參數(shù)資料
型號(hào)： C9851BY
廠商： CYPRESS SEMICONDUCTOR CORP
元件分類： XO, clock
英文描述： LED GREEN HIGHBRIGHTNESS
中文描述： 200 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48
封裝： SSOP-48
文件頁(yè)數(shù)： 11/14頁(yè)
文件大?。?/td> 122K
代理商： C9851BY
Clock Generator for Pentium
III Server and Workstation Applications
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress.com
Document#: 38-07068 Rev. **
05/04/2001
Page 11 of 14
PRELIMINARY
C9851
Suggested Oscillator Crystal Parameters
Characteristic
Symbol
Min
Typ
Max
Units
Conditions
Frequency
Tolerance
F
o
T
C
T
S
-
14.17
-
14.31818
-
14.46
+/-100
MHz
PPM
Note 1
Frequency Stability
-
-
+/- 100
PPM
Stability (T
A
-10 to +60C) Note 1
Parallel Resonant, Note 1
Operating Mode
-
-
-
Load Capacitance
C
XTAL
R
ESR
-
20
-
pF
The crystal’s rated load. Note 1
Effective Series
Resistance (ESR)
Note1:
-
40
-
Ohms
Note 2
For best performance and accurate frequencies from this device, It is recommended but not mandatory that the chosen
crystal meets or exceeds these specifications
Note 2: Larger values may cause this device to exhibit oscillator startup problems
To obtain the maximum accuracy, the total circuit loading capacitance should be equal to C
XTAL
. This loading capacitance is the
effective capacitance across the crystal pins and includes the clock generating device pin capacitance (C
FTG
), any circuit trace
capacitance (C
PCB
), and any onboard discrete load capacitance (C
DISC
).
The following formula and schematic illustrates the application of the loading specification of a crystal (C
XTAL
)for a design.
C
L
= (C
XINPCB
+ C
XINFTG
+ C
XINDISC
) X (C
XOUTPCB
+ C
XOUTFTG
+ C
XOUTDISC
)
(C
XINPCB
+ C
XINFTG
+ C
XINDISC
) + (C
XOUTPCB
+ C
XOUTFTG
+ C
OUTDISC
)
Where:
C
XTAL
C
XOUTFTG
= the clock generators XIN pin effective device internal capacitance to ground
C
XOUTFTG
= the clock generators XOUT pin effective device internal capacitance to ground
C
XINPCB
= the effective capacitance to ground of the crystal to device PCB trace
C
XOUTPCB
= the effective capacitance to ground of the crystal to device PCB trace
C
XINDISC
= any discrete capacitance that is placed between the XIN pin and ground
C
XOUTDISC
= any discrete capacitance that is placed between the XOUT pin and ground
= the load rating of the crystal
C
XINPCB
C
XOUTPCB
C
XOUTDISC
C
XINDISC
C
XINFTG
C
XOUTFTG
XIN
XOUT
Clock Generator
As an example, and using this formula for this datasheet’s device, a design that has no discrete loading capacitors (C
DISC
) and each
of the crystal to device PCB traces has a capacitance (C
PCB
) to ground of 4pF (typical value) would calculate as:
C
L
= (4pF + 36pF
+ 0pF) X (4pF + 36pF
+ 0pF) = 40 X 40 = 1600 = 20pF
(4pF + 36pF
+ 0pF) + (4pF + 36pF
+ 0pF) 40 + 40 80
Therefore to obtain output frequencies that are as close to this data sheets specified values as possible, in this design
example, you should specify a parallel cut crystal that is designed to work into a load of 20pF
相關(guān)PDF資料
PDF描述
CA0124E Quad, 1MHz, Operational Amplifiers for Commercial, Industrial, and Military Applications
CA0124M Quad, 1MHz, Operational Amplifiers for Commercial, Industrial, and Military Applications
CA0124M96 Quad, 1MHz, Operational Amplifiers for Commercial, Industrial, and Military Applications
CA0224E Quad, 1MHz, Operational Amplifiers for Commercial, Industrial, and Military Applications
CA0224M Quad, 1MHz, Operational Amplifiers for Commercial, Industrial, and Military Applications
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
C98520-000 制造商:TE Connectivity 功能描述:VARISTOR 240V 14MM RADIAL T/R 制造商:TE Connectivity 功能描述:VARISTOR 240V 6KA DISC 14MM
C9870G 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:High Performance Pentium? 4 Clock Synthesizer
C9870GT 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:High Performance Pentium㈢ 4 Clock Synthesizer
C9870GY 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:High Performance Pentium? 4 Clock Synthesizer
C9872-21 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*