參數(shù)資料
型號： XRT73LC03AIV
廠商： EXAR CORP
元件分類： 數(shù)字傳輸電路
英文描述： 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
中文描述： DATACOM, PCM TRANSCEIVER, PQFP120
封裝： 14 X 20 MM, LQFP-120
文件頁數(shù)： 43/61頁
文件大?。?/td> 720K
代理商： XRT73LC03AIV
XRT73LC03A
3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
REV. 1.0.1
41
3.5.2
for DS3 and STS-1 Applications
When the XRT73LC03A is operating in the DS3 or
STS-1 Mode, then each channel declares and clears
LOS based upon the following two criteria.
Analog LOS (ALOS) Declaration/Clearance Crite-
ria
Digital LOS (DLOS) Declaration/Clearance Crite-
ria
In the DS3 Mode, the LOS output (RLOS) is simply
the logical "OR" of the ALOS and DLOS states.
The LOS Declaration/Clearance Criteria
1. The Analog LOS (ALOS) Declaration/Clearance
Criteria
A channel declares an Analog LOS (ALOS_(n)) Con-
dition if the amplitude of the incoming line signal
drops below a specific amplitude as defined by the
voltage at the LOSTHR input pin, and whether the
Receive Equalizer is enabled or not.
Table 5 presents the various voltage levels at the
LOSTHR input pin, the state of the Receive Equalizer
and the corresponding ALOS (Analog LOS) threshold
amplitudes.
Declaring ALOS
A channel(n) declares ALOS_(n) whenever the ampli-
tude of the receive line signal falls below the Signal
Level to Declare ALOS levels, as specified inTable 5.
Clearing ALOS_(n)
A channel(n) clears ALOS_(n) whenever the ampli-
tude of the receive line signal increases above the
Signal Level to Clear ALOS levels, as specified in
Table 5.
There is approximately a 2dB hysteresis in the re-
ceived signal level that exists between declaring and
clearing ALOS_(n) in order to prevent chattering in
the RLOS_(n) output signal.
Monitoring the State of ALOS_(n)
F
IGURE
27. T
HE
B
EHAVIOR
OF
THE
LOS O
UTPUT
I
NDICATOR
IN
RESPONSE
TO
THE
L
OSS
OF
S
IGNAL
AND
THE
R
ES
-
TORATION
OF
S
IGNAL
Actual Occurrence
of LOS Condition
Line Signal
is Restored
Time Range for
LOS Declaration
Time Range for
LOS Clearance
G.775
Compliance
G.775
Compliance
0 UI
10 UI
0 UI
10 UI
255 UI
255 UI
RTIP/
RRing
RLOS Output Pin
T
ABLE
5: T
HE
ALOS (A
NALOG
LOS) D
ECLARE
AND
C
LEAR
T
HRESHOLDS
FOR
A
GIVEN
SETTING
OF
LOSTHR &
REQEN (DS3
AND
STS-1 A
PPLICATIONS
)
A
PPLICATION
REQEN S
ETTING
LOSTHR S
ETTING
S
IGNAL
L
EVEL
TO
D
ECLARE
ALOS
S
GNAL
L
EVEL
TO
C
LEAR
ALOS
DS3
1
0
1
0
1
1
1
1
<22mV
<17mV
<25mV
<20mV
>90mV
>70mV
>115mV
>90mV
STS-1
相關(guān)PDF資料
PDF描述
XRT73LC04A 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73LC04AIV 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
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XRT73R06IB SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT73LC03AIVF 制造商:Exar Corporation 功能描述:Line Interface Unit 51.84Mbps DS3/E3/STS-1 Serial 120-Pin LQFP
XRT73LC03AIV-F 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 3-Ch DS3, E3, STS-1 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
XRT73LC04A 制造商:EXAR 制造商全稱:EXAR 功能描述:4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73LC04A_08 制造商:EXAR 制造商全稱:EXAR 功能描述:4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73LC04AES 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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