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參數(shù)資料
| 型號： | XRT7295ATIW |
| 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： | DATACOM, PCM TRANSCEIVER, PDSO20 |
| 封裝： | 0.300 INCH, PLASTIC, SOJ-20 |
| 文件頁數(shù)： | 9/18頁 |
| 文件大?。?/td> | 1072K |
| 代理商： | XRT7295ATIW |
XRT7295AT
9
Rev.1.20
STS-1 SIGNAL REQUIREMENTS AT THE STSX
For STS-1 operation, the cross-connect is referred at the
STSX-1.
Table 4
lists the signal requirements at the
STSX-1. Instead of the DS3 isolated pulse template, an
eye diagram mask is specified for STS-1 operation
(TA-TSY-000253). The XRT7295AT correctly decodes
any transmitted signal that meets the mask shown in
Figure 6
at the STSX-1.
Parameter
Specification
Line Rate
Line Code
51.84 Mbps
Bipolar with three-0 substitution (B3ZS)
Test Load
Power Levels
75
±
5%
A wide-band power level measurement
at the STSX-1 interface using a low-pass
filter with a 3dB cutoff frequency of at
least 200MHz is within -2.7 dBm and 4.7
dBm.
Table 4. STSX-1 Interconnection Specification
Figure 6. STSX-1 Isolated Pulse Template for Bellcore TA-TSY-000253
1.0
0.8
0.6
0.4
0.2
0-1.0
-0.5
0
0.5
1.0
1.5
2.0
Time Slots - Normalized To Peak Location
N
LINE TERMINATION AND INPUT CAPACITANCE
The recommended receive termination is shown in
Figure 3
The 75
resistor terminates the coaxial cable
with its characteristic impedance. The 0.01
μ
F capacitor
to R
IN
couples the signal into the receive input without
disturbing the internally generated DC bias level present
on R
IN
. The input capacitance at the R
IN
pin is 2.8pF
typical.
LOSS LIMITS FROM THE DSX-3 TO THE RECEIVE
INPUT
The signal at the cross-connect may travel through a
distribution frame,coaxialcable, connector, splitters, and
back planes before reaching the XRT7295AT device.
This section defines the maximum distribution frame and
cable loss from the cross-connect to the XRT7295AT
input.
The distribution frame jack may introduce 0.6
±
0.55 dB
of loss.
This loss may be any combination of flat or
shaped (cable) loss.
The maximum cable distance between the point where
thetransmittedsignalexitsthedistributionframejackand
the XRT7295AT device is 450 ft. (see
Figure 2.
) The
coaxial cable (Type 728A) used for specifying this
distance limitation has the loss and phasecharacteristics
shown in
Figure 7
and
Figure 8
. Other cable types also
may be acceptable if distances are scaled to maintain
cable loss equivalent to Type 728A cable loss.
TIMING RECOVERY
External Loop Filter Capacitor
Figure 3
shows the connection to an external 0.1
μ
F
capacitorat the LPF1/LPF2pins. This capacitoris partof
the PLL filter. A non-polarized, low-leakage capacitor
shouldbeused. Aceramiccapacitorwiththevalue0.1
μ
F
±
20% is acceptable.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT7295ATIW-F | 功能描述:外圍驅(qū)動器與原件 - PCI -.5V--6.5V temp -45 to 85C RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT7295ATIW-F | 制造商:Exar Corporation 功能描述:T3/E3 LIU IC |
| XRT7295ATIWTR | 功能描述:外圍驅(qū)動器與原件 - PCI RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT7295ATIWTR-F | 功能描述:外圍驅(qū)動器與原件 - PCI RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT7295CTIW | 功能描述:總線接收器 DS3/E3/SONET STS-1 Line Receiver RoHS:否 制造商:Texas Instruments 接收機數(shù)量:4 接收機信號類型:Differential 接口類型:EIA/TIA-422-B, V.11 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-16 封裝:Reel |
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