參數(shù)資料
型號： XRT75L02IV
廠商： EXAR CORP
元件分類： 數(shù)字傳輸電路
英文描述： TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER
中文描述： DATACOM, PCM TRANSCEIVER, PQFP100
封裝： 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, QFP-100
文件頁數(shù)： 28/50頁
文件大?。?/td> 343K
代理商： XRT75L02IV
xr
REV. 1.0.3
XRT75L02
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER
26
For E3 rate, since the output pulse template is measured at the secondary of the transformer and since there is
no Cross-Connect system pulse template requirements, the Transmit Build Out Circuit is always disabled.
4.3.1
Guidelines for using Transmit Build Out Circuit:
If the distance between the transmitter and the DSX3 or STSX-1, Cross-Connect system, is less than 225 feet,
enable the Transmit Build Out Circuit by setting the TxLEV_n input pin “Low” (in Hardware Mode) or setting the
TxLEV_n control bit to “0” (in Host Mode).
If the distance between the transmitter and the DSX3 or STSX-1 is greater than 225 feet, disable the Transmit
Build Out Circuit.
4.3.2
Interfacing to the line:
The differential line driver increases the transmit waveform to appropriate level and drives into the 75
load as
shown in Figure 6.
4.4
Transmit Drive Monitor:
This feature is used for monitoring the transmit line for occurrence of fault conditions such as a short circuit on
the line or a defective line driver.
To activate this function, connect MTIP_n pins to the TTIP_n lines via a 270
resistor and MRing_n pins to
TRING_n lines via 270
resistor as shown in Figure 16.
When the MTIP_n and MRING_n are connected to the TTIP_n and TRING_n lines, the drive monitor circuit
monitors the line for transitions. The DMO_n (Drive Monitor Output) will be asserted “Low” as long as the
transitions on the line are detected via MTIP_n and MRING_n.
If no transitions on the line are detected for 128 ± 32 TxClk_n periods, the DMO_n output toggles “High” and
when the transitions are detected again, DMO_n toggles “Low”.
N
OTES
:
1.
2.
The Drive Monitor Circuit is only for diagnostic purpose and does not have to be used to operate the transmitter
.
With TxMON pin “High”, MTIP and MRING will be internally connected to TTIP and TRING for self-monitoring.
F
IGURE
16. T
RANSMIT
D
RIVER
M
ONITOR
SET
-
UP
.
3
TTIP(n)
TRING(n)
XRT75L02 (0nly one channel shown)
1:1
R3
75
TxPOS(n)
TxNEG(n)
TxLineClk(n)
TPOS(n)
TNEG(n)
TxCLK(n)
RxB
RxA
31.6
+ 1%
31.6
+1%
R1
R2
MRING(n)
MTIP(n)
R5 270
R4 270
相關(guān)PDF資料
PDF描述
XRT75L03D THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
XRT75L04D FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
XRT75L04DIV FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
XRT75L04 FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER
XRT75L04IV FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT75L02IV-F 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 2-Ch DS3, E3, STS-1 RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
XRT75L02IVTR-F 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
XRT75L03 制造商:EXAR 制造商全稱:EXAR 功能描述:THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
XRT75L03D 制造商:EXAR 制造商全稱:EXAR 功能描述:THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
XRT75L03DES 功能描述:時鐘合成器/抖動清除器 3 CH T3/E3/STS1 LIU+DESYNCH3.3V RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
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