AN 555: True Differential Signaling Termination and Biasing for Agilex™ 7 M-Series, Agilex™ 5, and Agilex™ 3 FPGAs - Describes termination and biasing schemes for True Differential Signaling (TDS) I/O standard transmitters and receivers for Agilex 7 M-Series, Agilex 5 , and Agilex 3 FPGAs. The document describes the DC and AC coupling configurations between TDS and LVDS, RSDS, mini-LVDS, and LVPECL differential signaling I/O standards. - 2026-03-12