25GE Low Latency SR SFP28 Optical Transceiver FTLF8538P4BCL SFP28 optical transceivers are designed for use in 25 Gb/s data rate over multimode fiber. They are compliant to IEEE802.3by, SFF-8472 Rev 12.2 and SFF-8402, and compatible with SFF-8432 and applicable portions of SFF-8431 Rev. 4.1. The optical transceiver is RoHS compliant as described in Application Note AN-2038.