In IVI architectures that use single-ended FSI such as head unit and digital cockpit processing, the interface can become more susceptible to ground bounce and board-to-board ground potential differences. As data rates increase, even small potential difference on ground between the source and sink boards can reduce effective noise margin, distort logic thresholds, and increase timing/jitter sensitivity at the receiver. To improve robustness, TXG1010-Q1 can be placed at the board-to-board boundary, as shown in Figure 3-9, as a tiny 2.25mm² ground-level translator that re-references the single-ended FSI signals to the local ground domain of the receiving side while also verifying compatible I/O logic levels. With VCCA/GNDA tied to the source I/O rail and VCCB/GNDB tied to the sink I/O rail, the translator helps decouple the high-speed interface from ground shifts across the interconnect, improving tolerance to ground bounce and maintaining clean logic transitions at the FSI receiver.

Figure 3-9 Block Diagram for Robust Single-Ended Interfaces using TXG1010-Q1