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参数资料
| 型号： | ICS84330AY-03 |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 700 MHz, OTHER CLOCK GENERATOR, PQFP32 |
| 封装： | 7 X 7 MM, 1.40 MM HEIGHT, MS-026BBA, LQFP-32 |
| 文件页数： | 16/21页 |
| 文件大小： | 481K |
| 代理商： | ICS84330AY-03 |
84330AY-03
www.icst.com/products/hiperclocks.html
REV. A FEBRUARY 2, 2006
4
Integrated
Circuit
Systems, Inc.
ICS84330-03
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
SPREAD SPECTRUM OPERATION
NOTE: The functional description that follows used a
16.6667MHz crystal with an M divide value of 160.
Spread Spectrum operation is controlled by I2C Data Byte
2, Spread Spectrum Control Register. Bits SSC0 – SSC5
(SS) of the register are a subtrahend to the M-divider for
down-spread, and they are an addend and a subtrahend to
the M-divider for center-spread. When the UP bit is HIGH,
then up-spread has been selected and the M-divider value
will toggle between the programmed M value, and M+SS at
a 32kHz rate. When the DN bit is HIGH, then down-spread
has been selected and the M-divider value will toggle be-
tween the programmed M value, and M-SS at a 32kHz rate.
When both the UP and DN bits are HIGH, then center-
spread has been selected and the M-divider will toggle
between M+SS and M-SS at a 32kHz rate. The table below
shows the desired SS value to achieve 0.5%, 1% and 1.5%
spread at selected VCO frequencies. To disable Spread
Spectrum operation, program both the UP and DN bits to
LOW. Spread Spectrum operation will also be disabled when
the nP_LOAD input is LOW.
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2
TABLE 1B. UP/DOWN SPREAD CONFIGURATION
TABLE 1C. CENTER SPREAD CONFIGURATION
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TABLE 1A. SS MODE FUNCTION TABLE
ICS84330-03
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
TSD
IDT / ICS 700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
ICS84330-03
4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS84330AY-03LF | 制造商:ICS 制造商全称:ICS 功能描述:700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
| ICS84330AY-03LFT | 制造商:ICS 制造商全称:ICS 功能描述:700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
| ICS84330AY-03T | 制造商:ICS 制造商全称:ICS 功能描述:700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
| ICS84330BV | 制造商:ICS 制造商全称:ICS 功能描述:700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
| ICS84330BVT | 制造商:ICS 制造商全称:ICS 功能描述:700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
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