參數(shù)資料
型號： XRT83VSH28
廠商： Exar Corporation
英文描述： 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
中文描述： 8路E1短途線路接口單元
文件頁數(shù)： 32/74頁
文件大?。?/td> 574K
代理商： XRT83VSH28
XRT83VSH28
PRELIMINARY
29
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
REV. P1.0.0
3.3
Transmit Jitter Attenuator
The XRT83VSH28 LIU is ideal for multiplexer or mapper applications where the network data crosses multiple
timing domains. As the higher data rates are de-multiplexed down to E1 data, stuffing bits are typically
removed which can leave gaps in the incoming data stream. The transmit path has a dedicated jitter attenuator
with a 32-Bit or 64-Bit FIFO that is used to smooth the gapped clock into a steady E1 output. The maximum
gap width of the 8-channel LIU is shown in
Table 7
.
N
OTE
:
If the LIU is used in a loop timing system, the receive path has a dedicated jitter attenuator. See the Receive
Section of this datasheet.
3.4
TAOS (Transmit All Ones)
The XRT83VSH28 has the ability to transmit all ones on a per channel basis by programming the appropriate
channel register. This function takes priority over the digital data present on the TPOS/TNEG inputs. For
example: If a fixed "0011" pattern is present on TPOS in single rail mode and TAOS is enabled, the transmitter
will output all ones. In addition, if digital or dual loopback is selected, the data on the RPOS output will be
equal to the data on the TPOS input.
Figure 16
is a diagram showing the all ones signal at TTIP and TRING.
F
IGURE
16. TAOS (T
RANSMIT
A
LL
O
NES
)
3.5
Transmit Diagnostic Features
In addition to TAOS, the XRT83VSH28 offers diagnostic features for analyzing network integrity such as
ATAOS and QRSS on a per channel basis by programming the appropriate registers. These diagnostic
features take priority over the digital data present on TPOS/TNEG inputs. The transmitters will send the
diagnostic code to the line and will be maintained in the digital loopback if selected. When the LIU is
responsible for sending diagnostic patterns, the LIU is automatically placed in the single rail mode.
3.5.1
ATAOS (Automatic Transmit All Ones)
If ATAOS is selected by programming the appropriate global register, an AMI all ones signal will be transmitted
for each channel that experiences an RLOS condition. If RLOS does not occur, the ATAOS will remain inactive
until an RLOS on a given channel occurs. A simplified block diagram of the ATAOS function is shown in
Figure 17
.
T
ABLE
7: M
AXIMUM
G
AP
W
IDTH
FOR
M
ULTIPLEXER
/M
APPER
A
PPLICATIONS
FIFO D
EPTH
M
AXIMUM
G
AP
W
IDTH
32-Bit
20 UI
64-Bit
50 UI
TAOS
1
1
1
相關(guān)PDF資料
PDF描述
XRT83VSH28IB 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH314 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH314IB 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH316 16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH316IB 16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT83VSH28ES 功能描述:外圍驅(qū)動器與原件 - PCI 8 CH E1 LIU SH (low cost version) 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
XRT83VSH28IB 功能描述:接口 - 專用 8 Ch T1/E1 Framer RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59
XRT83VSH28IB-F 功能描述:外圍驅(qū)動器與原件 - PCI 8 Channel 1.8V-3.3V 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
XRT83VSH28IB-F 制造商:Exar Corporation 功能描述:T1/E1 LIU IC
XRT83VSH314 制造商:EXAR 制造商全稱:EXAR 功能描述:14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
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