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參數(shù)資料
| 型號： | XRT73L04B |
| 廠商： | Exar Corporation |
| 英文描述： | 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| 中文描述： | 4通道DS3/E3/STS-1線路接口單元 |
| 文件頁數(shù)： | 34/64頁 |
| 文件大?。?/td> | 359K |
| 代理商： | XRT73L04B |
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XRT73L04B
4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
REV. 1.0.1
30
rence of three (3) consecutive zeros (e.g., "000"). If
the B3ZS Encoder finds an occurrence of three con-
secutive zeros, then it substitutes these three "0’s",
with either a "00V" or a "B0V" pattern.
Where:
"B" represents a Bipolar pulse that is compliant with
the Alternating Polarity requirements of the AMI (Al-
ternate Mark Inversion) line code; and
"V" represents a Bipolar Violation (e.g., a bipolar
pulse that violates the Alternating Polarity require-
ments of the AMI line code).
The B3ZS Encoder decides whether to substitute
with either the “00V" or the "B0V" pattern in order to
insure that an odd number of bipolar pulses exist be-
tween any two consecutive violation pulses.
Figure 17 illustrates the B3ZS Encoder at work with
two separate strings of three (or more) consecutive
zeros
2.3.2
If the XRT73L04B is configured to operate in the E3
Mode, then the HDB3/B3ZS Encoder blocks operate
in the HDB3 Mode. When the Encoder is operating in
this mode, it parses through and searches the Trans-
mit Data Stream from the Transmit Logic Block for the
occurrence of four (4) consecutive zeros (e.g.,
"0000"). If the HDB3 Encoder finds an occurrence of
four consecutive zeros, then it substitutes these four
HDB3 Encoding
"0’s", with either a "000V" or a "B00V" pattern. The
HDB3 Encoder decides whether to substitute with ei-
ther the "000V" or the "B00V" pattern in order to in-
sure that an odd number of bipolar pulses exist be-
tween any two consecutive violation pulses.
Figure 18 illustrates the HDB3 Encoder at work with
two separate strings of four (or more) consecutive ze-
ros.
2.3.3
The XRT73L04B HDB3/B3ZS Encoder can be dis-
abled by two methods.
a. Operating in the Hardware Mode.
Disabling the HDB3/B3ZS Encoder
The HBD3/B3ZS Encoder blocks within all channels
are disabled by setting the CS/(SR/DR) input pin to
"1".
N
OTE
:
By executing this step the HDB3/B3ZS Encoder and
Decoder blocks in all channels of the XRT73L04B are glo-
bally disabled.
F
IGURE
17. A
N
E
XAMPLE
OF
B3ZS E
NCODING
TClk
TPOS
SR data
Encoded
PDATA
Encoded
NDATA
1
0
0
1
0
1
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
1
0
1
1
1
0
0
0
1
1
0
0
0
1
0
1
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
0
1
0
1
0
1
0
1
Line signal
B
V
0
V
0
0
0
F
IGURE
18. A
N
E
XAMPLE
OF
HDB3 E
NCODING
TClk
TPOS
SR data
Encoded
PDATA
Encoded
NDATA
1
0
0
1
0
1
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
1
0
1
1
1
0
0
0
1
1
0
0
0
1
0
1
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
0
1
0
1
0
1
0
1
Line signal
B
V
0
V
0
0
0
0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XRT73L04BIV | 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73L04 | 4 Channel E3/DS3/STS-1 Line Interface Unit(4通道 E3/DS3/STS-1線接口單元) |
| XRT73L06 | SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT73L06IB | SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT73LC00A | E3/DS3/STS-1 LINE INTERFACE UNIT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT73L04BES | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT73L04BIV | 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 |
| XRT73L04BIV-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 |
| XRT73L06 | 制造商:EXAR 制造商全稱:EXAR 功能描述:SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT73L06ES | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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