參數(shù)資料
型號(hào)： CY28409
廠商： Cypress Semiconductor Corp.
英文描述： Clock Synthesizer with Differential SRC and CPU Outputs
中文描述： 時(shí)鐘合成器與微分SRC以及CPU的輸出
文件頁(yè)數(shù)： 7/18頁(yè)
文件大?。?/td> 330K
代理商： CY28409
CY28409
Document #: 38-07445 Rev. *B
Page 7 of 18
Crystal Recommendations
The CY28409 requires a
Parallel Resonance Crystal
.
Substituting a series resonance crystal will cause the
CY28409 to operate at the wrong frequency and violate the
ppm specification. For most applications there is a 300-ppm
frequency shift between series and parallel crystals due to
incorrect loading.
Crystal Loading
Crystal loading plays a critical role in achieving low ppm perfor-
mance. To realize low ppm performance, the total capacitance
the crystal will see must be considered to calculate the appro-
priate capacitive loading (CL).
Byte 6: Control Register 6
Bit
7
6
5
@Pup
0
0
0
Name
Description
Reserved
Reserved
CPUC0, CPUT0
CPUC1, CPUT1
CPUC2, CPUT2
SRCT, SRCC
Reserved, Set = 0
Reserved, Set = 0
FS_A & FS_B Operation
0 = Normal, 1 = Test mode
4
0
SRC Frequency Select
0 = 100Mhz, 1 = 200MHz
Spread Spectrum Mode
0 = down (default), 1 = center
3
0
PCIF
PCI
3V66
SRCT,SRCC
CPUT_ITP,CPUC_ITP
PCIF
PCI
3V66
SRCT,SRCC
CPUT_ITP,CPUC_ITP
REF_1
2
0
Spread Spectrum Enable
0 = Spread Off, 1 = Spread On
1
1
REF_1 Output Enable
0 = Disabled, 1 = Enabled
REF_0 Output Enable
0 = Disabled, 1 = Enabled
0
1
REF_0
Byte 7: Vendor ID
Bit
@Pup
0
1
0
0
1
0
0
0
Name
Description
7
6
5
4
3
2
1
0
Revision ID Bit 3
Revision ID Bit 2
Revision ID Bit 1
Revision ID Bit 0
Vendor ID Bit 3
Vendor ID Bit 2
Vendor ID Bit 1
Vendor ID Bit 0
Revision ID Bit 3
Revision ID Bit 2
Revision ID Bit 1
Revision ID Bit 0
Vendor ID Bit 3
Vendor ID Bit 2
Vendor ID Bit 1
Vendor ID Bit 0
Table 6. Crystal Recommendations
Frequency
(Fund)
14.31818 MHz
Cut
Loading
Load Cap
Drive
(max.)
0.1 mW
Shunt Cap
(max.)
5 pF
Motional
(max.)
0.016 pF
Tolerance
(max.)
50 ppm
Stability
(max.)
50 ppm
Aging
(max.)
5 ppm
AT
Parallel
20 pF
相關(guān)PDF資料
PDF描述
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CY28409OCT Clock Synthesizer with Differential SRC and CPU Outputs
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CY28409_06 制造商:CYPRESS 制造商全稱(chēng):Cypress Semiconductor 功能描述:Clock Synthesizer with Differential SRC and CPU Outputs
CY28409AZXC 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 SysClk Intel Grntsdl 865 and 875 chipsets RoHS:否 制造商:Silicon Labs 類(lèi)型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
CY28409AZXCT 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 SysClk Intel Grntsdl 865 and 875 chipsets RoHS:否 制造商:Silicon Labs 類(lèi)型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
CY28409OC 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 SysClk Intel Grntsdl 865 and 875 chipsets RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
CY28409OCT 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 SysClk Intel Grntsdl 865 and 875 chipsets RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel
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