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參數(shù)資料
| 型號： | C9810AYB |
| 元件分類： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封裝： | SSOP-48 |
| 文件頁數(shù)： | 6/15頁 |
| 文件大小： | 332K |
| 代理商： | C9810AYB |
+/+
…when timing is critical
C9810
Low EMI Clock Generator for Intel
810 Chipset for Mobile Applications
Advanced Information
IMI Confidential
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
Rev 0.4
8/31/1999
MILPITAS, CA 95035, USA TEL: 408-263-6300, FAX 408-263-6571
Page 14 of 15
http://www.imicorp.com
Suggested Crystal Oscillator Parameters
Characteristic
Symbol
Min
Typ
Max
Units
Conditions
Frequency
Fo
12.00
14.31818
16.00
MHz
Tolerance
TC
-
+/-100
PPM
Note 1
TS
-
+/- 100
PPM
Stability (Ta -10 to +60C) Note 1
TA
-
5
PPM
Aging (first year @ 25C) Note 1
Mode
OM
-
Parallel Resonant, Note 1
Load Capacitance
CL
-
18
-
pF
The crystal’s rated load. Note 1
Effective Series
resistance (ESR)
R1
-
40
-
Ohms
Note 1
Power Dissipation
DL
-
0.10
mW
Note 1
Shunt Capacitance
CO
-
--
8
pF
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 = 34pF
In order to meet the specification for CL = 18pF 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
XIN
L
C
xC
C
+
=
pF
pFx
C
L
18
36
=
+
=
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