Some of the TI translators have requirements during normal operation mode to have Vcca <= Vccb ( TXS/ TXB01xx) or Vrefb>= VrefA+0.8V(LSF). However, the TI translation devices do not specifically have any power sequencing requirements (power up and power down).
Usually, the datasheet’s power supply section mentions if there are any power sequencing recommendations. Note that the power sequencing can be modified according to the needs of the application/system without any performance or reliability concerns to the device.
In general, TI recommends having the ground connected before any supply is applied while the control and I/O ports are preferably at ground through weak pulldown resistors
Refer to the AXC app note which doesn’t require any power sequencing: