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參數(shù)資料
| 型號(hào)： | CY2282-1 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 100-MHz PentiumII Clock Synthesizer/Driver with Spread Spectrum and USB for Desktop PCs(應(yīng)用于桌上型PC機(jī)并帶有擴(kuò)展頻譜和USB的100MHz奔騰II時(shí)鐘合成器/驅(qū)動(dòng)器) |
| 中文描述： | 100兆赫PentiumII時(shí)鐘合成器/驅(qū)動(dòng)器，帶有擴(kuò)頻和USB的臺(tái)式機(jī)（應(yīng)用于桌上型電腦機(jī)并帶有擴(kuò)展頻譜和100MHz的奔騰的USB的第二時(shí)鐘合成器/驅(qū)動(dòng)器） |
| 文件頁數(shù)： | 6/7頁 |
| 文件大?。?/td> | 112K |
| 代理商： | CY2282-1 |
CY2282-1
CY2282-11S
PRELIMINARY
6
Application Information
Clock traces must be terminated with either series or parallel termination, as they are normally done.
Application Circuit
Summary
A parallel-resonant crystal should be used as the reference to the clock generator. The operating frequency and CLOAD of
this crystal should be as specified in the data sheet. Optional trimming capacitors may be needed if a crystal with a different
CLOAD is used. Footprints must be laid out for flexibility.
Surface mount, low-ESR, ceramic capacitors should be used for filtering. Typically, these capacitors have a value of 0.1
μ
F.
In some cases, smaller value capacitors may be required.
The value of the series terminating resistor satisfies the following equation, where Rtrace is the loaded characteristic imped-
ance of the trace, Rout is the output impedance of the clock generator (specified in the data sheet), and Rseries is the series
terminating resistor.
Rseries > Rtrace – Rout
Footprints must be laid out for optional EMI-reducing capacitors, which should be placed as close to the terminating resistor
as is physically possible. Typical values of these capacitors range from 4.7 pF to 22 pF.
A Ferrite Bead
may
be used to isolate the Board VDD from the clock generator VDD island. Ensure that the Ferrite Bead
offers greater than 50
impedance at the clock frequency, under loaded DC conditions. Please refer to the application note
“Layout and Termination Techniques for Cypress Clock Generators” for more details.
If a Ferrite Bead is used, a 10
μ
F–22
μ
F tantalum bypass capacitor should be placed close to the Ferrite Bead. This capacitor
prevents power supply droop during current surges.
CY2282-1,-11S 28 PIN SOIC
Cd = DECOUPLING CAPACITORS
Ct = OPTIONAL EM-REDUCING CAPACITORS
Cx = OPTIONAL LOAD MATCHING CAPACITOR
Rs = SERIES TERMINATING RESISTORS
XTALIN
XTALOUT
SEL100
VDDPCI
VDDREF
VDDUSB
AVDD
VDDAPIC
VDDCPU
VSS
APIC
CPUCLK
PCICLK_F
PCICLK
REF
USBCLK
SEL100
APIC
CPUCLK
PCICLK_F
PCICLK
REF
USBCLK
Cd
Cd
Ct
Rs
Cx
0.1
μ
F
0.1
μ
F
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CY2282-11S | 100-MHz PentiumII Clock Synthesizer/Driver with Spread Spectrum and USB for Desktop PCs(應(yīng)用于桌上型PC機(jī)并帶有擴(kuò)展頻譜和USB的100MHz奔騰II時(shí)鐘合成器/驅(qū)動(dòng)器) |
| CY2283 | PentiumII, K6, 6x86 100-MHz Clock Synthesizer/Driver for Desktop PCs with ALI or VIA Chipsets, AGP and 3 DIMMs(帶ALI或VIA芯片組，AGP和3DIMM應(yīng)用于桌上型PC機(jī)的奔II，K6, 6x86 100MHz時(shí)鐘合成器/驅(qū)動(dòng)器) |
| CY2285 | 100-MHz PentiumII Clock Synthesizer/Driver with Spread Spectrum for Mobile PCs(應(yīng)用于移動(dòng)PC機(jī)并帶有寬頻譜的100MHz奔騰II時(shí)鐘合成器/驅(qū)動(dòng)器) |
| CY2292FIT | Three-PLL General-Purpose EPROM Programmable Clock Generator |
| CY2292 | Three-PLL General-Purpose EPROM Programmable Clock Generator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY2283 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:PentiumII, K6, 6x86 100-MHz Clock Synthesizer/Driver for Desktop PCs with ALI or VIA Chipsets, AGP and 3 DIMMs |
| CY2283PVC-1 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:PentiumII, K6, 6x86 100-MHz Clock Synthesizer/Driver for Desktop PCs with ALI or VIA Chipsets, AGP and 3 DIMMs |
| CY2283PVC-2 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:PentiumII, K6, 6x86 100-MHz Clock Synthesizer/Driver for Desktop PCs with ALI or VIA Chipsets, AGP and 3 DIMMs |
| CY2285 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:100-MHz Pentium㈢II Clock Synthesizer/Driver with Spread Spectrum for Mobile PCs |
| CY2285PVC-1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CPU System Clock Generator |
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