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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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VSC8658 датащи(PDF) 12 Page - Microsemi Corporation |
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VSC8658 датащи(HTML) 12 Page - Microsemi Corporation |
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12 / 95 page  Product Overview VMDS-10242 VSC8658 Datasheet Revision 4.1 4 3 Product Overview The VSC8658 device is a low-power, octal Gigabit Ethernet transceiver with dual, fully integrated 1.25 Gbps SerDes interfaces. It is designed for use in applications, such as multiport switches and routers, where its compact ball grid array (BGA) packaging, low electromagnetic interference (EMI) line driver, and integrated line side termination resistors conserve both power and PC board space. Using the VSC8658 device in your design makes it possible to lower the component count of your PC board, sub- assembly, or device without sacrificing chip-centric capabilities or utility. This feature can make it less expensive to produce and more cost-effective to deploy. Microsemi’s mixed signal and digital signal processing (DSP) architecture—a key operational feature of the VSC8658 device—assures robust performance even under less-than-favorable environmental conditions. It supports both half-duplex and full-duplex 10BASE-T, 100BASE-TX, and 1000BASE-T communication speeds over Category 5 (Cat5) unshielded twisted pair (UTP) cable at distances greater than 140 m, displaying excellent tolerance to NEXT, FEXT, echo, and other types of ambient environment and system electronic noise. This device also supports 100BASE-FX and 1000BASE-X to connect to fiber modules, such as GBICs and SFPs. The following illustration shows a high-level, generic view of a VSC8658 application. Figure 1 • Typical Application 3.1 Features and Benefits This section lists key aspects of the VSC8658 device functionality and design that distinguish it from similar products. Table 1 • Features and Benefits Feature Benefit 650 mW per port power consumption (when configured for 1000BASE-T operation) Lowers system cost by eliminating the need for extra heat-dissipating and power-processing components; simplifies system design 27 mm x 27 mm, 444-pin BGA packaging Facilitates single row, high port density switch designs Patented, low EMI line driver with integrated line side termination resistors Eliminates the need for as many as 384 passive components in 48-port switch applications Auto-Media Sense™ capability configurable per-port Detects and automatically configures a port for operation with copper or fiber media; auto-enables 10/100/1000BASE-T fixed media ports, 100BASE-FX SFPs, 1000BASE-X SFPs, 1000BASE-T SFPs, triple- speed SFPs, or backplanes 1.2 V 3.3 V SGMII, SerDes VSC8658 Octal 10/100/1000BASE-T 100BASE-FX/1000BASE-X Gigabit Ethernet Transceiver PHY 10/100/1000 Mbps Ethernet MAC 10/100/1000 Mbps Ethernet MAC 10/100/1000 Mbps Ethernet MAC Optics / SFP RJ-45 and Magnetics RJ-45 and Magnetics Optics / SFP RJ-45 and Magnetics SerDes SerDes SerDes Optics / SFP |
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