Work-In-Progress: Design being tested. A second revision will be needed as the QSFP Cage Mounting pads are incorrect.
QSFP to U.FL/UMCC Connector breakout.
Additional I2C circuitry is due to this being a stepping stone project for an OpenCAPI to dual QSFP design. OpenCAPI has only a single I2C interface.
All differential signals are length-matched to within 1mm of a 25mm total length, both inter-pair and intra-pair.
4-Layer PCB stackup taken from JLCPCB.
100-ohm Differential Impedance parameters were calculated using the DigiKey Online Calculator.
