参数资料
型号: XRT73LC03AIV-F
厂商: Exar Corporation
文件页数: 38/61页
文件大小: 0K
描述: IC LIU E3/DS3/STS-1 3CH 120LQFP
标准包装: 72
类型: 线路接口装置(LIU)
驱动器/接收器数: 3/3
规程: DS3,E3,STS-1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 120-LQFP
供应商设备封装: 120-LQFP(14x20)
包装: 托盘
XRT73LC03A
41
REV. 1.0.4
3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
3.5.2
The LOS Declaration/Clearance Criteria
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.
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)
FIGURE 27. THE BEHAVIOR OF THE LOS OUTPUT INDICATOR IN RESPONSE TO THE LOSS OF SIGNAL AND THE RES-
TORATION OF
SIGNAL
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
TABLE 5: THE ALOS (ANALOG LOS) DECLARE AND CLEAR THRESHOLDS FOR A GIVEN SETTING OF LOSTHR &
REQEN (DS3 AND STS-1 APPLICATIONS)
APPLICATION
REQEN SETTING
LOSTHR SETTING
SIGNAL LEVEL TO
DECLARE ALOS
SGNAL LEVEL TO CLEAR
ALOS
DS3
11
<22mV
>90mV
01
<17mV
>70mV
STS-1
11
<25mV
>115mV
01
<20mV
>90mV
相关PDF资料
PDF描述
XRT73LC04AIV-F IC LIU E3/DS3/STS-1 4CH 144LQFP
XRT73R06IB-F IC LIU E3/DS3/STS-1 6CH 217BGA
XRT73R12IB-L IC LIU E3/DS3/STS-1 12CH 420TBGA
XRT75L00DIV-F IC LIU E3/DS3/STS-1 SGL 52TQFP
XRT75L00IV-F IC LIU E3/DS3/STS-1 SGL 52TQFP
相关代理商/技术参数
参数描述
XRT73LC04A 制造商:EXAR 制造商全称:EXAR 功能描述:4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73LC04A_08 制造商:EXAR 制造商全称:EXAR 功能描述:4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73LC04AES 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流(最大值):595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray
XRT73LC04AIV 功能描述:外围驱动器与原件 - PCI RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray
XRT73LC04AIV-F 功能描述:外围驱动器与原件 - PCI 4-Ch DS3, E3, STS-1 RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray