- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄366628 > C9531 (Cypress Semiconductor Corp.) SMD LED Lamps PDF資料下載
參數(shù)資料
| 型號： | C9531 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | SMD LED Lamps |
| 中文描述： | PCIX I / O系統(tǒng)時鐘發(fā)生器與EMI控制功能 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 176K |
| 代理商： | C9531 |
PCIX I/O System Clock Generator With EMI Control Features
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress.com
Document#: 38-07034 Rev. **
05/02/2001
Page 11 of 14
APPROVED PRODUCT
C9531
Suggested Oscillator Crystal Parameters (Cont.)
The following formula and schematic may be used to understand and calculate either the loading specification of a
crystal for a design or the additional discrete load capacitance that must be used to provide the correct load to a
known load rated crystal.
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 |
|---|---|
| C9706AY | ST92141 - 8/16 BIT MCU FOR 3-PHASE AC MOTOR CONTROL |
| C9726AY | ST92141 - 8/16 BIT MCU FOR 3-PHASE AC MOTOR CONTROL |
| C9801CY | Hex buffer |
| C9805CYB | Quad line receivers |
| C9811X2AYB | Up to 5A ULDO linear regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| C9531_04 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:PCIX I/O System Clock Generator with EMI Control Features |
| C9531CT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU SYSTEM CLOCK GENERATOR|TSSOP|28PIN|PLASTIC |
| C9531CY | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU SYSTEM CLOCK GENERATOR|SSOP|28PIN|PLASTIC |
| C9536-01 | 制造商:HAMAMATSU 制造商全稱:Hamamatsu Corporation 功能描述:UV POWER METER |
| C-9536-BAE | 功能描述:電池座、電池扣和電池接頭 2(AA) BATTERY HOLDER CUSTOM NCNR RoHS:否 制造商:Eagle Plastic Devices 產(chǎn)品:Battery Snaps 電池組電池大小:9 V 電池?cái)?shù)量:1 端接類型:Snaps 顏色:Black 材料:Polyvinyl Chloride (PVC) 安裝風(fēng)格:Snap-In |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。