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參數(shù)資料
| 型號(hào)： | PEB24902 |
| 廠商： | SIEMENS A G |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | Quad ISDN Echocancellation Circuit Analogue Front End Quad IEC AFE |
| 中文描述： | DATACOM, ISDN ECHO CANCELLER, PQFP64 |
| 文件頁數(shù)： | 15/50頁 |
| 文件大小： | 502K |
| 代理商： | PEB24902 |
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PEB 24902
PEF 24902
System Integration
Semiconductor Group
15
05.96
2
The Quad IEC AFE is optimized for line modules in the central office or access networks
(LT function) together with the PEB 24901 Quad IEC DFE-T for 4B3T code or the PEB
24911 Quad IEC DFE-Q for 2B1Q code. Application in the multi channel NT function
together with the PEB 24911 Quad IEC DFE-Q V2.1 is supported. The PEB 24911 Quad
IEC DFE-Q is footprint compatible to the PEB 24901 Quad IEC DFE-T. This way, one
board layout can be used for both line codes simply by putting the appropriate DFE.
System Integration
2.1
The Quad IEC AFE is controlled via the signal at pin SDX. The transmit data is
transferred the same way. Data on SDX is organized such that two Quad IEC AFE
devices can share the same signal.
The Quad IEC AFE can transmit either 2B1Q-data or 4B3T-data. Setting the pin CODE
to low will result in 2B1Q code. For 4B3T code the pin CODE has to be tied to VDD.
Each of the four line ports is biased by a separate voltage reference. This internal
reference voltage has to be decoupled by a capacitor of 100 nF connected to the VREFx
pin and GND.
The 15.36 MHz master clock is generated with a crystal oscillator and synchronized onto
the PTT clock with an integrated PLL. Fig. 4 shows a 4 channel LT application for 2B1Q
line code. Note, that the PEB 24911 Quad IEC DFE-Q is footprint compatible to the PEB
24901 Quad IEC DFE-T. This way, one board layout can be used for both linecodes
simply by putting the appropriate DFE.
Line Card Application
Figure 4
4 channel LT application
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PEB24902/11 | 制造商:PULSE 制造商全稱:Pulse A Technitrol Company 功能描述:TELECOMMUNICATIONS PRODUCTS |
| PEB24902H | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| PEB24902-HV1.1 | 制造商:Siemens 功能描述:Part Number Only |
| PEB24902HV2.1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| PEB24902HV21XP | 制造商:Lantiq 功能描述:ISDN U 1-Line 15.36Mbps 5V 64-Pin MQFP |
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