100GBASE-SR4 with Limited or No FEC QSFP28 Optical Transceiver

F-tone Networks’s QSFP-SR4-Limited 100G QSFP28 transceiver modules are designed for use in 100 Gigabit Ethernet links over multimode fiber. They are compliant with the QSFP28 MSA. They are capable of operating (a) without forward error correction (FEC) provided by the host, (b) with reduced Firecode 74 FEC present per IEEE 802.3by2 25GBASE-SR and Clause 74, or (c) with full RS FEC present per IEEE 802.3bm3 100GBASE-SR4, Clause 91, and CAUI-4. Digital diagnostics functions are available via the I2C interface, as specified by the QSFP28 MSA and F-tone Networks Application Note "http://www.f-tone.com/qsfp28-reference.html". The optical transceiver is compliant per the RoHS Directive 2010. See F-tone Networks Application Note "http://www.f-tone.com/qsfp28-reference.html" for more details.

Key Features

• Hot-pluggable QSFP28 form factor
• Supports 103.1Gb/s aggregate bit rate
• Supports operation without host FEC for lowest latency and minimal host power dissipation
• Maximum link length of 30m on OM3 and 40m on OM4 without host FEC
• Maximum link length of 50m on OM3 and 70m on OM4 with host Clause 74 (Firecode) FEC
• Maximum link length of 70m on OM3 and 100m on OM4 with host Clause 91 (RS) FEC
• Power dissipation <3.5W
• Commercial case temperature range of 0°C to 70°C
• Single 3.3V power supply
• 4x25Gb/s 850nm VCSEL-based transmitter
• 4x25G electrical interface
• Single MPO12 receptacle
• RoHS-6 compliant
• I2C management interface

Applications

• 4x25GBASE-SR 25G or 100GBASE-SR4 100G Ethernet without host FEC
• 4x25GBASE-SR 25G or 100GBASE-SR4 Ethernet with Firecode host FEC
• 100GBASE-SR4 100G Ethernet with RS host FEC
• InfiniBand EDR

Specifications

Important Notice

Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by F-tone Networksbefore they become applicable to any particular order or contract. In accordance with the F-tone Networks policy of continuous improvement specifications may change without notice.

The publication of information in this data sheet does not imply freedom from patent or other protective rights of F-tone Networks or others. Further details are available from any F-tone Networks sales representative.