A high-speed DAC cable is a fixed component supporting high-speed data transmission that uses a small connector module as an optical transceiver on one end of the cable. With cost advantages and energy-saving advantages, it is widely used in data centers for short-distance application. The high-speed cable DAC have different encapsulation and rates: 10G SFP+ DAC, 25G SFP28 DAC, 40G|56G QSFP+ DAC, 100G QSFP28 DAC, 200G QSFP56 DAC, etc. In this blog, Unitekfiber will introduce 56G QSFP+ DAC passive high-speed cables.
Before officially introducing the 56G QSFP+ DAC passive high-speed cable, let’s take a look at the QSFP+ DAC high-speed cable. The QSFP+ DAC high-speed cable are divided into two types: active and passive. Among them, passive QSFP+ DAC high-speed cable do not have a driver chip, so they can transmit signals without power drive. And in the process of transmission, the signal will not be adjusted such as amplification or equalization. Generally speaking, the maximum transmission distance of a passive QSFP+ DAC high-speed cable is 7 meters, while the active QSFP+ DAC high-speed cable has a driver chip that can perform signal conditioning, so its transmission distance is slightly longer, about 10 meters or even Longer. It mainly divided into four categories: 40G QSFP+ DAC active high-speed cable, 40G QSFP+ DAC passive high-speed cable, 40G QSFP+ to 4x10G SFP+DAC passive high-speed cable and 56G QSFP+ DAC passive high-speed cable.
56G QSFP+ DAC passive high-speed cable is a high-speed twinaxial cable with QSFP+ connectors at both ends. It mainly uses silver-plated conductors, insulated core wires of physically foamed polyolefin materials, and wire pair shielding or total shielding. The normal length of the copper cable is 1-7 meters, and the copper cable gauge (refer to the copper cable diameter) is available from 30 to 24 AWG. The larger the wire gauge, the higher the grade of the wire passing through the hole, and the smaller the diameter of the wire. Therefore, the longer the DAC high-speed cable, the smaller the wire gauge, which can effectively reduce the loss during signal transmission. Each channel can transmit data at a rate of up to 14.3125Gb/s, support a total of 56Gb/s aggregate rate, transmission distance up to 7 meters, support commercial-grade operating temperature 0-70 degrees Celsius, 3.3V operating voltage, comply with SFF-8436 and ROHS specification.
56G QSFP+ DAC passive high-speed cables are used in 56G InfiniBand SDR/DDR/QDR and FDR interconnection, HPC interconnection, and are cost-effective and low-loss copper cable solutions in 56G network application scenarios. The above is the whole content of this issue of Unitekfiber introducing 56G QSFP+ DAC passive high-speed cable.
