4/9/2024 0 Comments Pcb molex sfp connector![]() In the layout example I’ll show below, I’m using a standard 20-pin SFP connector for a 25G link over fiber (up to 100 m length). Note, however, that if your connector vendor is out of stock, other connectors can be substituted into the PCB. SFP modules designed for one type of connector are not compatible with another type of connector. XFP - A 10 Gbps pluggable connector with larger form factor and 30 pins.QSFP - Same as above (and its variants), but uses four channels for much faster data rates.SFP56 - Same as SFP28 but with higher speed limit.SFP28 - Also 20 pins, but in an alternative form factor and supporting higher data rates.SFP+ - Same as SFP but supporting up to 16 Gbps.SFP - 20 pin connector supporting a variety of speeds.There are multiple types of SFP connectors that connect to transceivers with different data rates: The module includes a set of contacts along the edge that plug into the SFP connector, and the SFP connector will mount to the PCB as a standard SMD component. The connector is designed to provide a hot-swappable interface for transceiver modules like the Cisco 10G module shown below. These are generally used with fiber links in the data center, although these links are now being found elsewhere as I mentioned above. ![]() The small form factor pluggable (SFP) connector is designed to connect directly to modules that interface with copper or fiber. As I expect to see more of this going into the future, I decided to prepare this brief guide on the correct usage of SFP connectors and transceiver modules that target these very high data rates. The latter is still a bulky connector over copper, so I’m not surprised that engineers are requesting an SFP form factor for production grade systems. Streaming this much data from a small embedded device demands either a fiber transceiver or a bundled mini coax interconnect. Newer systems in sensor fusion, MIMO systems, rugged OpenVPX switches, and some industrial robotics need to stream huge amounts of data back to a workstation or server, with data streams easily exceeding 10 Gbps per lane. Today, however, I’ve had multiple design requests that involve the use of fiber transceivers outside of a data center environment. But the zCD form factor will more than double the front panel density of QSFP+ while offering 400 Gbps data rates.SFP connectors are used to route data into fiber optic transceiver modules, which are normally found in high-speed networking equipment. The zCD Interconnect System, conforming to the CDFP MSA, was conceived around the same form factors as SFP+ and QSFP+. But future data rate needs will make these connectors obsolete. SFP+ and QSFP+ form factors are popular with data center and networking OEMs due to their ability to more than double front panel density. For example, with a 0.75mm pitch and 400 Gbps per port, a 1U switch can deliver more than 5 Tbps. zCD enables the highest port and bandwidth density of any pluggable form factor currently on the market. The data center/networking industry is driving to smaller, faster and lower-cost infrastructure. The zCD Interconnect System, Style 1 delivers cutting-edge technology, transmitting 400 Gbps data rates (25 Gbps per serial lane) with excellent signal integrity (SI), electromagnetic interference (EMI) protection and thermal cooling. The rapid growth of connected devices and increasing bandwidth use require significant increases in the capacity of telecommunication networks and data center equipment connections.
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