參數(shù)資料
型號(hào)： XRT75R06DIB
廠商： EXAR CORP
元件分類(lèi)： 數(shù)字傳輸電路
英文描述： SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
中文描述： DATACOM, PCM TRANSCEIVER, PBGA217
封裝： 23 X 23 MM, BGA-217
文件頁(yè)數(shù)： 65/105頁(yè)
文件大?。?/td> 591K
代理商： XRT75R06DIB
á
SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
XRT75R06D
REV. 1.0.0
60
Telcordia GR-253-CORE's recommendation on mapping DS3 data into an STS-1 SPE
An STS-1 frame is a data-structure that consists of 810 bytes (or 6480 bits). A given STS-1 frame can be
viewed as being a 9 row by 90 byte column array (making up the 810 bytes). The frame-repetition rate (for an
STS-1 frame) is 8000 frames/second. Therefore, the bit-rate for an STS-1 signal is (6480 bits/frame * 8000
frames/sec =) 51.84Mbps.
A simple illustration of this SONET STS-1 frame is presented below in Figure 40.
Figure 40 indicates that the very first byte of a given STS-1 frame (to be transmitted or received) is located in
the extreme upper left hand corner of the 90 column by 9 row array, and that the very last byte of a given STS-
1 frame is located in the extreme lower right-hand corner of the frame structure. Whenever a Network Element
transmits a SONET STS-1 frame, it starts by transmitting all of the data, residing within the top row of the STS-
1 frame structure (beginning with the left-most byte, and then transmitting the very next byte, to the right). After
the Network Equipment has completed its transmission of the top or first row, it will then proceed to transmit the
second row of data (again starting with the left-most byte, first). Once the Network Equipment has transmitted
the last byte of a given STS-1 frame, it will proceed to start transmitting the very next STS-1 frame.
The illustration of the STS-1 frame (in Figure 40) is very simplistic, for multiple reasons. One major reason is
that the STS-1 frame consists of numerous types of bytes. For the sake of discussion within this data sheet,
the STS-1 frame will be described as consisting of the following types (or groups) of bytes.
The Transport Overheads (or TOH) Bytes
The Envelope Capacity Bytes
8.2.1.1.1
The Transport Overhead (TOH) Bytes
The Transport Overhead or TOH bytes occupy the very first three (3) byte columns within each STS-1 frame.
Figure 41 presents another simple illustration of an STS-1 frame structure. However, in this case, both the
TOH and the Envelope Capacity bytes are designated in this Figure.
F
IGURE
40. A S
IMPLE
I
LLUSTRATION
OF
THE
SONET STS-1 F
RAME
STS-1 Frame (810 Bytes)
90 Bytes
9 Rows
First Byte of the STS-1 Frame
Last Byte of the STS-1 Frame
相關(guān)PDF資料
PDF描述
XRT75R06 SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT75R06IB SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT75R12D TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
XRT75R12DIB TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
XRT75R12 TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT75R06DIB-F 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 6 Channel 3.3V-5V temp -45 to 85C 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(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
XRT75R06ES 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 6CH T3/E3/STS1LIU+JA 3.3V W/REDUNDANCY RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
XRT75R06IB 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 6CH E3/DS3/STS1 LIU+Jitter Attenuato RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT75R06IB208 制造商:Exar Corporation 功能描述:Line Interface Unit 51.84Mbps DS3/E3/STS-1 Parallel 217-Pin BGA
XRT75R06IB-F 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 6 Channel 3.3V-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(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
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