參數(shù)資料
型號(hào)： C9811X2AYB
英文描述： Up to 5A ULDO linear regulator
中文描述： CPU系統(tǒng)時(shí)鐘發(fā)生器| SSOP封裝| 56PIN |塑料
文件頁(yè)數(shù)： 15/17頁(yè)
文件大?。?/td> 232K
代理商： C9811X2AYB
Low EMI Clock Generator for Intel
810 Chipset Systems
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 15 of 17
APPROVED PRODUCT
C9811x2
Suggested Crystal Oscillator Parameters
Characteristic
Symbol
Frequency
F
o
Tolerance
TC
TS
TA
Mode
OM
Load Capacitance
CL
Effective Series
resistance (ESR)
Power Dissipation
DL
Shunt Capacitance
CO
Min
12.00
-
-
-
-
-
-
Typ
Max
16.00
+/-100
+/- 100
5
-
-
-
Units
MHz
PPM
PPM
PPM
Conditions
14.31818
-
-
-
-
18
40
Note 1
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
pF
R1
Ohms
-
-
-
0.10
8
mW
pF
Note 1
Crystal
’
s internal package
capacitance (total)
--
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 = 36pF
In order to meet the specification for CL = 18
p
F following the formula:
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:
XOUT
XIN
XOUT
C
XIN
L
C
xC
+
C
C
=
pF
pF
pF
pF
pFx
C
L
18
36
36
36
+
36
=
=
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相關(guān)代理商/技術(shù)參數(shù)
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C9812 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Low EMI Clock Generator for Intel 810E Chipset Systems
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