TXS0108EPWR - 8-Bit Bidirectional Level Shifter | TI
MPN: TXS0108EPWR ✓ 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 TXS0108EPWR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TXS0108EPWRG4
✅ Drop-In📋 Reference alternative (not in catalog)
SN74LVC8T245PWR
✅ Drop-In✓ In Stock
$0.6 / Unit
View Datasheet →TXB0108PWR
✅ Drop-In✓ In Stock
$0.62 / Unit
View Datasheet →SN74AVC4T245PWR
✅ Drop-In✓ In Stock
$0.78 / Unit
View Datasheet →TXS0108EPWR Maximum Ratings & Electrical Characteristics
| Number of Channels | 8 |
| Direction | Bidirectional |
| VCCA Range | 1.2 V to 3.6 V |
| VCCB Range | 1.65 V to 5.5 V |
| Data Rate (Push-Pull) | 60 Mbps |
| Data Rate (Open-Drain) | 2 Mbps |
| Quiescent Current | 620 µA |
| Propagation Delay | 4.8 ns |
| Operating Temperature | -40°C to +85°C |
| Package | TSSOP-20 (PW) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (260°C unlimited) |
| RoHS Status | Compliant |
| VCC Isolation | Yes (if either VCC at GND, outputs high-impedance) |
| Auto Direction Sensing | Yes |
TXS0108EPWR Pin Configuration
| Pin 1 | VCCA — A-port supply voltage (1.2V to 3.6V) |
| Pin 2 | A1 — A-port I/O channel 1 |
| Pin 3 | A2 — A-port I/O channel 2 |
| Pin 4 | A3 — A-port I/O channel 3 |
| Pin 5 | A4 — A-port I/O channel 4 |
| Pin 6 | A5 — A-port I/O channel 5 |
| Pin 7 | A6 — A-port I/O channel 6 |
| Pin 8 | A7 — A-port I/O channel 7 |
| Pin 9 | A8 — A-port I/O channel 8 |
| Pin 10 | GND — Ground |
| Pin 11 | B8 — B-port I/O channel 8 |
| Pin 12 | B7 — B-port I/O channel 7 |
| Pin 13 | B6 — B-port I/O channel 6 |
| Pin 14 | B5 — B-port I/O channel 5 |
| Pin 15 | B4 — B-port I/O channel 4 |
| Pin 16 | B3 — B-port I/O channel 3 |
| Pin 17 | B2 — B-port I/O channel 2 |
| Pin 18 | B1 — B-port I/O channel 1 |
| Pin 19 | VCCB — B-port supply voltage (1.65V to 5.5V) |
| Pin 20 | OE — Output enable (active low) |
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
TXS0108EPWR is suitable for 6 applications: I2C Bus Level Shifting, SPI Interface Translation, UART Level Conversion, SD Card Interface, Industrial Sensor Interfacing, Consumer Electronics.
I2C Bus Level Shifting
The TXS0108EPWR is ideal for I2C bus level shifting between different voltage domains, such as 1.8V and 3.3V. It supports open-drain signals with data rates up to 2 Mbps, which exceeds standard I2C speeds. The auto-direction sensing simplifies design, and the VCC isolation feature ensures safe power-down. Place pull-up resistors on both sides as required by I2C spec.
Recommended
SPI Interface Translation
For SPI interfaces, the TXS0108EPWR can translate signals between a 3.3V microcontroller and a 5V peripheral, supporting data rates up to 60 Mbps. It handles push-pull signals with minimal propagation delay (4.8 ns), ensuring high-speed communication. The device's 8 channels can accommodate SPI signals plus additional control lines, making it a versatile solution for mixed-voltage systems.
Recommended
UART Level Conversion
The TXS0108EPWR is well-suited for UART level conversion between 1.8V and 3.3V or 5V logic. It supports bidirectional communication without a direction pin, simplifying the interface. The device's low quiescent current (620 µA) is beneficial for battery-powered devices. Ensure that the UART signals are push-pull for maximum data rate; for open-drain, use pull-ups.
Recommended
SD Card Interface
The TXS0108EPWR can interface a 3.3V SD card with a 1.8V host controller, translating data, command, and clock lines. It supports the high-speed SDIO interface with data rates up to 60 Mbps. The 8 channels cover the 6 SD card signals plus extra GPIOs. The VCC isolation feature prevents back-powering when the host is off, protecting the SD card.
Recommended
Industrial Sensor Interfacing
In industrial systems, the TXS0108EPWR translates signals between a 3.3V PLC and 5V sensors or actuators. It supports both open-drain and push-pull signals, making it compatible with various sensor outputs. The wide operating temperature range (-40°C to +85°C) suits harsh environments. The device's robustness and VCC isolation enhance system reliability.
Recommended
Consumer Electronics
The TXS0108EPWR is used in consumer electronics like smartphones and tablets to interface between application processors (1.8V) and peripherals (3.3V) such as touch controllers, sensors, and memory cards. Its small TSSOP-20 package saves board space, and the auto-direction sensing reduces firmware complexity. The device supports high-speed data rates for multimedia applications.
Recommended
Recommended Products Summary
Engineering reference data for TXS0108EPWR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TXS0108ERGYR | TXS0108EPWRG4 | SN74LVC8T245PWR | TXB0108PWR |
|---|---|---|---|---|---|
| Package | TSSOP-20 (PW) | VQFN-20 (RGY) | TSSOP-20 (PW) | TSSOP-20 (PW) | TSSOP-20 (PW) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 8 | 8 | 8 | 8 | 8 |
| Direction Control | Auto | Auto | Auto | DIR pin | Auto |
| Open-Drain Support | Yes | Yes | Yes | No | No |
| Max Data Rate (Push-Pull) | 60 Mbps | 60 Mbps | 60 Mbps | 420 Mbps | 100 Mbps |
| VCCA Range | 1.2V to 3.6V | 1.2V to 3.6V | 1.2V to 3.6V | 1.65V to 5.5V | 1.2V 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 | 1.65V to 5.5V |
Key Differentiators
- Supports both open-drain and push-pull applications (vs TXB0108PWR)
- Automatic direction sensing (vs SN74LVC8T245PWR)
- VCC isolation feature (vs TXB0108PWR)
Design Notes
Ensure both VCCA and VCCB are powered within their specified ranges. The VCC isolation feature requires that if either supply is at GND, all outputs are high-impedance. Use 0.1µF decoupling capacitors close to each supply pin to minimize noise and ensure stable operation.
Place the TXS0108EPWR close to the voltage boundary to minimize trace lengths. For high-speed signals (up to 60 Mbps), maintain controlled impedance and keep traces short. Use ground planes to reduce noise and crosstalk. Refer to TI's layout guidelines in the datasheet for optimal performance.
Do not exceed the absolute maximum ratings for VCCA and VCCB. For open-drain applications, external pull-up resistors are required on both sides. Ensure the OE pin is properly driven; when OE is high, outputs are disabled. Avoid floating inputs by tying unused channels to a defined logic level.
Compliance Information
RoHS compliant per TI product page. MSL level 1. Not AEC-Q100 qualified.
