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參數(shù)資料
| 型號： | ZL30410 |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | CONN HDR INVERSE 30POS 5ROW VERT |
| 中文描述： | 多業(yè)務(wù)線卡鎖相環(huán) |
| 文件頁數(shù)： | 16/38頁 |
| 文件大?。?/td> | 400K |
| 代理商： | ZL30410 |
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ZL30410
Data Sheet
16
Zarlink Semiconductor Inc.
SECOR
-
(Secondary Reference Out of Range). Functionally, this pin is equivalent to the PRIOR pin for Primary
Acquisition PLL.
Figure 7 - Primary and Secondary Reference Out of Range Thresholds
4.0 Applications
This section provides application examples frequently found in a typical Line Card being part of Network Element
operating in a synchronous network.
4.1 ZL30410 Switching Between Clock Modes
The ZL30410 is designed to transition from one mode to the other driven by the internal State Machine or by
external control. The following examples present a couple of typical scenarios of how the ZL30410 can be
employed in network interface line cards.
4.1.1 System Start-up Sequence: FREE-RUN --> HOLDOVER --> NORMAL
The FREE-RUN to HOLDOVER to NORMAL transition represents a sequence of steps that will most likely occur
during a new system installation or scheduled maintenance. The process starts from the RESET state and then
transitions to Free-run mode where the system (card) is being initialized. At the end of this process the ZL30410
should be switched into Normal mode (with MS2, MS1 set to 00) instead of Holdover mode. If the reference clock is
available, the ZL30410 will transition briefly into Holdover to acquire synchronization and switch automatically to
Normal mode. If the reference clock is not available at this time, as it may happen during new system installation,
then the ZL30410 will stay in Holdover indefinitely. While in Holdover mode, the Core PLL will continue generating
clocks with the same accuracy as in the Free-run mode, waiting for a good reference clock. When the line card
become connected to the timing card the Acquisition PLL will quickly synchronize and clear its own Holdover status.
This will enable the Core PLL to start the synchronization process. After acquiring lock, the ZL30410 will
automatically switch from Holdover into Normal mode without system intervention. This transition to the Normal
mode will be flagged by the LOCK status pin.
C20i Clock
0 ppm
+4.6 ppm
-4.6 ppm
Accuracy
-9.2
0
7.4
12
-12
9.2
C20
C20
-7.4
-4.6
4.6
13.8 16.6
4.6
-4.6
-16.6 -13.8
-15
-10
0
-20
-5
5
10
15
20
Frequency
Offset [ppm]
Out of Range
Out of Range
Out of Range
In Range
In Range
In Range
0
0
C20
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相關(guān)代理商/技術(shù)參數(shù) |
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| ZL30410_06 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Multi-service Line Card PLL |
| ZL30410QCC | 制造商:Microsemi Corporation 功能描述:PLL CLOCK GEN SGL UP TO 19.44MHZ 80LQFP EP - Trays |
| ZL30410QCC1 | 制造商:Microsemi Corporation 功能描述: |
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| ZL30414 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:SONET/SDH Clock Multiplier PLL |
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