Auto Directional level shifter families are designed with weaker outputs than devices from other level shifting families, to be easily overdriven by the hosts. This makes Auto Direction devices a requirement for bidirectional interfaces such as I²C, MDIO, Quad-SPI, and so on.

The TXS and TXB Auto Directional level shifter families as shown in Voltage Translators and Level Shifters are designed with edge rate accelerators (commonly known as one-shots). The one-shots are designed for a set duration of pulse width for optimal signal integrity, impacted by RC components. Therefore, intentional and careful considerations should be made when used with additional external components as majority of one-shot concerns are due to improper use of the devices, false triggering of the one-shots and poor layout design.