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C9811X2AYB

更新时间: 2024-02-16 06:00:15
品牌 Logo 应用领域
其他 - ETC 时钟发生器
页数 文件大小 规格书
17页 234K
描述
CPU SYSTEM CLOCK GENERATOR|SSOP|56PIN|PLASTIC

C9811X2AYB 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:SSOP包装说明:SSOP-56
针数:56Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.91JESD-30 代码:R-PDSO-G56
JESD-609代码:e0长度:18.415 mm
湿度敏感等级:1端子数量:56
最高工作温度:70 °C最低工作温度:
最大输出时钟频率:100 MHz封装主体材料:PLASTIC/EPOXY
封装代码:SSOP封装等效代码:SSOP56,.4
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, SHRINK PITCH
峰值回流温度(摄氏度):NOT SPECIFIED电源:2.5,3.3 V
主时钟/晶体标称频率:14.318 MHz认证状态:Not Qualified
座面最大高度:2.794 mm子类别:Clock Generators
最大供电电压:3.465 V最小供电电压:3.135 V
标称供电电压:3.3 V表面贴装:YES
技术:CMOS温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn/Pb)端子形式:GULL WING
端子节距:0.635 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:7.5 mm
uPs/uCs/外围集成电路类型:CLOCK GENERATOR, PROCESSOR SPECIFICBase Number Matches:1

C9811X2AYB 数据手册

 浏览型号C9811X2AYB的Datasheet PDF文件第6页浏览型号C9811X2AYB的Datasheet PDF文件第7页浏览型号C9811X2AYB的Datasheet PDF文件第8页浏览型号C9811X2AYB的Datasheet PDF文件第10页浏览型号C9811X2AYB的Datasheet PDF文件第11页浏览型号C9811X2AYB的Datasheet PDF文件第12页 
APPROVED PRODUCT  
C9811x2  
Low EMI Clock Generator for Intel 810 Chipset Systems  
Spread Spectrum Clock Generation (SSCG)  
Spread Spectrum is a modulation technique applied here for maximum efficiency in minimizing Electro-Magnetic  
Interference radiation generated from repetitive digital signals mainly clocks. A clock accumulates EM energy at the  
center frequency it is generating. Spread Spectrum distributes this energy over a small frequency bandwidth therefore  
spreading the same amount of energy over a spectrum. This technique is achieved by modulating the clock down from  
(Fig.9A) or around the center (Fig.9B) of its resting frequency by a certain percentage (which also determines the energy  
distribution bandwidth). In this device, Spread Spectrum is enabled by setting SMBUS byte0, bit3 = 1. The default of the  
device at power up keeps the Spread Spectrum disabled, it is therefore, important to have SMBUS accessibility to turn-  
on the Spread Spectrum function. Once the Spread Spectrum is enabled, the spread bandwidth option is selected by  
SST(0:2) in SMBUS byte 5, bits 5, 6 & 7 following tables 4A, and 4B below.  
In Down Spread mode the center frequency is shifted down from its rested (non-spread) value by ½ of the total spread  
%. (ex.: assuming the center frequency is 100MHz in non-spread mode; when down spread of 0.5% is enabled, the  
center frequency shifts to 99.75MHz.).  
In Center Spread mode, the Center frequency remains the same as in the non-spread mode.  
Down Spread  
Center Spread  
Fig.9A  
Fig.9B  
Spread Spectrum Selection Tables  
Center Frequency  
Spread  
I²C BYTE5  
Bit[7:5]  
100  
Center Frequency  
(MHz)  
Spread  
%
- 0.5  
- 0.7  
- 1.0  
- 1.5  
I²C BYTE5  
Bit[7:5]  
000  
(MHz)  
66/100  
66/100  
66/100  
66/100  
%
± 0.25  
± 0.35  
± 0.5  
± 0.7  
66/100  
66/100  
66/100  
66/100  
101  
110  
111  
001  
010  
011  
Table 4B  
Table 4A  
Cypress Semiconductor Corporation  
525 Los Coches St.  
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571  
http://www.cypress.com  
Document#: 38-07052 Rev. **  
05/03/2001  
Page 9 of 17  

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