參數(shù)資料
型號(hào)： XRT73L02
廠商： Exar Corporation
英文描述： 2 Channel E3/DS3/STS-1 Line Interface Unit(2通道 E3/DS3/STS-1線(xiàn)接口單元)
中文描述： 2頻道E3/DS3/STS-1線(xiàn)路接口單元（2通道E3/DS3/STS-1線(xiàn)接口單元）
文件頁(yè)數(shù)： 52/62頁(yè)
文件大?。?/td> 716K
代理商： XRT73L02
XRT73L02
2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
REV. P1.1.0
á
PRELIMINARY
48
Turn off the Channel (n) Transmit Driver by setting the
TxOFF_(n) bit-field in Command Register CR1-(n) to
"1".
COMMAND REGISTER CR1-(n)
Writing a "0" into this bit-field enables the Channel (n)
Transmit Driver.
N
OTE
:
In order to permit a system designed for redundancy
to quickly shut-off a defective line card and turn-on the
back-up line card, the XRT73L02 was designed such that
either Transmitter can quickly be turned-on or turned-off by
toggling the TxOFF_(n) input pins. This approach is much
quicker then setting the TxOFF_(n) bit-fields via the Micro-
processor Serial Interface.
Table 6 presents a Truth Table which relates the set-
ting of the TxOFF external pin and bit-field for a chan-
nel to the state of the Transmitter. This table applies
to both Channels of the XRT73L02.
To control the state of each transmitter via the Micro-
processor Serial interface, connect the TxOFF_(n) in-
put pins to GND.
4.5
T
HE
T
RANSMIT
D
RIVE
M
ONITOR
F
EATURES
The Transmit Drive Monitor is used to monitor the line
in the Transmit Direction for the occurrence of fault
conditions such as a short circuit on the line, a defec-
tive Transmit Drive in the XRT73L02 or another LIU.
Activate the Channel (n) Transmit Drive Monitor by
connecting the MTIP_(n) pin to the TTIP_(n) line
through a 270 Ohm resistor connected in series, and
connecting the MRing_(n) pin to the TRing_(n) line
through a 270 Ohm resistor connected in series.
Such an approach is illustrated in Figure 30.
D4
D3
D2
D1
D0
TxOFF_(n) TAOS_(n) TxClkINV_(n)TxLEV_(n) TxBIN_(n)
1
X
X
X
X
T
ABLE
6: T
HE
R
ELATIONSHIP
B
ETWEEN
THE
T
X
OFF I
NPUT
P
IN
,
THE
T
X
OFF B
IT
F
IELD
AND
THE
S
TATE
OF
THE
T
RANSMITTER
S
TATE
OF
THE
T
X
OFF
I
NPUT
P
IN
S
TATE
OF
THE
T
X
OFF
B
IT
F
IELD
S
TATE
OF
THE
T
RANSMITTER
LOW
0
ON (Transmitter is Active)
LOW
1
OFF (Transmitter is Tri-Stated)
HIGH
0
OFF (Transmitter is Tri-Stated)
HIGH
1
OFF (Transmitter is Tri-Stated)
F
IGURE
30. T
HE
XRT73L02
EMPLOYING
THE
T
RANSMIT
D
RIVE
M
ONITOR
F
EATURES
R1 = 31.6
R2 = 31.6
Channel (n)
TxPOS_(n)
TxNEG_(n)
TxLineClk_(n)
TTIP_(n)
TRing_(n)
TPData_(n)
TNData_(n)
TxClk_(n)
Only One Channel Shown
1:1
J1
BNC
MTIP_(n)
MRing_(n)
R3 = 270
R4 = 270
相關(guān)PDF資料
PDF描述
XRT73L03A 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L03AIV 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L03B 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L03BIV 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L04A 4 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
XRT73L02M 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73L02MES 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
XRT73L02MIV 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73L02MIV-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
XRT73L02MIVTR-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
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