參數(shù)資料
型號: DS21554LN+
廠商: Maxim Integrated Products
文件頁數(shù): 51/124頁
文件大小: 0K
描述: IC TXRX E1 1-CHIP 5V 100-LQFP
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 90
功能: 單芯片收發(fā)器
接口: E1,HDLC,J1,T1
電路數(shù): 1
電源電壓: 4.75 V ~ 5.25 V
電流 - 電源: 75mA
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 100-LQFP
供應(yīng)商設(shè)備封裝: 100-LQFP(14x14)
包裝: 托盤
包括: 遠程和 AIS 警報檢測器 / 發(fā)生器
產(chǎn)品目錄頁面: 1430 (CN2011-ZH PDF)
DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
32 of 124
5.2.
Synchronization And Resynchronization
Once synchronization is accomplished there are certain criteria that can cause a resynchronization. These
criteria are detailed in Table 5-2. Also see Figure 18-14 for a flow chart of the synchronization process.
Table 5-2. SYNC/RESYNC Criteria
FRAME OR
MULTIFRAME
LEVEL
SYNC CRITERIA
RESYNC CRITERIA
ITU SPEC.
FAS
FAS present in frame N
and N + 2, and FAS not
present in frame N + 1
Three consecutive incorrect FAS
received
Alternate (RCR1.2=1) the above
criteria is met or three
consecutive incorrect bit 2 of
non–FAS received
G.706
4.1.1
4.1.2
CRC4
Two valid MF alignment
words found within 8 ms
915 or more CRC4 codewords
out of 1000 received in error
G.706
4.2 and 4.3.2
CAS
Valid MF alignment word
found and previous time
slot 16 contains code other
than all zeros
Two consecutive MF alignment
words received in error
G.732 5.2
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