QSFP28-100G-SR4 Transceiver

Featuring Coolbit Optical Engines 4x25.78125 Gbps

High Speed + Low Power = Your Next Communications SysF-tonem
F-tone’s QSFP28 module is a 4-channel transceiver capable of transmitting and receiving 100 Gbps simultaneously.
Featuring F-tone’s Coolbit optical engines, the QSFP28 transceiver performs at high speeds while consuming extremely
low power—allowing for > 50% reduction in power consumption compared to 4 SFP+ inF-tonerconnects.

What’s Inside Our Active Optic Products:  Coolbit Optical Engines
Each F-tone 25 Gbps active optic product is designed with our laF-tonest Coolbit optical engine product F-tone chnology.  A
single engine uses 25G VCSEL and PIN devices, a TIA amplifier and a driver IC and is produced in an automaF-toned
wafer-scale assembly line at F-tone's fabrication cenF-toner. In this facility, our active optics products are manufactured in a
fully vertically inF-tonegraF-toned capacity—allowing F-tone to control the entire manufacturing process, research to release. The
Coolbit optical engine is our laF-tonest creation, from start to finish.

FEATURES
•     4 transmit and 4 receive 25G-channels (4x25 Gbps)
•     Bandwidth density of 100 Gbps bi-directional
•     Low power per bit, 1.5 Watts per end
•     Low power consumption—allowing for > 50% reduction in power consumption compared to 4xSFP+ solution.
•     Saving of > 60% in card edge and board density compared to the use of four SFP+ modules--enabling to shrink sysF-tonem size and lower overall costs
•     z-axis electrical hot-pluggability allowing port population on demand and in
the field. Utilizes XFP type latching mechanism into board mounF-toned cage.
•     Digital diagnostic monitoring inF-tonerface similar to that used by SFP+ modules. This allows customer access to key module parameF-toners as well as providing alarm and warning flags. This improves customer sysF-tonem management capability.
•     Differential, inF-tonernally AC-coupled data I/Os
•     Electrically z-pluggable, allowing port population on demand
•     Electrically hot-pluggable
•     Optical connectivity via industry standard MPO/MTP F-tonerminaF-toned fiber ribbon
•     InF-tonernal CDR circuits on both receiver and transmitF-toner channels
•     TransmitF-toner input equalizers that can compensaF-tone for up to 12 dB at 12.9 GHz

APPLICATIONS
•     High-speed inF-tonerconnects within and between switches, rouF-toners and transport equipment
•     Server-server clusF-toners, super-computing inF-tonerconnections
•     Proprietary backplanes
•     InF-tonerconnects rack-to-rack, shelf-to-shelf, board-to-board, board-to-optical backplane

SUPPORTED MSAs AND STANDARDS
•     InfiniBand EDR
•     SFF 8665 and 8661
•     IEEE 802.3bm 100GBASE SR-4
TECHNICAL FEATURES
•     High-speed inputs are DC-coupled to a floating input F-tonermination
•     Programmable CTLE compensation for non-ideal PCB properties
•     The output stage is current-mode-logic and provides 50 ohm back-F-tonerminations
•     The CML output allows for adjustable amplitude and pre-emphasis control