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參數(shù)資料
| 型號(hào)： | ASM3P2108A-ST |
| 廠商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | 80 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 140K |
| 代理商： | ASM3P2108A-ST |
October 2003
ASM3P2108A
rev 0.3
PRELIMINARY INFORMATION
Alliance Semiconductor
2575, Augustine Drive Santa Clara, CA Tel: 408.855.4900 Fax: 408.855.4999 www.alsc.com
Notice: The information in this document is subject to change without notice.
Low Power EMI Reduction IC
Features
FCC approved method of EMI attenuation.
Provides up to 15dB EMI reduction.
Generates a 4X REF EMI spread output
Spectrum clock of the input frequency.
Optimized for input frequency range from
10 to 20MHz.
Internal Loop Filter minimizes external
components and PC board space.
Down Spread of 1.75%
Very Low Cycle-to-Cycle Jitter.
3.3V operating Range
CMOS / TTL compatible inputs and outputs
Available in 8-pin SOIC and 8-pin TSSOP
packages.
Product Description
The ASM3P2108 device is a versatile spread spectrum
Frequency Synthesizer / Modulator designed
specifically for a wide Range of input clock frequencies
from 10MHZ to 20MHz with a 4X multiplier for output
clock frequencies from 40MHz to 80 MHZ.
The ASM3P2108A generates an EMI reduced clock
signal from a crystal, ceramic resonator, or system
clock. The ASM3P2108A generates a Down Spread of
-1.75% deviation from Center Frequency using a
nonlinear modulation profile.
The ASM3P2108A reduces Electro Magnetic
Interference (EMI), at the Clock Source, allowing
system wide reduction of EMI on downstream clock
and data dependant signals.
The resulting EMI reduction provides for significant
cost savings by reducing the number of circuit board
layers and shielding that are traditionally associated
with designs in order to achieve EMI regulatory
compliance.
The ASM3P2108A modulates the output of a single
PLL in order to “spread” the bandwidth of a
synthesized clock, thereby decreasing the Peak
Amplitudes of its associated harmonics. This results
in significantly lower radiated EMI compared to the
narrow band signal produced by standard oscillators
and most clock synthesizers & generators. This
technique of lowering EMI by increasing the signals
bandwidth is called Spread Spectrum Clocking
(SSC). The ASM3P2108A utilizes the most efficient
and optimized modulation profile approved by the
FCC, and is implemented using a proprietary, All-
Digital Method.
Applications
The ASM3P2108A is targeted towards the Consumer
and PC/Data Processing, or Computation markets.
Entertainment devices, LCD displays, Notebook
computers, PC peripheral devices, embedded
systems, PDA’s, and hand held devices provide a
platform to take full advantage of the feature set of
the ASM3P2108A.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| ASM3P2109A | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Low Power EMI Reduction IC |
| ASM3P2111A | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Peak EMI Reducing Solution |
| ASM3P2111AF-08SR | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Peak EMI Reducing Solution |
| ASM3P2111AF-08ST | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Peak EMI Reducing Solution |
| ASM3P2111B | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Peak EMI Reducing Solution |
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