What this steering TVS array does for your signal lines
The Texas Instruments TPD4E001RDBVR is a steering (rail-to-rail) TVS diode array that clamps transients on four unidirectional channels. It is designed to protect high-speed data lines such as Ethernet and USB, where the 1.5pF capacitance at 10MHz keeps signal integrity intact. The 5.5V maximum reverse standoff voltage suits 5V and 3.3V logic rails, and the 17V typical clamping voltage at 5.5A peak pulse current (8/20µs waveform) provides a defined protection level.
This removes the supply-chain risk of a forced redesign.