- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄10005 > XRT82D20IW (Exar Corporation)IC LIU EI SGL 28SOJ PDF資料下載
參數(shù)資料
| 型號： | XRT82D20IW |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 5/27頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU EI SGL 28SOJ |
| 標(biāo)準(zhǔn)包裝： | 27 |
| 類型： | 線路接口裝置（LIU） |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | E1 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-BSOJ |
| 供應(yīng)商設(shè)備封裝： | 28-SOJ |
| 包裝： | 管件 |
第1頁第2頁第3頁第4頁當(dāng)前第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁
XRT82D20
12
REV. 1.0.8
SINGLE CHANNEL E1 LINE INTERFACE UNIT
SYSTEM DESCRIPTION
The XRT82D20 is a single channel E1 transceiver that provides an electrical interface for 2.048Mbps
applications. XRT82D20 includes a receive circuit that converts an ITU-T G.703 compliant bipolar signal into a
TTL compatible logic levels. The receiver also includes an LOS (Loss of Signal) detection circuit. Similarly, in
the Transmit Direction, the Transmitter converts TTL compatible logic levels into a G.703 compatible bipolar
signal.
The XRT82D20 consists of both a Receive Section, Jitter Attenuator and Transmit Section; each of these
sections will be discussed below.
1.0
THE RECEIVE SECTION
At the receiver input, cable attenuated AMI signal can be coupled to the receiver using a capacitor or
transformer. The receive data first goes through the peak detector and data slicer for accurate data
recovery.The digital representation of the AMI signals go to the clock recovery circuit for timing recovery and
subsequently to the decoder (if selected) for HDB3 decoding before being output to the RPOS/RData and
RNEG/LCV pins. The digital data output can be in NRZ or RZ format depending the mode of operation
selected and with the option to be in dual-rail or single rail mode. Clock timing recovery of the line interface is
accomplished by means of a digital PLL scheme which has high input jitter tolerance.
The purpose of the Receive Output Interface block is to interface directly with the Receiving Terminal
Equipment.
The Receive Output Interface block outputs the data (which has been recovered from the
incoming line signal) to the Receive Terminal Equipment via the RPOS and RNEG output pins.
If the Receive Section of the XRT82D20 has received a Positive-Polarity pulse, via the RTIP and
RRing input pins, then the Receive Output Interface will output a pulse at the RPOS output pin.
Similarly, if the Receive Section of the XRT82D20 has received a Negative-Polarity pulse, via the RTIP and
RRing input pins, then the Receive Output Interface will output a pulse at the RNEG output pin.
1.1
JITTER ATTENUATOR
To reduce frequency jitter in the transmit clock or receive clock, a crystal-less jitter attenuator is provided. The
jitter attenuator can be selected either in the transmit or receive path or it can be disabled.
1.2
THE TRANSMIT SECTION
In general, the purpose of the Transmit Section (within the XRT82D20) is to accept TTL/CMOS level digital
data (from the Terminal Equipment), and to encode it into a format such that it can:
1. Be efficiently transmitted over coaxial- or twisted pair cable at the E1 data rate; and
2. Be reliably received by the Remote Terminal Equipment at the other end of the E1 data link.
3. Comply with the ITU-T G.703 pulse template requirements, for E1 applications
A 2.048 MHz clock is applied to the TClk input pin and NRZ data at the TPOS and TNEG input pins. The
Transmit Input Interface circuit will sample the data, at the TPOS and TNEG input pins, upon the falling edge of
TClk, as illustrated in Figure 8 below.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC2846CG#TRPBF | IC TXRX 3.3V MULTIPROTCOL 36SSOP |
| GTC06F-16S-8P | CONN PLUG 5POS STRAIGHT W/PINS |
| MS3101E16-10P | CONN RCPT 3POS FREE HNG W/PINS |
| MS27467E17B35SC | CONN PLUG 55POS STRAIGHT W/SCKT |
| MS27656T15F15PA | CONN RCPT 15POS WALL MNT W/PINS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT82D20IW-F | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Single Ch; 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 |
| XRT82D20IW-F | 制造商:Exar Corporation 功能描述:T1/E1 LIU IC |
| XRT82D20IWTR | 功能描述:外圍驅(qū)動器與原件 - PCI Single Ch E1 LIU 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 |
| XRT82D20IWTR-F | 功能描述:外圍驅(qū)動器與原件 - PCI Single Ch E1 LIU 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 |
| XRT82L24 | 制造商:EXAR 制造商全稱:EXAR 功能描述:QUAD E1 LINE TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。