- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376461 > XRT7300 (Exar Corporation) E3/DS3/STS-1 LINE INTERFACE UNIT PDF資料下載
參數(shù)資料
| 型號(hào)： | XRT7300 |
| 廠商： | Exar Corporation |
| 英文描述： | E3/DS3/STS-1 LINE INTERFACE UNIT |
| 中文描述： | E3/DS3/STS-1線路接口單元 |
| 文件頁數(shù)： | 22/55頁 |
| 文件大?。?/td> | 608K |
| 代理商： | XRT7300 |
第1頁第2頁第3頁第4頁第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頁當(dāng)前第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁
XRT7300
E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.1.1
á
18
SYSTEM DESCRIPTION
A functional block diagram of the XRT7300 E3/DS3/
STS-1 Transceiver IC (see Figure 1) shows that the
device contains three distinct sections:
The Transmit Section
The Receive Section
The Microprocessor Serial Interface
THE TRANSMIT SECTION
The Transmit Section accepts TTL/CMOS level sig-
nals from the Terminal Equipment in either a Single-
Rail or Dual-Rail format. The Transmit Section then
takes this data and does the following:
Encodes the data into the B3ZS format if the DS3
or SONET STS-1 Modes have been selected or
into the HDB3 format if the E3 Mode has been
selected.
Converts the CMOS level B3ZS or HDB3 encoded
data into pulses with shapes that are compliant with
the various industry standard pulse template
requirements.
Drives these pulses onto the line via the TTIP and
TRING output pins across a 1:1 Transformer.
N
OTE
:
The Transmit Section drives a "1" (or a Mark) on the
line by driving either a positive or negative polarity pulse
across the 1:1 Transformer within a given bit period. The
Transmit Section drives a "0" (or a Space) onto the line by
driving no pulse onto the line.
THE RECEIVE SECTION
The Receive Section receives a bipolar signal from
the line either via a 1:1 Transformer or a 0.01mF Ca-
pacitor. As the Receive Section receives this line sig-
nal it does the following:
Adjusts the signal level through an AGC circuit.
Optionally equalizes this signal for cable loss.
Attempts to quantify a bit-interval within the line sig-
nal as either a “1”, “-1” or a “0” by slicing this data.
This sliced data is used by the Clock Recovery PLL
to recover the timing element within the line signal.
The sliced data is routed to the HDB3/B3ZS
Decoder, during which the original data content as
transmitted by the Remote Terminal Equipment is
restored to its original content.
Outputs the recovered clock and data to the Local
Terminal Equipment in the form of CMOS level sig-
nals via the RPOS, RNEG, RCLK1 and RCLK2 out-
put pins.
THE MICROPROCESSOR SERIAL INTERFACE
The XRT7300 can be configured to operate in either
the Hardware Mode or the HOST Mode.
The Hardware Mode
Connect the HOST/HW input pin (pin 18) to GND to
configure the XRT7300 to operate in the Hardware
Mode.
When the XRT7300 is operating in the Hardware
Mode, the following is true:
1.
The Microprocessor Serial Interface block is
disabled.
2.
The XRT7300 is configured via input pin settings.
Each of the pins associated with the Microprocessor
Serial Interface takes on their alternative role as de-
fined in Table 1.
3.
All of the remaining input pins become active.
T
ABLE
1: R
OLE
OF
M
ICROPROCESSOR
S
ERIAL
I
NTERFACE
PINS
WHEN
THE
XRT7300
IS
OPERATING
IN
THE
H
ARDWARE
M
ODE
P
IN
#
P
IN
N
AME
F
UNCTION
WHILE
IN
THE
H
ARDWARE
M
ODE
11
REGRESET/(RCLK2INV)
RCLK2INV
19
SDI/(LOSMUTEN)
LOSMUTEN
20
SDO/(LCV)
LCV
21
SCLK/(ENCODIS)
ENCODIS
22
CS/(DECODIS)
DECODIS
30
LCV/(RCLK2)
RCLK2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XRT7302 | 2 Channel E3/DS3/STS-1 Line Interface Unit(2通道 E3/DS3/STS-1線接口單元) |
| XRT73L02M | TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT73L02MIV | TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT73L02 | 2 Channel E3/DS3/STS-1 Line Interface Unit(2通道 E3/DS3/STS-1線接口單元) |
| XRT73L03A | 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT7300ES | 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(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT7300IV | 功能描述:外圍驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT7300IV-F | 功能描述:外圍驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT7300IVTR | 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(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT7300IVTR-F | 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(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。