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參數(shù)資料
| 型號： | CN8332EXF |
| 英文描述： | PCM Transceiver |
| 中文描述： | 收發(fā)器的PCM |
| 文件頁數(shù)： | 39/48頁 |
| 文件大?。?/td> | 434K |
| 代理商： | CN8332EXF |
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part. Some design considerations are outlined below.
100604B
Conexant
3-1
3
3.0 Applications
The CN8331/CN8332/CN8333 can be used in a variety of applications.
Figure 3-1
illustrates an example of three DS3 lines being terminated by the
CN8333. The data and clock are extracted and passed on to the framer chip for
further data manipulation and user interface.
It is important to employ high-frequency design techniques for the printed
board layout.
3.1 PCB Design Considerations for
CN8331/CN8332/CN8333
The CN8333 device is a triple LIU operating at frequencies up to 52 MHz. The
high-speed nature of the device calls for a careful design of the PCB using this
3.1.1 Power Supply and Ground Plane
A unified power plane with properly placed capacitors of the correct size will
mitigate most power rail-related voltage transients. A properly placed bulk
capacitor, where the power enters the board, with noise-bypassing capacitors at
the power pins on the integrated circuits should be adequate. The noise-bypassing
capacitors must be able to supply all the switching current.
Ferrite beads are used with power rails to filter the high-frequency noise. For
every design, noise frequencies and levels are different. Therefore, whether beads
are necessary, and the effective frequency where they should operate, is difficult
to determine. It is a good idea to provision for ferrite beads on the boards.
The board trace from the CN8333 power supply pin to the noise-bypassing
capacitor should be minimized. Additionally, ground connections from the
ground plane to the CN8333 ground pins and the noise-bypassing capacitor
ground pins should be minimized.
A unified ground plane is the best way to minimize ground impedance. Most
of the ground noise is produced by the return currents and power supply transients
during switching. This effect is minimized by reducing the ground plane
impedance.
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CN8333EXF | PCM Transceiver |
| CN8394KTF | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| CN8398KBG | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| CN8398KPF | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| CN8471AKPF | Industrial Control IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CN8333EXF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PCM Transceiver |
| CN8333EXF28333-15ES1 | 制造商:Conexant 功能描述: |
| CN8366-000 | 制造商:TE Connectivity 功能描述:44/0412-22-9CS1038 |
| CN8371-000 | 制造商:TE Connectivity 功能描述:RNF-100-3/8-WH-SP-CS5004 制造商:TE Connectivity 功能描述:RNF-100-3/8-WH-SP-CS5004 - Bulk |
| CN8373-000 | 制造商:TE Connectivity 功能描述:XFFR-30-04/97 - Bulk |
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