DS3104-SE Line Card Timing IC with Synchronous Ethernet Support
●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 Ethemet ports. ITU-T recommendation G.8261 (formerly G.pactiming) specifies that network synchronization can be camried 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 xMll 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 xMll 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 xMlI clock.The DS3104-SE accepts the xMIl 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.
●Features
■Timing Card to Line Card Path
◆Two Input Clocks from Master and Slave Timing Cards (LVDS/LVPECL or CMOS/TTL)
◆Optional Frame-Sync Inputs and Outputs
◆Continuous Input Clock Quality Monitoring
◆Hitless Reference Switching,Automatic or Manual
◆Holdover on Loss of All Inputs
◆Programmable PLL Bandwidth,0.1Hz to 400Hz
◆Frequency Conversion Between SONET/SDH
◆Rates and Ethemet MIl/GMIl/XGMII Rates
◆Up to 7 Output Clocks:3 CMOS/TTL (s 125MHz) 2 LVDS/LVPECL (s 312.50MHz),and 2 Dual CMOS/TTL and LVDS/LVPECL
■Line Card to Timing Card Path
◆Up to 8 Input Clocks:4 CMOS/TTL (s 125MHz) and 4 LVDS/LVPECL/CMOS/TTL (s 156.25MHz)
◆Hitless Reference Switching,Automatic or Manual
◆Frequency Conversion Between Ethernet MII/GMII/XGMII and SONET/SDH Rates
◆Two Output Clocks to Master and Slave Timing Cards(CMOS/TTL or LVDS/LVPECL)
■General
◆Suitable Line Card IC for Stratum 3/3E/4,SMC, SEC
◆Numerous Input Clock Frequencies Supported Ethernet xMll:2.5,25,125,156.25MHz S0NET/SDH:6.48,N×19.44,NX51.84MHz PDH:Nx DS1,Nx E1.Nx DS2.DS3.E3 Frame Sync:2kHz,4kHz,8kHz Custom:Any Multiple of 2kHz Up to 131.072MHz Any Multiple of 8kHz Up to 155.52MHz
◆Numerous Output Clock Frequencies Supported Ethernet×Ml:2.5,25,125,156.25,312.5MHz S0NET/SDH6.48,N×19.44,N×51.84MHz PDH:N×DS1,N×E1,NXDS2,DS3,E3 0ther:10,10.24,13,30.72MHz Frame Sync:2kHz,8kHz Custom Clock Rates:Any Multiple of 2kHz Up to 77.76MHz,Any Multiple of 8kHz Up to 311.04MHz.Any Multiple of 10kHz Up to 388.79MHz
◆Internal Compensation for Master Clock Oscillator
◆SPI™ Processor Interface
◆1.8V Operation with 2.5V/3.3V l/O (5V Tolerant)
|
[ MSPPs ][ Ethernet Switches ][ Routers ][ DSLAMs ][ Wireless Base Stations ] |
|
|
Datasheet |
|
|
|
|
Please see the document for details |
|
|
|
|
|
|
|
|
CSBGA |
|
|
English Chinese Chinese and English Japanese |
|
|
April 2012 |
|
|
|
|
|
|
|
|
5.4 MB |
- +1 Like
- Add to Favorites
Recommend
All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.
Integrated Circuits
Discrete Components
Connectors & Structural Components
Assembly UnitModules & Accessories
Power Supplies & Power Modules
Electronic Materials
Instrumentation & Test Kit
Electrical Tools & Materials
Mechatronics
Processing & Customization
