參數(shù)資料
型號(hào)： DS3104-SE
廠商： Maxim Integrated Products, Inc.
英文描述： Line Card Timing IC with Synchronous Ethernet Support
中文描述： 線路卡同步以太網(wǎng)支持定時(shí)集成電路
文件頁(yè)數(shù)： 1/135頁(yè)
文件大?。?/td> 653K
代理商： DS3104-SE
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________________________________________________________
Maxim Integrated Products
1
Some revisions of this device may incorporate deviations from published specifications known as errata.
Multiple revisions of any device may be simultaneously available through various sales channels. For
information about device errata, go to:
www.maxim-ic.com/errata
. For pricing, delivery, and ordering
information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
DS 3104-S E
S ynchronous Ethernet S upport
Line Card T iming IC with
General Desc ription
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.
Applic ations
Line Cards with Any Mix of Synchronous Ethernet and
SONET/SDH Ports in WAN Equipment Including
MSPPs, Ethernet Switches, Routers, DSLAMs, and
Wireless Base Stations
Ordering Information
PART
TEMP RANGE
-40
°
C to +85
°
C
-40
°
C to +85
°
C
PIN-PACKAGE
81 CSBGA (10mm)
2
81 CSBGA (10mm)
2
DS3104GN
DS3104GN+
+
Denotes a lead-free/RoHS-compliant package.
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 Ethernet MII/GMII/XGMII Rates
Up to 7 Output Clocks: 3 CMOS/TTL (
≤
125MHz),
2 LVDS/LVPECL (
≤
312.50MHz), and 2 Dual
CMOS/TTL and LVDS/LVPECL
Line Card to Timing Card Path
Up to 8 Input Clocks: 4 CMOS/TTL (
≤
125MHz)
and 4 LVDS/LVPECL/CMOS/TTL (
≤
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)
Genera
l
Suitable Line Card IC for Stratum 3/3E/4, SMC,
SEC
Numerous Input Clock Frequencies Supported
Ethernet xMII: 2.5, 25, 125, 156.25MHz
SONET/SDH: 6.48, N x 19.44, N x 51.84MHz
PDH: N x DS1, N x E1, N x 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 xMII: 2.5, 25, 125, 156.25, 312.5MHz
SONET/SDH: 6.48, N x 19.44, N x 51.84MHz
PDH: N x DS1, N x E1, N x DS2, DS3, E3
Other: 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
Internal Compensation for Master Clock
Oscillator
SPI Processor Interface
1.8V Operation with 2.5V/3.3V I/O (5V Tolerant)
Rev: 072407
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