參數(shù)資料
型號(hào)： TLIU04C1
英文描述： TLIU04C1 Quad T1/E1 Line Interface
中文描述： TLIU04C1四T1/E1線路接口
文件頁數(shù)： 50/100頁
文件大?。?/td> 1321K
代理商： TLIU04C1
Advance Data Sheet, Rev. 2
TLIU04C1 Quad T1/E1 Line Interface
April 1999
50
Lucent Technologies Inc.
Microprocessor Mode
(continued)
Line Circuitry
The transmit and receive tip/ring connections provide a matched interface to the cable (i.e., terminating impedance
matches the characteristic impedance of the cable). The diagram in Figure 14 shows the appropriate external com-
ponents to interface to the cable for a single transmit/receive channel. The component values are summarized in
Table 30, based on the specific application.
5-3693(F).d
Figure 14. Line Termination Circuitry
Table 30. Termination Components by Application
Resistor tolerances are ±1%. Transformer turns ratio tolerances are ±2%.
1. Use Lucent 2795B transformer.
2. For CEPT 75
applications, Option 1 is recommended over Option 2 for lower device power dissipation. Option 2 increases power dissipa-
tion by 13 mW per channel when driving 50% ones data. Option 2 allows for the use of the same transformer as in CEPT 120
applica-
tions.
3. Use Lucent 2795D transformer.
4. Use Lucent 2795C transformer.
5. A ±5% tolerance is allowed for the transmit load termination, R
L
.
Symbol
Name
Cable Type
CEPT 75
2
Coaxial
Unit
DS1
1
Twisted
Pair
0.1
200
71.5
113
100
±4
0
100
1.14
CEPT 120
4
Twisted Pair
Option 1
3
Option 2
4
C
C
R
P
R
R
R
S
Z
EQ
Center Tap Capacitor
Receive Primary Impedance
Receive Series Impedance
Receive Secondary Impedance
Equivalent Line Termination
Tolerance
Transmit Series Impedance
Transmit Load Termination
5
Transformer Turns Ratio
0.1
200
28.7
82.5
75
±4
26.1
75
1.08
0.1
200
59
102
75
±4
15.4
75
1.36
0.1
200
174
205
120
±4
26.1
120
1.36
μ
F
%
R
T
R
L
N
—
RTIP
RRING
TTIP
TRING
DEVICE
(1 CHANNEL)
R
L
R
S
R
R
R
R
RECEIVE DATA
R
P
Z
EQ
R
T
R
T
N:1
TRANSMIT DATA
TRANSFORMER
EQUIPMENT
INTERFACE
1:N
C
C
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