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Hitachi Cable America

Copper Direct Attach Cable Assemblies

Direct Attach Cables

The Hitachi Cable America/Hitachi Metals Direct Attach Cable assemblies based on the OMNIBITĀ® cable design will be discontinued as a product family at the end of 2018. This catalog will remain available for access during the 'end of life' transition to help customers with product specifications and part number identification.

Regardless of the industry, the location, whether it is a data center or call center, com- mercial or industrial, it is an indisputable fact that bandwidth and data storage needs are always increasing. To satisfy our never ending hunger for more data and quicker access to it, technology manufacturers must constantly develop and release newer, faster tech- nologies. One popular and proven technology is Direct Attach Cables. Direct Attach Cables offer pre-terminated connection solutions for 25Gbit/s, 50Gbit/s and 100 Gbit/s. Utilizing the same port as an optical transceiver, the copper based DAC is a more cost effective solution for short run applications, up to 5 meters, than fiber since it does not require power for signal conversion from electrons to photons. Read More.

Direct Attach Cable AssembliesWith the convenience of plug and play technology, Hitachi’s family of Direct Attach Cables (DAC) delivers throughput that exceeds those of industry standards. Hitachi’s patented OMNIBIT ® high-performance twin-axial (twinax) cable designs offer improved performance over the competition. Hitachi’s leading edge OMNIBIT ® high-speed copper cable assem- blies meet the highest performance levels (QSFP28 & SFP28) and are cost effective I/O solutions supporting Ethernet and InfiniBand applications. Hitachi’s OMNIBIT ® Technology for QSFP28 and SFP28 Direct Attach Copper cable assemblies provide a high-density, high-bandwidth solution with broadly recognized Hitachi performance and reliability. Hita- chi’s OMNIBIT ® high speed cable assemblies exceed industry standards for performance and reliability as per SFF-8436 & IEEE 802.3bj at speeds up to 28Gbps per channel.

SFP28 and QSFP28 Defined

DAC CableSFP28 (Small Form Pluggable) is a title applied to both a network connector and a network port. SFP28 is a type of link utilized for both fiber cables, and copperbased Direct Attach Cables (DACs). As a connector, SFP28 defines a type of enhanced hot-swappable connector designed to support switch and server data rates of 25 Gbit/s Ethernet. It contains 20 pins. It is backwards compatible with all SFP ports.

Intended for short runs (up to 5 meters), Hitachi’s copper DACs featuring SFP28 connectors can each support single channels with data rates up to 25 Gbit/s. Integrating multiple SFP28 connectors with a single QSFP28 connector can enable support of up to 100 Gbit/s per cable assembly (4 x 25G channels). This 1x4 configuration is advantageous since four 10/25G servers can be consolidated onto one 40/100G switch.

DAC CablesQSFP28 (Quad Small Form Pluggable), like SFP28 refers to both a plug and port. As the name implies, it can accommodate 4x the SFP28 data rate through the utilization of 4 distinct data channels. The connector is slightly larger than an SFP28 connector. It contains 38 pins with 4 high-speed TX pairs and 4 high-speed RX pairs. Like the SFP28 connector, it can be utilized for both fiber cables, and copper-based DACs. Hitachi’s copper DACs featuring QSFP28 connectors are rate and protocol agnostic and support data rates of 25, 50 and 100 Gbit/s Ethernet as well as InfiniBand EDR.

Future applications for DAC include QSFP-DD and OSFP. Contact us regarding qualification status and production release date.

Applications for DACs

Direct Attach Cables are ideal for high density, high speed I/O data center applications in the networking, telecom and data storage markets where maximum overall network efficiency and lower overall cost are desired.

For Information about Hitachi DAC products, contact Joseph Iamartino, Joe.Iamartino.bw@hca.hitachi-cable.com (603) 657-6205