Figure-41 REFB Output Options in Nor" />
參數資料
型號: IDT82P2821BH
廠商: IDT, Integrated Device Technology Inc
文件頁數: 113/151頁
文件大?。?/td> 0K
描述: IC LIU T1/J1/E1 21+1CH 640-PBGA
標準包裝: 5
功能: 線路接口單元(LIU)
接口: E1,J1,T1
電路數: 1
電源電壓: 1.8V, 3.3V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 640-BGA 裸露焊盤
供應商設備封裝: 640-PBGA-EP(31x31)
包裝: 托盤
包括: 缺陷和警報檢測,驅動器過流檢測和保護,LLOS 檢測,PRBSARB / IB 檢測和生成
其它名稱: 82P2821BH
IDT82P2821
21(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Functional Description
64
February 6, 2009
Figure-41 REFB Output Options in Normal Operation
Figure-42 REFA Output in LLOS Condition (When RCLKn Is Selected)
Recovered clock of one
of the 22 channels
JA_BYPAS = 1 ?
No
Clock is derived from the
output of RJA
Clock is derived from the output
of Rx Clock & Data Recovery
Yes
CLKB input
selected by REFB[4:0]
Output on REFB
In LLOS condition.
FS_BYPAS = 1 ?
No
Pass through a
Frequency Synthesizer.
FREE = 1 ?
Output on REFA is free
running (locked to MCLK).
The frequency is
programmed in FREQ[2:0] *.
Output high level.
No
Yes
REFH = 1 ?
Yes
No
Output on REFA is free
running (locked to MCLK).
The frequency is 1.544 MHz
in T1 mode or 2.048 MHz in
E1 mode.
REFH = 1 ?
Yes
No
Note *: '000' and '011' are reserved for FREQ[2:0] when REFA is free running.
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