Coherent FTCD45xx Gen3 400GB DR4 Optical Transceiver Modules are designed for 400Gigabit Ethernet links on up to 10km of single-mode fiber. The modules offer digital diagnostic functions through the I2C interface, as specified by the QSFP28 MSA and Finisar Application Note AN-20xx5. The Coherent FTCD45xx complies with the QSFP-DD MSA, QSFP28 MSA3, IEEE 802.3cu2, and portions of IEEE P802.3bm6. The transceiver is RoHS-6 compliant per Directive 2011/65/EU4 and Finisar Application Note AN-20385.