DS3104-SE Line Card Timing IC with Synchronous Ethernet Support Data Sheet
●General Description
■The DS3104-SE is a low-cost,feature-rich timing IC for line cards with Synchronous Gigabit Ethernet(GbE),10-Gigabit Ethernet(10GbE),and Fast Ethernet ports.ITU-T recommendation G.8261(formerly G.pactiming)specifies that network synchronization can be carried over packet links by synchronizing the bit clock of the physical layer as is currently done on SONET/SDH links.The DS3104-SE enables synchronization in Ethernet line cards in both the transmit and receive directions.
■In the transmit direction,the device accepts traditional SONET/SDH system clocks such as 19.44MHz from redundant system timing cards and synthesizes frequency-locked xMII clock rates,such as the 125MHz GTX_CLK for GbE GMIIs.Each Ethernet PHY then synthesizes a transmit bit clock that is frequency-locked to the xMII clock,and thus to the system clock and network clock.In the receive direction,each PHY divides down the recovered bit clock to produce the receive xMII clock.The DS3104-SE accepts the xMII clock from any of several Ethernet ports and forwards a frequency-locked system clock,such as 19.44MHz,to the system timing cards.SONET/SDH ports are also supported.
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[ Line Cards with Any Mix of Synchronous Ethernet and SONET/SDH Ports in WAN Equipment ][ MSPPs ][ Ethernet Switches ][ Routers ][ DSLAMs ][ Wireless Base Stations ] |
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Datasheet |
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Please see the document for details |
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81 CSBGA |
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English Chinese Chinese and English Japanese |
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April 2019 |
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3.5 MB |
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