction sensing works seamlessly with UART's half-duplex or full-duplex operation. The 110 Mbps push-pull rate far exceeds UART's typical baud rates, ensuring reliable data transfer. The VQFN package's small footprint is ideal for compact designs.
Recommended
SD Card Interface
The TXS0108ERGYR is commonly used in SD card interfaces to translate between 3.3V microcontrollers and 1.8V SD cards. It supports the push-pull signaling required for SDIO, with data rates up to 110 Mbps, covering high-speed SD modes. The 8 channels accommodate the 4-bit data bus, clock, and command lines. The VCC isolation feature protects the card when the host is powered down.
Recommended
SIM Card Reader
In SIM card readers, the TXS0108ERGYR translates between the 1.8V/3.3V SIM card and the host processor's I/O voltage. Its bidirectional channels handle the reset, clock, and data lines. The open-drain support is useful for the data line, which uses open-drain signaling in some SIM interfaces. The device's low quiescent current is beneficial for battery-powered readers.
Recommended
GPIO Level Translation
The TXS0108ERGYR is perfect for general-purpose GPIO level translation in mixed-voltage systems. It allows a 1.8V or 2.5V FPGA to interface with 3.3V or 5V peripherals. The 8 channels provide ample I/O for multiple signals. The auto-direction sensing simplifies firmware, as no GPIO direction control is needed. The VQFN package's small size is ideal for dense PCB layouts.
Recommended
Recommended Products Summary
Engineering reference data for TXS0108ERGYR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TXS0108EPWR | TXS0108ENMER | TXS0104ERGYR |
|---|---|---|---|---|
| Package | VQFN-20 (RGY) | TSSOP-20 | VQFN-20 (RGY) | VQFN-20 (RGY) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 8 | 8 | 8 | 4 |
| VCCA Range | 1.4V to 3.6V | 1.4V to 3.6V | 1.4V to 3.6V | 1.4V to 3.6V |
| VCCB Range | 1.65V to 5.5V | 1.65V to 5.5V | 1.65V to 5.5V | 1.65V to 5.5V |
| Max Data Rate (Push-Pull) | 110 Mbps | 110 Mbps | 110 Mbps | 110 Mbps |
| Max Data Rate (Open-Drain) | 1.2 Mbps | 1.2 Mbps | 1.2 Mbps | 1.2 Mbps |
| Direction Control | None (auto-direction) | None (auto-direction) | None (auto-direction) | None (auto-direction) |
Key Differentiators
- No direction-control signal needed (vs TXB0108PWR)
- Supports open-drain applications (vs TXB0108PWR)
- VCC isolation feature (vs LSF0108PWR)
Design Notes
Ensure VCCA β€ VCCB at all times. The TXS0108E requires VCCA to be less than or equal to VCCB for proper operation. If VCCA exceeds VCCB, the device may not function correctly and could be damaged. Use separate LDOs or regulators to maintain the correct voltage relationship.
Place 0.1Β΅F and 10Β΅F decoupling capacitors close to the VCCA and VCCB pins. These capacitors stabilize the supply rails and reduce noise. For high-speed push-pull signals, keep traces short and use ground planes to minimize inductance and crosstalk.
For open-drain applications, external pull-up resistors are required on both A and B sides. The value depends on the bus capacitance and speed; typical values range from 1kΞ© to 10kΞ©. Do not omit these resistors, as the TXS0108E does not have internal pull-ups.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified. Halogen-free status not specified in provided data.
