Devices with one-shots (such as TXB) are sensitive to reflections
To reduce reflections, use shorter connectors/ design with shorter PCB traces.
Properly design for appropriate impedance matching, dependent on the system's transmission
line.
TXB0304 can be mistaken as a weaker device (than TXB0104 or competitor devices).
This is due to TXB0304's stronger output impedance with a faster rise/fall time.
Such faster transition times are more sensitive to transmission line effects.
As an example, Section 3 shows
TXB0304 with stronger transient drive strength - rise time < 1.3ns (with
overshoot) and TXB0104 rise time up to 3.7ns with little to no overshoot.
Design Considerations:
Design with minimum PCB traces/connectors to reduce likelihood of transmission line effects
Section 3 shows the
TXB0104 and TXB0304 both used with a 50 Ω transmission line
0Ω series resistors can be populated at the outputs of TXB-Type Devices and swapped out later for dampening purposes
Appropriate impedance matching is recommended
TXB0104 (with a 1.8 V output impedance- 70 Ω ) matched closer to the 50 Ω transmission line then the TXB0304 with 5 Ω
The device with more impedance mismatch yielded more reflections