8 Channel Level Converter 1.8V-3.3V-5V-12V better than TXS0108E

This 8 Channel Level Converter is fully bidirectional and a drop-in replacement for standard TXS0108E modules, offering significantly improved reliability for real-world applications. While TXS0108E-based boards rely on internal edge accelerators and weak pull-ups, this design uses discrete BSS138G MOSFETs with external 10k pull-up resistors - the proven and preferred solution for stable level shifting.

The result is a converter that behaves exactly as expected, even in demanding setups such as I2C buses, mixed-voltage GPIO, or long wire connections. No unpredictable switching, no oscillation issues, and no compatibility problems with “difficult” devices like you know from solutions based on TXS0108E.

Each of the 8 channels is fully bidirectional and independent, allowing seamless level translation between logic domains such as 1.8V, 3.3V, 5V, and even up to 12V systems.

Unlike TXS0108E modules (which are optimized for high-speed push-pull signals but can struggle with bus capacitance or strong pull-ups), this MOSFET-based 8 Channel Level Converter design is optimized for robust, real-world interfacing, especially for open-drain protocols like I2C.

This makes it the ideal choice for engineers, makers, and professionals who need predictable behavior instead of “sometimes works” results.

Technical Specifications

• Channels: 8 independent bidirectional channels
• Level shifting method: Discrete MOSFET (BSS138G)
• Voltage range (low side): 1.8V – 5V (typical)
• Voltage range (high side): up to 12V
• MOSFET type: BSS138G (low threshold, fast switching)
• Pull-up resistors: 10kΩ (external, per channel)
• Logic type: Open-drain / push-pull compatible
• Direction control: Automatic (no control pin required)
• Typical applications: I2C, UART, SPI (low–moderate speed), GPIO
• Connector pitch: 2.54mm (standard header compatible)
• Form factor: TXS0108E-compatible footprint and pinout
• Power requirement: Dual supply (LV and HV domains)
• Ground: Common ground required
• Dimensions: 25.4 x 15.2mm
• Raw distance: 12.7mm