Typical IIN vs VIN
characteristics of the TXB0606 are shown in Figure 7-2. For proper operation, the device driving the data I/Os of the TXB0606 must have
drive strength of at least ± 3mA.
A. VT is the input
threshold voltage of the TXB0606 (typically VCCI/ 2).
B. VD is the supply voltage
of the external driver.