Basic Product Information
Part Number: TXB0108PWR
| Field |
Value |
| Manufacturer |
Texas Instruments |
| Device Type |
TXB0108PWR – 8-Bit Bidirectional Voltage-Level Translator |
| Package |
TSSOP-20 (PW) |
| Compliance |
RoHS Compliant, REACH Compliant |
| Grade |
Catalog (Industrial) |
Core Electrical Parameters
| Parameter |
Value |
Unit |
| A Port Supply Voltage (VCCA) |
1.2 – 3.6 |
V |
| B Port Supply Voltage (VCCB) |
1.65 – 5.5 |
V |
| Number of Channels |
8 |
bits |
| Maximum Data Rate |
100 |
Mbps |
| Propagation Delay |
4 (typ) |
ns |
| Supply Current (ICC max) |
4 |
µA |
| Output Drive Current |
±50 |
mA |
| ESD Protection (B Port HBM) |
±15 |
kV |
| Operating Temperature Range |
-40 to +85 |
°C |
| Direction Control |
Auto-direction sensing |
— |
Core Features & Advantages
The TXB0108PWR delivers seamless bidirectional voltage translation between mixed-voltage domains with automatic direction sensing, eliminating the need for external direction control signals.
- Primary Function: 8-bit bidirectional voltage-level translator with auto-direction sensing for interfacing processors with different I/O voltage rails.
- Advantages:
- Auto-Direction Sensing: No DIR pin required — the device automatically detects the driving side, simplifying PCB layout and reducing pin count on the MCU/FPGA side.
- Wide Voltage Translation Range: Supports universal translation between 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5V nodes, covering virtually all modern logic voltage domains.
- VCC Isolation & Ioff Support: If either supply rail is grounded, all outputs enter high-impedance state — enabling safe partial-power-down operation and live insertion without backflow damage.
Typical Application Scenarios
- Industry: Consumer Electronics / Industrial / IoT
- Equipment: Smartphones, tablets, embedded MCU boards, FPGA development platforms
- Use Cases:
- Translating 1.8V MCU GPIO to 3.3V peripheral I/O (SPI, UART, I2S) without additional direction logic.
- Interfacing a 3.3V FPGA bank with 5V legacy TTL logic devices in industrial control systems.
- Level-shifting JTAG/SWD debug signals between a 1.2V core domain and a 3.3V debug probe.
Market Reference Price
| Market |
Price Range |
Currency |
| Huaqiangbei Spot |
$0.40 – $0.80 |
USD |
| Overseas B2B |
$0.76 – $1.70 |
USD |
Related Models Comparison
| Model |
Difference |
Application |
| TXB0104PWR |
4-bit version, same TSSOP-14 package |
Narrower bus level translation (SPI-only) |
| TXS0108E |
Open-drain capable with pull-up resistors, auto-direction |
I2C/SMBus bidirectional translation |
| SN74AVC4T774 |
4-channel with dedicated DIR pin, dual-supply |
Controlled-direction translation for register-mapped interfaces |
