參數(shù)資料
型號： XRT73LC00AIVTR
廠商： Exar Corporation
文件頁數(shù)： 37/61頁
文件大?。?/td> 0K
描述： IC LIU STS1/DS3/E3 SGL 44TQFP
標(biāo)準(zhǔn)包裝： 1,000
類型： 線路接口裝置（LIU）
驅(qū)動器/接收器數(shù)： 1/1
規(guī)程： DS3，E3，STS-1
電源電壓： 3.135 V ~ 3.465 V
安裝類型： 表面貼裝
封裝/外殼： 44-LQFP
供應(yīng)商設(shè)備封裝： 44-TQFP（10x10）
包裝： 帶卷 (TR)
XRT73LC00A
39
E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.0.2
3.6.2
The LOS Declaration/Clearance Criteria for DS3 and STS-1 Applications
When the XRT73LC00A is operating in the DS3 or STS-1 Modes it declares and clears LOS based on either:
Analog LOS (ALOS) Declaration/Clearance Criteria or,
Digital LOS (DLOS) Declaration/Clearance Criteria
In the DS3 or STS-1 Modes the LOS output (RLOS) is simply the logical OR of the ALOS and DLOS states.
1. The Analog LOS (ALOS) Declaration/Clearance Criteria
The XRT73LC00A declares an Analog LOS (ALOS) Condition if the amplitude of the incoming line signal drops
below a specific amplitude as defined by the state of the LOSTHR input pin.
Declaring ALOS
The XRT73LC00A declares an ALOS (Analog LOS) condition whenever the amplitude of the input signal falls
below the Signal Level to Declare ALOS levels specified in Table 4.
Clearing ALOS
The XRT73LC00A clears ALOS whenever the amplitude of the input signal rises above the Signal Level to
Clear ALOS levels specified in Table 4.
NOTE: There is approximately a 2dB hysteresis in the received signal level that exists between declaring and clearing
ALOS in order to prevent chattering in the RLOS output signal.
Monitoring the State of ALOS
FIGURE 23. THE BEHAVIOR OF THE LOS OUTPUT INDICATOR IN RESPONSE TO THE LOSS OF SIGNAL AND THE RES-
TORATION OF
SIGNAL
TABLE 4: THE ALOS (ANALOG LOS) DECLARE AND CLEAR THRESHOLDS FOR A GIVEN SETTING OF LOSTHR AND
REQEN FOR DS3 AND STS-1 APPLICATIONS
APPLICATION
REQEN SETTING
LOSTHR SETTING
SIGNAL LEVEL TO
DECLARE ALOS
SIGNAL LEVEL TO CLEAR
ALOS
DS3
1
<22mV
>90mV
0
1
<17mV
<70mV
STS-1
1
<25mV
>115mV
0
1
<20mV
<90mV
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
RTIP/
RRing
RLOS Output Pin
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參數(shù)描述
XRT73LC00AIVTR-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
XRT73LC00IV 制造商:EXAR 制造商全稱:EXAR 功能描述:E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73LC03A 制造商:EXAR 制造商全稱:EXAR 功能描述:3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73LC03A_08 制造商:EXAR 制造商全稱:EXAR 功能描述:3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73LC03AES 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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