8-channel PCIe Gen 2 redriver at 5 Gbps per lane
The DS50PCI402SQ/NOPB is an 8-channel CML buffer/reDriver from Texas Instruments, rated for a maximum data rate of 5 Gbps per lane — matching PCIe Gen 2 and earlier SATA/SAS backplane speeds. It integrates input equalisation and output de-emphasis, which compensates for board trace loss and connector reflections without adding a separate retimer or CDR. The 200 ps typical delay keeps lane-to-lane skew within a single bit period at 5 Gbps. The 10 pF input capacitance loads the upstream transmitter less than a discrete equaliser network, preserving signal integrity at the source.
Supply rail and package constraints for layout
The device operates from a 2.375 V to 2.625 V supply — a 2.5 V ±5 % rail. Housed in a 54-WFQFN with exposed pad — the supplier device package is 54-WQFN (10×5.5 mm). Surface-mount only; the 0.50 mm pitch QFN demands a solder-paste stencil with 0.25 mm apertures and a reflow profile matching the lead-free SAC305 alloy.
The NOPB suffix confirms lead-free (NiPdAu) finish; no RoHS exemption expiry to track. MOQ is typically a full reel (2500 pcs), but lower quantities can be quoted on request.