32 Gbps redriver — what the scorch mark tells you
The TI DS320PR822NJXT is an eight-channel PCIe 5.0 ReDriver that handles differential input and output at a maximum data rate of 32 Gbps. It's the part you find on a dead server backplane when the link training fails on Gen 5 lanes — the input equalisation stage is the first thing to check with a scope. The 4 x 2:2 crosspoint means four upstream lanes can be fanned out to two downstream ports each, common in PCIe bifurcation or M.2 slot redrives.
1.6 pF input capacitance — why it matters at 32 Gbps
Input capacitance sits at 1.6 pF, low enough that it doesn't collapse the upstream transmitter's eye opening at 32 Gbps. If you're swapping in a redriver from a different family and the eye margin drops, this capacitance figure is the first suspect — a 2 pF part will close the mask on a marginal layout. The 0.1 ns propagation delay keeps the lane-to-lane skew tight enough for PCIe Gen 5 timing budgets.
Active production — no last-time-buy scramble
The DS320PR822NJXT carries an active lifecycle status, so there's no NRND or EOL flag to worry about for new designs. For volume procurement, it's quoted to order through independent distribution; current pricing and lead time are confirmed at quote time.
Package and supply rail — layout checklist
Housed in a 64-WFQFN exposed-pad package (5.5 x 10 mm body), surface-mount only. Supply range is 3 V to 3.6 V — a clean 3.3 V rail with adequate decoupling at the exposed pad is the rule. Operating temperature covers -40°C to 85°C, so it's fine for telecom cabinets and industrial backplanes, not just climate-controlled data centres.