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參數(shù)資料
| 型號： | T7295-1 |
| 廠商： | Lineage Power |
| 英文描述： | E3 Integrated Line Receiver(E3 集成線接收器) |
| 中文描述： | 綜合線接收E3展（E3展集成線接收器） |
| 文件頁數(shù)： | 4/14頁 |
| 文件大小： | 321K |
| 代理商： | T7295-1 |
Data Sheet
February 1997
T7295-1 E3 Integrated Line Receiver
4
Lucent Technologies Inc.
Overview
Receive Path Configuration
The diagram in Figure 3 shows a typical system appli-
cation for the T7295-1 device. In the receive signal path
(see Figure 1), the internal equalizer can be included
by setting REQB = 0 or bypassed by setting REQB = 1.
The equalizer bypass option allows easy interfacing of
the T7295-1 device into systems already containing
external equalizers. Figure 4 illustrates the receive path
options for two separate cases.
In case 1, the signal from the coaxial cable feeds
directly into the RIN input. In this mode, the user should
set REQB = 0, engaging the equalizer in the data path
if the cable loss is greater than 6 dB. If the cable loss is
less than 6 dB, the equalizer is bypassed by setting
REQB = 1.
In case 2, an external line and equalizer network pre-
cedes the T7295-1 device. In this mode, the signal at
RIN is already equalized, and the on-chip equalizer
should be bypassed by setting REQB = 1. In both case
1 and case 2, the signal at RIN must meet the ampli-
tude limits described in Table 2.
The recommended receive termination is shown in
Figure 4. The 75
resistor terminates the coaxial
cable with its characteristic impedance. In Figure 4,
case 2, if the fixed equalizer includes the line termina-
tion, the 75
resistor is not required. The signal is
ac-coupled through the 0.01
μ
F capacitor to RIN. The
dc bias at RIN is generated internally. The input capac-
itance at the RIN pin is typically 2.8 pF (SOJ package)
and 3.6 pF (DIP package).
5-2635(C).ar.1
Figure 3. Application Diagram
T7296
TRANSMITTER
SYSTEM A
T7295-1
SYSTEM B
75
COAXIAL CABLE
0 dB—15 dB
T7295-1
T7296
TRANSMITTER
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