參數(shù)資料
型號: XR-T5794
廠商: Exar Corporation
英文描述: Quad E-1 Line Interface Unit
中文描述: 四的E - 1線路接口單元
文件頁數(shù): 2/20頁
文件大小: 201K
代理商: XR-T5794
XR-T5794
2
Rev. 2.01
BLOCK DIAGRAM
Slice
Voltage
Detector
Level
Detector
120
Impedance Selectable
Receivers. Return Loss
Exceeds G.703
(Without Transformer)
Tristate Drivers
Return Loss
Exceeds
ETSI 300 166
Transceiver 2
Transceiver 3
Transceiver 1
0.47 F
TIP
75
Unbalanced
120
Balanced
(or 100
)
75
Transceiver 4
LOS
RXPOS
RXNEG
Slicer
Peak
RXIN
E1/T1-
100
or
RX INPUT
TIP
RING
LOS Threshold Based on G.775
LOOPEN(1.4)
LPMOD(1.4)
2
TXPOS
TXNEG
TXCLK
Driver
TXOUT
R
OUT1
TXEN
TX OUTPUT
TIP
RING
Impedance
Selectable
120
,100
or 75
balanced
75
Unbalanced
(Without Transformer)
TIP
0.47
μ
F
Channel 1
MOUT
Driver
MUX
Channel 2
Channel 3
Channel 4
Note
1
R
OUT
= 68
for 120
line impedance, R
OUT
= 62
for 100
line impedance, R
OUT
= 68
for 75
line impedance
MSEL (0.2)
MONEM
Figure 1. Block Diagram
L
o
c
a
l
/
R
e
m
o
t
e
L
o
o
p
b
a
c
k
PE–65834
TTI 7148
PE–65839
TTI 7149
R
OUT1
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