40GBASE-ER4 40km QSFP+ Optical Transceiver
FTL4E1QE1C QSFP+ transceiver modules are designed for use in 40 Gigabit Ethernet links over single mode fiber. They are compliant with the QSFP+ MSA and IEEE 802.3bm 40GBASE-ER4. Digital diagnostics functions are available via an I2C interface, as specified by the QSFP+ MSA. The optical transceiver is RoHS compliant as described in Application Note AN-2038.