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參數(shù)資料
| 型號： | XR-T7295IP |
| 廠商： | EXAR CORP |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | DS3/Sonet STS-1 Integrated Line Receiver |
| 中文描述： | RECEIVER, PDIP20 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-20 |
| 文件頁數(shù)： | 5/20頁 |
| 文件大?。?/td> | 226K |
| 代理商： | XR-T7295IP |
XR-T7295
5
Rev. 1.05
Transmitter
Connect
DSX-3
or STSX-1
Type 728A
Coaxial Cable
0-450 ft.
0-450 ft.
System A
XR-T7295
System B
Figure 2. Application Diagram
SYSTEM DESCRIPTION
Receive Path Configurations
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 XR-T7295 device
into systems already containing external equalizers.
Figure 3illustrates the receive path options.
In Case 1 of Figure 3 the signal from the DSX-3
cross-connect feeds directly into R
IN
. In this mode, the
user should set REQB = 0, engaging the equalizer in the
data path. Table 1and the following sections describe the
receive signal requirements.
In Case 2 of Figure 3 external line build-out (LBO) and
equalizer networks precede the XR-T7295 device. In this
mode, the signal at R
IN
is already equalized, and the
on-chip filters should be bypassed by setting REQB=1.
The signal at R
IN
must meet the amplitude limits
described in Table 1
In applications where the XR-T7295 device is used to
monitor DS3 transmitter outputs directly, the receive
equalizer should be bypassed. Again, the signal at R
IN
must meet the amplitude limits described in Table 1.
Minimum signals are for SOJ devices. Due to increased
package parasitics, add 3dB to all table values for DIP
devices.
Maximum input amplitude under all conditions is 850mV
pk.
Although system designers typically use power in dBm to
describe input levels, the XR-T7295 responds to peak
input signal amplitude. Therefore, the XR-T7295 input
signal limits are given in mV pk. Conversion factors are as
follows:
At DSX3: 390mV pk
At DSX3 + 450 ft. of cable: 310 mV pk
0 dBm
0 dBm
Data
Rate
DS3
REQB
0
LOSTHR
0
Minimum
Signal
80
Unit
mV pk
V
DD
/2
V
DD
0
60
mV pk
40
mV pk
1
80
mV pk
V
DD
/2
V
DD
0
80
mV pk
80
mV pk
STS-1
0
110
mV pk
V
DD
/2
V
DD
0
80
mV pk
60
mV pk
1
110
mV pk
V
DD
/2
V
DD
110
mV pK
110
mV pk
Table 1. Receive Input Signal Amplitude
Requirements
相關PDF資料 |
PDF描述 |
|---|---|
| XR-T7295 | DS3/Sonet STS-1 Integrated Line Receiver |
| XR-T7295IW | DS3/Sonet STS-1 Integrated Line Receiver |
| XR-T7296 | DS3/STS-1, E3 Integrated Line Transmitter |
| XR-T7296IP | DS3/STS-1, E3 Integrated Line Transmitter |
| XR-T7296IW | DS3/STS-1, E3 Integrated Line Transmitter |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XR-T7295IW | 制造商:EXAR 制造商全稱:EXAR 功能描述:DS3/Sonet STS-1 Integrated Line Receiver |
| XR-T7295SIP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ATM/SONET Receiver |
| XR-T7295SIW | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ATM/SONET Receiver |
| XR-T7295TIP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PCM Receiver |
| XR-T7295TIW | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PCM Receiver |
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