- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄376461 > XRT73L04AIV (EXAR CORP) 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT PDF資料下載
參數(shù)資料
| 型號(hào)： | XRT73L04AIV |
| 廠商： | EXAR CORP |
| 元件分類(lèi)： | 數(shù)字傳輸電路 |
| 英文描述： | 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| 中文描述： | DATACOM, PCM TRANSCEIVER, PQFP144 |
| 封裝： | 20 X 20 MM, 1.40 MM HEIGHT, HEAT SINK, TQFP-144 |
| 文件頁(yè)數(shù)： | 55/65頁(yè) |
| 文件大?。?/td> | 366K |
| 代理商： | XRT73L04AIV |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)當(dāng)前第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)
XRT73L04A
4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
REV. 2.0.3
51
4.4
The Transmit Section of each Channel in the
XRT73L04A can be shut off. When this feature is in-
voked, the Transmit Section of the configured channel
is shut-off and the Transmit Output signals (e.g.,
TTIP_(n) and TRing_(n)) is tri-stated. This feature is
useful for system redundancy conditions or during di-
agnostic testing.
a. Operating in the Hardware Mode
Shut off the Transmit Driver concurrently within all
Channels by toggling the TxOFF input pin “High".
Turn on the Transmit Driver by toggling the TxOFF in-
put pin “Low".
b. Operating in the HOST Mode
Turn off the Transmit Driver within Channel(n) by set-
ting the TxOFF_(n) bit-field within Command Register
CR1-(n) to "1".
T
X
OFF F
EATURES
Writing a "0" into this bit-field enables the Chan-
nel(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 XRT73L04A was designed such that
either Transmitter can quickly be turned-on or turned-off by
toggling the TxOFF 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 all Channels of the XRT73L04A.
To control the state of all transmitters via the Micro-
processor Serial interface, connect the TxOFF input
pin 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 XRT73L04A 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 37.
COMMAND REGISTER CR1-(n)
D4
D3
D2
D1
D0
TxOFF_(n) TAOS_(n) TxClkINV_(n) TxLEV_(n) Reserved
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)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XRT73L04B | 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73L04BIV | 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73L04 | 4 Channel E3/DS3/STS-1 Line Interface Unit(4通道 E3/DS3/STS-1線(xiàn)接口單元) |
| XRT73L06 | SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT73L06IB | SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT73L04B | 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73L04BES | 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 |
| XRT73L04BIV | 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 |
| XRT73L04BIV-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 |
| XRT73L06 | 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。