FAQ: Logic and Voltage Translation > Auto-Bidirectional Level-Shifters > Fixed DIR / DIR CNTRL Level-Shifters >> Current FAQ
Do not use auto-bidirectional level-shifters if the below is applicable. Use fixed or direction control level-shifters instead.
- Long traces with trace lengths > 1/8th of the signal's wavelength, (λ/8).
- High lumped capacitive loading, typically > 70 pF (unless otherwise noted by the datasheets).
- Input driver unable to meet datasheet's dc drive-strength requirement and input transition rate requirements.
- High-speed applications.
For more information see Do’s and Don’ts for TXB and TXS Voltage Level-Shifters with Edge Rate Accelerators.
See [FAQ] Are there voltage level translation / level shifter device recommendations for the industry standard interfaces like GPIO, SPI, UART, I2C, MDIO, RGMII, I2S etc? for specific recommendations