參數(shù)資料
型號： XRT72L74
廠商： Exar Corporation
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù)： 19/104頁
文件大小： 1301K
代理商： XRT72L74
á
XRT72L74
FOUR CHANNEL, DS3 ATM UNI/CLEAR-CHANNEL FRAMER
PRELIMINARY
REV. P1.0.0
19
G26
G23
F24
F25
RLOS_0
RLOS_1
RLOS_2
RLOS_3
I
Receive LOS (Loss of Signal) Indicator Input (from XRT73L04 E3/DS3/STS-1
Line Interface Unit).
This input pin is intended to be connected to the RLOS (Receive Loss of Signal) out-
put pin of the XRT73L04 E3/DS3 /STS-1 Line Interface IC. The user can monitor the
state of this pin by reading the state of Bit 0 (RLOS) within the Line Interface Scan
Register (Address = 73h).
If this input pin is “Low”, then it means that the XRT73L04 is detecting a sufficient
amount of signal energy on the line, due to the incoming DS3 data-stream. However, if
this input pin is “High”, then it means that the XRT73L04 is not detecting a sufficient
amount of signal energy on the line, due to the incoming DS3 data-stream, and
may be experiencing a “Loss of Signal” condition.
For more information on the operation of the XRT73L04 E3/DS3/STS-1 Line Inter-
face Unit IC, please consult the “XRT73L04 ” data sheet.
N
OTE
:
Asserting the RLOS input pin will cause the XRT72L74 DS3 UNI to declare
an “LOS” (Loss of Signal) condition. Therefore, this input pin should not be used
as a general purpose input.
E23
D25
C26
A26
RxRed_0
RxRed_1
RxRed_2
RxRed_3
O
Receiver Red Alarm Indicator—Receive DS3 Framer:
The UNI asserts this output pin to denote that one of the following conditions is
currently being declared by the Receive DS3 Framer block:
LOS—Loss of Signal Condition
OOF—Out of Frame Condition
AIS—Alarm Indication Signal Detection
N
OTE
:
This output pin is effectively, the “Wired-OR” of the “RxLOS”, the “RxOOF”
and the “RxAIS” output pins.
A22
C21
B21
A21
TAOS_0
TAOS_1
TAOS_2
TAOS_3
O
“Transmit All Ones Signal” (TAOS) Command (for the XRT73L04 LIU IC).
This output pin is intended to be connected to the TAOS input pin of the XR-
T73L04 LIU IC. The user can control the state of this output pin by writing a ‘0’ or
‘1’ to Bit 4 (TAOS) within the Line Interface Drive Register (Address = 0x72). If the
user commands this signal to toggle "High" then it will force the XRT73L04 DS3
Line Transmitter IC to transmit an "All Ones" pattern onto the line. Conversely, if
the user commands this output signal to toggle "Low" then the XRT73L04 DS3
Line Transmitter IC will proceed to transmit data based upon the pattern that it
receives via the TxPOS and TxNEG output pins.
Writing a "1" to Bit 4 of the Line Interface Drive Register (Address = 0x72) will
cause this output pin to toggle "High". Writing a "0" to this bit-field will cause this
output pin to toggle "Low".
N
OTE
:
If the designer is not using the XRT73L04 DS3/E3/STS-1 LIU IC, then this
output pin can be used for other purposes.
PIN DESCRIPTIONS
P
IN
#
N
AME
T
YPE
D
ESCRIPTION
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT72L74IB 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC
XRT7300 制造商:EXAR 制造商全稱:EXAR 功能描述:E3/DS3/STS-1 LINE INTERFACE UNIT
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
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