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XRT83SL28IV 参数 Datasheet PDF下载

XRT83SL28IV图片预览
型号: XRT83SL28IV
PDF下载: 下载PDF文件 查看货源
内容描述: 8路E1短程线路接口单元 [8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT]
分类和应用: 数字传输接口电信集成电路电信电路PC
文件页数/大小: 47 页 / 1000 K
品牌: EXAR [ EXAR CORPORATION ]
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XRT83SL28  
xr  
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT  
REV. 1.0.0  
HARDWARE MODE INTERFACE  
NAME  
PIN  
TYPE  
DESCRIPTION  
SR/DR  
2
I
Single Rail / Dual Rail Select Input  
This pin is used to select Single Rail or Dual Rail data formats. By default,  
Dual Rail is selected. To select Single Rail mode, this pin must be pulled  
"High". Once this pin is pulled "High", TNEGn/CODEn can be used to select  
between AMI and HDB3 Encoding/Decoding.  
NOTE: Internally pulled "Low" with a 50kresistor.  
TERSEL1  
TERSEL0  
125  
124  
I
Termination Impedance Select  
TERSEL[1:0] are used to set the internal impedance of the LIU for the Receive  
and Transmit paths.  
"00" = 75for Tx and "High-Z" for Rx  
"01" = 120for Tx and "High-Z" for Rx  
"10" = 75for Tx and Rx  
"11" = 120for Tx and Rx  
TCLKinv  
RCLKinv  
107  
74  
I
I
I
Transmit Clock Data  
"Low" = TPOS/TNEG data is sampled on the falling edge of TCLK  
"High" = TPOS/TNEG data is sampled on the rising edge of TCLK  
NOTE: Internally pulled "Low" with a 50kresistor.  
Receive Clock Data  
"Low" = RPOS/RNEG data is updated on the rising edge of RCLK  
"High" = RPOS/RNEG data is updated on the falling edge of RCLK  
NOTE: Internally pulled "Low" with a 50kresistor.  
LBM1  
LBM0  
56  
57  
Loop Back Mode Select  
LBM[1:0] are used to configure the LIU into diagnostic loopback modes. To  
select the channel number, see pins CHLB[3:0].  
LBM1 LBM0  
Loopback Mode  
No Loopback  
0
0
1
1
0
1
0
1
Analog Loopback  
Remote Loopback  
Digital Loopback  
NOTE: Internally pulled "Low" with a 50kresistor.  
JASEL1  
JASEL0  
20  
21  
I
Jitter Attenuator Select  
JASEL[1:0] are used to configure the jitter attenuator into the Receive or  
Transmit path for all eight channels.  
JASEL1 JASEL0  
JA Select Mode  
JA Disabled  
0
0
1
1
0
1
0
1
Transmit Path  
Receive Path  
JA Disabled  
NOTE: Internally pulled "Low" with a 50kresistor.  
10