參數(shù)資料
型號: XRT59L91
廠商: Exar Corporation
英文描述: Single-Chip E1 Line Interface Unit(單片E1 線接口單元)
中文描述: 單芯片E1線路接口單元(單片素E1線接口單元)
文件頁數(shù): 9/28頁
文件大?。?/td> 292K
代理商: XRT59L91
XRT59L91
9
Rev. P2.00
Preliminary
TClk
TxPOS
TxNEG
tSU
tHO
Figure 2. Illustration on how the XRT59L91 Device Samples the data on the
TXPOS and TXNEG input pins
In general, if the XRT59L91 device samples a “1” on the
TxPOS input pin, then the “Transmit Section” of the
device will ultimately generate a positive polarity pulse
via the TTIP and TRing output pins (across a 1:2
transformer). Conversely, if the XRT59L91 device
samples a “1” on the “TxNEG” input pin, then the
“Transmit Section” of the device will ultimately generate
a negative polarity pulse via the TTIP and TRing output
pins (across a 1:2 transformer).
1.2.1 Operating the Transmitter in the
“Clockless” Mode
The user can configure the XRT59L91 device to oper-
ate in the “Clockless” mode by doing the following:
l
Not applying a clock signal to the TXClk input,
and either pulling this pin to VDD or letting it float.
l
By applying RZ (Return to Zero) data to the
TxPOS and TxNEG input pins, as illustrated
below.
TxPOS
TxNEG
TxClk
Data 1 1 0 1 1 0 1
Bit
Period
RZ Pulse width
should conform to
G.703 Template
No pulse is to be applied
in the second half of the
bit period
No Activity in
TxClk Line
Figure 3. IIlustration on how the Terminal Equipment should apply data to the “Transmit Sec-
tion” of the XRT59L91 Device, when operating in the “Clockless” Mode
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相關代理商/技術參數(shù)
參數(shù)描述
XRT59L91ES 功能描述:外圍驅動器與原件 - PCI 1 CH E1 AFE RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT59L91ID 制造商:Exar Corporation 功能描述:
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XRT59L921 制造商:EXAR 制造商全稱:EXAR 功能描述:TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT