欢迎访问ic37.com |
会员登录 免费注册
发布采购

C9812DYB 参数 Datasheet PDF下载

C9812DYB图片预览
型号: C9812DYB
PDF下载: 下载PDF文件 查看货源
内容描述: 低EMI时钟发生器为Intel 810E芯片组的系统 [Low EMI Clock Generator for Intel 810E Chipset Systems]
分类和应用: 时钟发生器
文件页数/大小: 18 页 / 270 K
品牌: CYPRESS [ CYPRESS ]
 浏览型号C9812DYB的Datasheet PDF文件第10页浏览型号C9812DYB的Datasheet PDF文件第11页浏览型号C9812DYB的Datasheet PDF文件第12页浏览型号C9812DYB的Datasheet PDF文件第13页浏览型号C9812DYB的Datasheet PDF文件第14页浏览型号C9812DYB的Datasheet PDF文件第16页浏览型号C9812DYB的Datasheet PDF文件第17页浏览型号C9812DYB的Datasheet PDF文件第18页  
APPROVED PRODUCT  
C9812  
Low EMI Clock Generator for Intel 810E Chipset Systems  
Suggested Crystal Oscillator Parameters  
Characteristic  
Frequency  
Symbol  
Fo  
Min  
Typ  
Max  
Units  
MHz  
PPM  
PPM  
PPM  
Conditions  
12.00  
14.31818  
16.00  
Tolerance  
TC  
-
-
-
-
-
-
-
-
+/-100  
Note 1  
TS  
+/- 100  
Stability (Ta -10 to +60C) Note 1  
Aging (first year @ 25C) Note 1  
Parallel Resonant, Note 1  
The crystal’s rated load. Note 1  
Note 1  
TA  
-
5
-
Mode  
OM  
CL  
-
Load Capacitance  
18  
40  
-
pF  
Effective Series  
resistance (ESR)  
R1  
-
Ohms  
Power Dissipation  
Shunt Capacitance  
DL  
-
-
-
0.10  
8
mW  
pF  
Note 1  
Crystal’s internal package  
capacitance (total)  
CO  
--  
Note1: For best performance and accurate Center frequencies of this device, It is recommended but not mandatory that  
the chosen crystal meets these specifications  
For maximum accuracy, the total circuit loading capacitance should be equal to CL. This loading capacitance is the  
effective capacitance across the crystal pins and includes the device pin capacitance (CP) in parallel with any circuit  
traces, the clock generator and any onboard discrete load capacitors.  
Budgeting Calculations  
Device pin capacitance: Cxtal = 34pF  
In order to meet the specification for CL = 18pF following the formula:  
CXIN xCXOUT  
CL =  
CXIN + CXOUT  
Then the board trace capacitance between Xin and the crystal should be no more than 2pF. (same is applicable to the  
trace between Xout and the crystal)  
In this case the total capacitance from the crystal to Xin will be 36pF. Similarly the total capacitance between the crystal  
and Xout will be 36pF. Hence using the above formula:  
36pFx36pF  
CL =  
= 18pF  
36pF + 36pF  
Cypress Semiconductor Corporation  
525 Los Coches St.  
Document#: 38-07053 Rev. **  
05/03/01  
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571  
http://www.cypress.com  
Page 15 of 18  
 复制成功!