Any logic device can experience transmission line effects such as ringing or oscillations when the driver is outputting a signal into a conductor medium due to the influence of the inductive and capacitive elements along the signaling path.

While higher data rate signals contain faster rise or fall times overall, the rise or fall time characteristics are more critical to transmission line effects. Simply because two signals are toggling at the same data rate with different rise or fall times, as shown in Figure 3-2, does not imply that the frequency content is the same. The faster rise or fall signal yields a shorter wavelength and thus contains higher frequency content- making the rise or fall time more susceptible to transmission line effects.

By the same principle, the TXB0304 having faster rise or fall edges than the TXB0104 results in the TXB0304 being especially prone to transmission line effects at shorter traces.