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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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xr  
XRT83SL28  
REV. 1.0.0  
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT  
RECEIVER SECTION  
NAME  
PIN  
TYPE  
DESCRIPTION  
RTIP7  
RTIP6  
RTIP5  
RTIP4  
RTIP3  
RTIP2  
RTIP1  
RTIP0  
75  
87  
94  
106  
34  
22  
15  
3
I
Receive Differential Tip Input  
RTIP is the positive differential input from the line interface. Along with the  
RRING signal, these pins should be coupled to a 1:1 transformer for proper  
operation.  
RRING7  
RRING6  
RRING5  
RRING4  
RRING3  
RRING2  
RRING1  
RRING0  
76  
86  
95  
105  
33  
23  
14  
4
I
Receive Differential Ring Input  
RRING is the negative differential input from the line interface. Along with the  
RTIP signal, these pins should be coupled to a 1:1 transformer for proper oper-  
ation.  
TRANSMITTER SECTION  
NAME  
PIN  
TYPE  
DESCRIPTION  
TxOE  
9
I
Transmit Output Enable  
Upon power up, the transmitters are tri-stated. Enabling the transmitters is  
selected through the serial microprocessor interface by programming the  
appropriate channel register if this pin is pulled "High". If the TxOE pin is  
pulled "Low", all 8 transmitters are tri-stated.  
NOTE: TxOE is ideal for redundancy applications. See the Redundancy  
Applications Section of this datasheet for more details. Internally  
pulled "Low" with a 50Kresistor.  
DMO7  
DMO6  
DMO5  
DMO4  
DMO3  
DMO2  
DMO1  
DMO0  
73  
72  
O
Driver Monitor Output  
When no transmit output pulse is detected for more than 128 TCLK cycles, the  
DMO pin will go "High" for a minimum of one TCLK cycle. DMO will remain  
"High" until the transmitter sends a valid pulse.  
109  
108  
36  
37  
144  
1
TCLK7  
TCLK6  
TCLK5  
TCLK4  
TCLK3  
TCLK2  
TCLK1  
TCLK0  
69  
66  
I
Transmit Clock Input  
TCLK is the input facility clock used to sample the incoming TPOS/TNEG data.  
TPOS/TNEG data can be sampled on either edge of TCLK selected by TCLK-  
inv in the appropriate global register.  
115  
112  
40  
NOTE: TCLKinv is a global setting that applies to all 8 channels.  
43  
138  
141  
7