Figure-4 E1 Waveform Template Diagr" />
參數(shù)資料
型號: IDT82V2082BFG
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 13/88頁
文件大?。?/td> 0K
描述: IC LIU T1/E1/J1 2CH 81BGA
標準包裝: 360
類型: 線路接口裝置(LIU)
規(guī)程: T1,E1,J1
電源電壓: 3.13 V ~ 3.47 V
安裝類型: 表面貼裝
封裝/外殼: 81-LFBGA
供應商設備封裝: 81-CABGA(8x8)
包裝: 托盤
IDT82V2082
DUAL CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
FUNCTIONAL DESCRIPTION
20
May 4, 2009
Figure-4 E1 Waveform Template Diagram
Figure-5 E1 Pulse Template Test Circuit
For T1 applications, the pulse shape is shown in Figure-6 according to
the T1.102 and the measuring diagram is shown in Figure-7. This also
meets the requirement of G.703, 2001. The cable length is divided into five
grades,andtherearefivepulsetemplatesusedforeachofthecablelength.
The pulse template is selected by PULS[3:0] bits (TCF1, 05H...).
Figure-6 DSX-1 Waveform Template
Figure-7 T1 Pulse Template Test Circuit
For J1 applications, the PULS[3:0] (TCF1, 05H...) should be set to
‘0111’. Table-14 lists these values.
3.3.3.2 LBO (Line Build Out)
To prevent the cross-talk at the far end, the output of TTIPn/TRINGn
could be attenuated before transmission for long haul applications. The
FCC Part 68 Regulations specifies four grades of attenuation with a step
of 7.5 dB. Three LBOs are used to implement the pulse attenuation. The
PULS[3:0]bits(TCF1,05H...)areusedtoselecttheattenuationgrade.Both
Table-14 and Table-15 list these values.
-0 .6
-0 .4
-0 .2
0
0 .2
0 .4
0.6
-0 .2 0
0.00
0.2 0
0.4 0
0.6 0
0.8 0
1.00
1.2 0
T im e in U n it In te rv a ls
No
rm
alize
dA
m
plitu
de
IDT82V2082
VOUT
RLOAD
TTIPn
TRINGn
Note: 1. For RLOAD = 75
(nom), Vout (Peak)=2.37V (nom)
2. For RLOAD =120
(nom), Vout (Peak)=3.00V (nom)
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
0
250
500
750
1000
1250
Time (ns)
Normalized
Amplitude
IDT82V2082
TTIPn
TRINGn
Cable
RLOAD VOUT
Note: RLOAD = 100
± 5%
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IDT82V2082PFBLANK 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:DUAL CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT