SATA signal redriver — what it does on the board
The Texas Instruments SN75LVPE802RTJR is a 2-channel redriver (buffer) designed to extend the reach of high-speed serial signals on a PCB or cable assembly. It accepts a CML input and delivers a VML output, applying input equalization and output de-emphasis to compensate for channel loss — the kind of loss you get from long traces, connectors, or cable runs in a SATA link. Supply range is 3 V to 3.6 V, drawing 57 mA typical. The 20-pin WFQFN with exposed pad (4x4 mm) requires a solid thermal via pattern under the pad for heat sinking — no airflow over the part in a sealed enclosure means the pad is your only thermal path. Operating temperature is 0°C to 85°C, so this is a commercial/industrial ambient part — fine for desktop storage, NAS enclosures, or rack servers, but not rated for under-hood automotive or extended outdoor use.
Sourcing and lifecycle — active, no LTB pressure
ROHS3 compliant, lead-free. If your BOM calls for the RTJ (tray) variant, confirm the suffix match — the die and performance are identical, but the shipping medium differs.
Board integration notes
Input is AC-coupled CML; the redriver handles the equalization internally. Output de-emphasis level is fixed per TI's configuration — no external programming pins, so verify the equalization profile matches your channel loss budget by reviewing the TI application note for this part.