TXS0108ERGYR - 8-Bit Bidirectional Level Shifter | Texas Instruments
MPN: TXS0108ERGYR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.72 | $7.20 |
| 100 | $0.58 | $58.00 |
| 500 | $0.49 | $245.00 |
| 1,000 | $0.42 | $420.00 |
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‘ Same Packageπ 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) |
| Output Type | Bidirectional |
| Package | VQFN-20 (RGY) 3.5x4.5 mm |
| Operating Temperature | -40Β°C to 85Β°C |
| Supply Voltage | 2.5 V (typical) |
| Mounting Type | Surface Mount |
| Number of Pins | 20 |
| RoHS Status | Compliant |
| VCC Isolation | Yes (high-impedance if either VCC at GND) |
| Power-Supply Sequencing | Not required |
TXS0108ERGYR Pin Configuration
| Pin 1 | VCCA β A-port supply voltage (1.4V to 3.6V) |
| Pin 2 | A1 β A-port I/O channel 1 |
| Pin 3 | A2 β A-port I/O channel 2 |
| Pin 4 | A3 β A-port I/O channel 3 |
| Pin 5 | A4 β A-port I/O channel 4 |
| Pin 6 | A5 β A-port I/O channel 5 |
| Pin 7 | A6 β A-port I/O channel 6 |
| Pin 8 | A7 β A-port I/O channel 7 |
| Pin 9 | A8 β A-port I/O channel 8 |
| Pin 10 | GND β Ground |
| Pin 11 | B8 β B-port I/O channel 8 |
| Pin 12 | B7 β B-port I/O channel 7 |
| Pin 13 | B6 β B-port I/O channel 6 |
| Pin 14 | B5 β B-port I/O channel 5 |
| Pin 15 | B4 β B-port I/O channel 4 |
| Pin 16 | B3 β B-port I/O channel 3 |
| Pin 17 | B2 β B-port I/O channel 2 |
| Pin 18 | B1 β B-port I/O channel 1 |
| Pin 19 | VCCB β B-port supply voltage (1.65V to 5.5V) |
| Pin 20 | GND β Ground (exposed pad) |
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 Interface Translation, UART Level Shifting, SD Card Interface, GPIO Expansion, SIM Card Interface.
I2C Bus Level Shifting
The TXS0108ERGYR is ideal for I2C bus level shifting between 1.8V/2.5V/3.3V and 5V devices. Its open-drain support and auto-direction sensing simplify the interface, requiring only external pull-up resistors. With a 1.2Mbps open-drain data rate, it handles standard and fast-mode I2C. The VCC isolation feature ensures high-impedance outputs if one supply is off, preventing bus contention. This makes it a robust solution for multi-voltage I2C systems in sensors, EEPROMs, and microcontrollers.
Recommended
SPI Interface Translation
For SPI interfaces, the TXS0108ERGYR provides bidirectional level shifting for MOSI, MISO, SCK, and CS lines. Its 110Mbps push-pull data rate supports high-speed SPI up to 110MHz, making it suitable for SD cards, flash memory, and ADCs. The auto-direction sensing eliminates the need for a direction pin, simplifying the connection. Ensure the capacitive load on each line is within the specified limit to maintain signal integrity. This device is a reliable choice for mixed-voltage SPI systems.
Recommended
UART Level Shifting
The TXS0108ERGYR is well-suited for UART communication between low-voltage microcontrollers and 5V peripherals like GPS modules or Bluetooth modules. Its bidirectional capability handles TX and RX lines without direction control. The push-pull data rate of 110Mbps far exceeds typical UART speeds (115.2kbps), providing ample margin. The device's low quiescent current is beneficial for battery-powered applications. Use it to interface 3.3V MCUs with 5V logic in embedded systems.
Recommended
SD Card Interface
The TXS0108ERGYR is commonly used to level shift between a 3.3V microcontroller and a 1.8V SD card. It supports the push-pull signals required for SD card data lines (DAT0-DAT3, CLK, CMD) at speeds up to 110Mbps, covering SD and SDHC modes. The auto-direction feature simplifies the bidirectional data lines. The VQFN-20 package is compact, fitting well in portable devices. Ensure proper decoupling on VCCA and VCCB for stable operation.
Recommended
GPIO Expansion
The TXS0108ERGYR can be used to level shift GPIO signals between different voltage domains, enabling a 3.3V microcontroller to interface with 5V sensors, relays, or displays. Its 8 channels provide ample I/O for multiple signals. The bidirectional nature allows for both input and output translation without direction control. The device's high-impedance state when VCC is off prevents back-powering, protecting the system. This makes it a versatile solution for mixed-voltage digital systems.
Recommended
SIM Card Interface
The TXS0108ERGYR is suitable for level shifting between a 1.8V/3.3V SIM card and a microcontroller. SIM cards often operate at 1.8V or 3.3V, and the TXS0108E supports both with VCCA and VCCB ranges. The bidirectional data line (I/O) and reset lines are handled without direction control. The device's low propagation delay ensures reliable communication. Use it in cellular modules, card readers, and IoT devices requiring SIM connectivity.
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 | TXB0108PWR | LSF0108PWR |
|---|---|---|---|---|---|---|
| Package | VQFN-20 (RGY) | TSSOP-20 | VQFN-20 (RGY) | VQFN-20 (RGY) | TSSOP-20 | TSSOP-20 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 8 | 8 | 8 | 4 | 8 | 8 |
| VCCA Range | 1.4V to 3.6V | 1.4V to 3.6V | 1.4V to 3.6V | 1.4V to 3.6V | 1.2V to 3.6V | 1.0V to 4.5V |
| VCCB Range | 1.65V to 5.5V | 1.65V to 5.5V | 1.65V to 5.5V | 1.65V to 5.5V | 1.65V to 5.5V | 1.0V to 5.5V |
| Max Data Rate (Push-Pull) | 110 Mbps | 110 Mbps | 110 Mbps | 110 Mbps | 100 Mbps | 100 Mbps |
| Max Data Rate (Open-Drain) | 1.2 Mbps | 1.2 Mbps | 1.2 Mbps | 1.2 Mbps | Not supported | 1.2 Mbps |
| Direction Control | None (auto) | None (auto) | None (auto) | None (auto) | None (auto) | None (auto) |
Key Differentiators
- Supports open-drain and push-pull (vs TXB0108PWR)
- No direction control needed (vs SN74LVC8T245PWR)
- VCC isolation feature (vs LSF0108PWR)
Design Notes
Ensure VCCA β€ VCCB at all times. The TXS0108E does not require power sequencing, but if either VCC is at GND, all outputs are high-impedance. Place 0.1Β΅F and 10Β΅F decoupling capacitors close to the VCCA and VCCB pins to minimize noise and ensure stable operation.
For open-drain applications, external pull-up resistors are required on both A and B ports. Typical values range from 1kΞ© to 10kΞ© depending on speed and capacitance. Place pull-ups close to the translator to minimize trace length and reduce signal degradation.
Do not exceed the absolute maximum ratings for VCCA and VCCB. The device is not designed for level shifting above 5.5V on the B port. Also, avoid capacitive loads exceeding 70pF on the data lines, as this can reduce the maximum data rate and cause signal integrity issues.
Compliance Information
RoHS compliant per TI product page. No AEC-Q100 qualification indicated for this part.
