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參數(shù)資料
| 型號(hào)： | IMISM532AXB |
| 英文描述： | Miscellaneous Clock Generator |
| 中文描述： | 雜項(xiàng)時(shí)鐘發(fā)生器 |
| 文件頁(yè)數(shù)： | 13/14頁(yè) |
| 文件大?。?/td> | 133K |
| 代理商： | IMISM532AXB |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)當(dāng)前第13頁(yè)第14頁(yè)
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YJGP VKOKPI KU ETKVKECN
SM532
Approved Product
Low EMI Sprectum Spread Clock
International Microcircuits,Inc.
525 Los Coches St., Milpitas, 95035 408-263-6300, FAX 408-263-6571
http:/www.imicorp.com
8/31/98
Rev. 1.4
Page 13 of 14
Figure 10 shows the internal oscillator equivalent circuit for the SM532.
Figure 10. Internal Oscillator Equivalent Circuit
PCB Layout Example
The SM532 Spectrum Spread Clock is a PLL type hybrid circuit. This means that is contains both digital and
analog circuits on the same die. The Phase Detector, Loop Filter and VCO are analog circuits that must operate
in a very low noise environment for best performance. There are several ways to keep this noise to a minimum,
such as bypass capacitors on all power pins and separating the analog and digital power and ground planes. The
figure below uses the first approach of placing bypass capacitors as close to every power pin as possible. In
addition, all ground pins should be connected directly to the ground plane with little or no trace length. Note also
that only the power and ground circuits of the SM532 have been shown. Other circuits such as the Loop Filter
components must be located as close to the Loop Filter pin as possible, for best performance.
Figure 11. SM532 Single Power Plane PCB Layout
1
2
Xin
Xout
.
.
.
1
2
250 K
3 pF
5 pF
VSS
0.1 uf.
22 uf.
VCC
VSS
10 ohm
0.1 uf.
0.1 uf.
VSS
VSS
Pin 1
VSS
VSS
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| IMISM560BZ | 制造商:Cypress Semiconductor 功能描述:PLL Frequency Synthesizer Single 25MHz to 108MHz 8-Pin SOIC 制造商:Rochester Electronics LLC 功能描述:TIMING DEVICE - Bulk |
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