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参数资料
| 型号： | SM561BZ |
| 厂商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 166 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO8 |
| 封装： | SOIC-8 |
| 文件页数： | 5/10页 |
| 文件大小： | 75K |
| 代理商： | SM561BZ |
Spread Spectrum Clock Generator
CYPRESS SEMICONDUCTOR CORPORATION 525 Los Coches St.
Document#: 38-07021 Rev. **
05/04/2001
MILPITAS, CA 95035 TEL: 408-263-6300, FAX 408-263-6571
Page 4 of 10
http://www.cypress.com
APPROVED PRODUCT
SM561
Frequency and Spread % Selection
54– 108 MHz (Low Range)
Input
Frequency
(MHz)
S1=M
S0=M
S1=M
S0=0
S1=1
S0=0
S1=0
S0=0
S1=0
S0=M
54– 60
3.6
3.1
2.6
2.1
1.8
60 – 70
3.5
3.0
2.5
2.0
1.7
70 – 80
3.3
2.8
2.4
1.9
1.6
80 - 100
3.0
2.5
2.1
1.7
1.4
100 - 108
2.6
2.3
1.9
1.5
1.3
108 – 166 MHz (High Range)
Input
Frequency
(MHz)
S1=1
S0=M
S1=0
S0=1
S1=1
S0=1
S1=M
S0=1
108 – 120
2.3
1.7
1.1
0.9
120 – 130
2.3
1.7
1.1
0.9
130 – 140
2.3
1.7
1.1
0.9
140 – 150
2.2
1.6
1.1
0.9
150 - 166
2.1
1.5
1.0
0.8
Table 2. Frequency and Spread % Selection
Tri-Level Logic
With binary logic, 4 states can be programmed with 2 control lines where as Tri-Level Logic can program 9 logic
states using 2 control lines. Tri-Level Logic in the SM561 is implemented by defining a third logic state in addition
to the standard logic “1” and “0”. Pin 6 and 7 of the SM561 recognize a logic state by the voltage applied to the
respective pin. These states are defined as “0” (Low), “M” (Middle) and “1” (One). Each of these states have a
defined voltage range that is interpreted by the SM561 as a “0”, “M” or “1” logic state. Refer to table 5 for voltage
ranges for each logic state.
By using two equal value resistors (typically 20K) the “M” state can be easily
programmed. Pins 6 or 7 can be tied directly to ground or VDD for Logic “0” or “1” respectively.
See examples below;
Select the
Frequency and
Spread %
desired and then
set S1, S0 as
indicated.
Select the
Frequency and
Spread %
desired and then
set S1, S0 as
indicated.
VDD = 3.3 VDC
SM561
5
6
7
SM561
5
6
7
1.65 VDC
0 VDC
7
6
5
SM561
EX. 1
EX. 2
EX. 3
20K
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SM561C107KAN360 | 制造商:AVX Corporation 功能描述:- Bulk |
| SM561K | 制造商:CDE 制造商全称:Cornell Dubilier Electronics 功能描述:Ceramic Capacitors |
| SM562-1 | 功能描述:变压器音频和信号 Line Transformer RoHS:否 制造商:Skyworks Solutions, Inc. 频率范围:810 MHz to 960 MHz 初级线圈阻抗: 次级线圈阻抗: 绝缘电压:23 dB 工作温度范围:- 40 C to + 85 C 端接类型:SMD/SMT 尺寸:6 mm L x 4.9 mm W x 1.6 mm H 产品:Splitters and Combiners |
| SM562-1EL | 制造商:BOURNS 制造商全称:Bourns Electronic Solutions 功能描述:ADSL Line Transformers |
| SM562-1L | 功能描述:变压器音频和信号 Magnetics RoHS:否 制造商:Skyworks Solutions, Inc. 频率范围:810 MHz to 960 MHz 初级线圈阻抗: 次级线圈阻抗: 绝缘电压:23 dB 工作温度范围:- 40 C to + 85 C 端接类型:SMD/SMT 尺寸:6 mm L x 4.9 mm W x 1.6 mm H 产品:Splitters and Combiners |
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