參數(shù)資料
型號： XRT59L921IB
廠商： EXAR CORP
元件分類： 數(shù)字傳輸電路
英文描述： TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
中文描述： DATACOM, PCM TRANSCEIVER, PBGA316
封裝： 21 X 21 MM, STBGA-316
文件頁數(shù)： 27/32頁
文件大小： 377K
代理商： XRT59L921IB
XRT59L921
25
REV. 1.2.1
TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
indicator. In particular, the XRT59L921 will declare a LOS, between 10 and 255 UI (or E1 bit-periods) after the
actual time the LOS condition occurred. Further, the XRT59L921 will clear the LOS indicator within 10 to 255
UI after restoration of the incoming line signal.
Figure 14
illustrates the LOS Declaration and Clearance
behavior, in response to first, the Loss of Signal event and then afterwards, the restoration of the signal.
2.6
LOS Mute Description
The LOSMute feature is included in the XRT59L921 such that when the input signal to a receiver is too low or
is lost. The LOS_n pin will toggle "High" and at the same time the RPOS_n and RNEG_n outputs are muted to
a "Zero" state to prevent output data chattering.
2.7
The Receive Output Interface block
The purpose of the Receive Output Interface block is to interface directly with the Receiving Terminal
Equipment. The Receive Output Interface block outputs the data (which has been recovered from the incoming
line signal) to the Receive Terminal Equipment via the RxPOS_n and RxNEG_n output pins.
If the Receive Sections of the XRT59L921 has received a Positive-Polarity pulse, via the RTIP_n and RRing_n
input pins, then the Receive Output Interface will output a pulse via the RxPOS_n output pins.
Similarly, if the Receive Sections of the XRT59L921 has received a Negative-Polarity pulse, via the RTIP_n
and RRing_n input pins, then the Receive Output Interface will output a pulse via the RxNEG_n output pins.
N
OTE
:
The Receive Output Interface block does not supply a recovered clock. This device is intended to be used in those
applications, where the Clock Recovery circuit is realized in an ASIC solution.
3.0
SHUTTING OFF THE TRANSMITTER
Each channel (within the XRT59L921) permits the user to shut off the Transmit Driver within their respective
Transmit Section. This feature can come in handy for system redundancy design considerations or during
diagnostic testing. The user can activate this feature by connecting the TxClk_n input pin to a logic “0” (e.g.,
GND) and continue to apply data via the TxPOS_n and TxNEG_n input pins.
F
IGURE
14. T
HE
B
EHAVIOR
OF
THE
LOS O
UTPUT
I
NDICATOR
,
IN
RESPONSE
TO
THE
L
OSS
OF
S
IGNAL
,
AND
THE
R
ESTORATION
OF
THE
S
IGNAL
LOS Output Pin
0 UI
0UI
10 UI
10 UI
Actual Occurrence
of LOS Condition
Line Signal
is Restored
255 UI
255 UI
RxIN
G.775 Compliance
G.775 Compliance
Time Range for
LOS Declaration
Time Range for
LOS Clearance
相關PDF資料
PDF描述
XRT6164A Digital Line Interface Transceiver
XRT6164A_07 Digital Line Interface Transceiver
XRT6164AID Digital Line Interface Transceiver
XRT6164AIP Digital Line Interface Transceiver
XRT6164 Digital Line Interface Transceiver
相關代理商/技術參數(shù)
參數(shù)描述
XRT-600 制造商:Pro-Signal 功能描述:PATCH LEAD CAT5E X-OVER 0.5M 制造商:PRO SIGNAL 功能描述:PATCH LEAD, CAT5E, X-OVER, 0.5M 制造商:pro-power 功能描述:PATCH LEAD, CAT5E, X-OVER, 0.5M; Connector Type A:RJ45 Plug; Connector Type B:RJ45 Plug; Cable Length - Imperial:19.69"; Cable Length - Metric:500mm; Jacket Colour:Grey; Cable Assembly Type:Network; Cable Length:0.5m; Colour:Grey;
XR-T6000CN 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC
XRT-601 制造商:Pro-Signal 功能描述:PATCH LEAD CAT5E X-OVER 1M 制造商:pro-power 功能描述:PATCH LEAD, CAT5E, X-OVER, 1M 制造商:PRIVATE LABEL 功能描述:PATCH LEAD, CAT5E, X-OVER, 1M, Connector Type A:RJ45 Plug, Connector Type B:RJ45
XR-T6010CP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC
XRT-602 制造商:Pro-Signal 功能描述:PATCH LEAD CAT5E X-OVER 2M 制造商:PRO SIGNAL 功能描述:PATCH LEAD, CAT5E, X-OVER, 2M
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*