Datasheet > ASM3P2811BF-08TT

ASM3P2811BF-08TT

更新时间： 2024-11-21 20:17:35

品牌	Logo	应用领域
ALSC		时钟 ISM频段光电二极管外围集成电路晶体
页数	文件大小	规格书
10页	168K
描述
Clock Generator, 40MHz, CMOS, PDSO8, TSSOP-8

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ASM3P2811BF-08TT 数据手册

December 2003

ASM3P2811A/B

ASM3P2812A/B

ASM3P2814A/B

rev 1.1

Low Power EMI Reduction IC

Features

deviation range from ±0.625% to –3.50%.

FCC approved method of EMI attenuation.

Provides up to 15dB EMI reduction.

The ASM3P28XX reduces electromagnetic interference

(EMI) at the clock source, allowing system wide reduction

of EMI of down stream clock and data dependent

signals. The ASM3P28XX allows significant system cost

savings by reducing the number of circuit board layers,

ferrite beads, shielding, and other passive components

that are traditionally required to pass EMI regulations.

Generates a 1X, 2X and 4X low EMI spread

spectrum clock of the input frequency.

1X: ASM3P2811A/B

2X: ASM3P2812A/B

4X: ASM3P2814A/B

Optimized for input frequency range from 10MHz

to 40 MHz.

ASM3P2811A/B: 10 to 40MHz

ASM3P2812A/B: 10 to 40MHz

ASM3P2814A/B: 10 to 40MHz

The ASM3P28XX modulates the output of a single PLL in

order to “spread” the bandwidth of a synthesized clock,

and more importantly, decreases the peak amplitudes of

its harmonics. This results in significantly lower system

EMI compared to the typical narrow band signal produced

by oscillators and most frequency generators. Lowering

EMI by increasing a signal’s bandwidth is called ‘spread

spectrum clock generation’.

Internal loop filter minimizes external components

and board space.

Selectable spread options: Down Spread and

Center Spread.

8 spread frequency deviation selections:

±0.625% to –3.5%

Low inherent cycle-to-cycle jitter.

The ASM3P28XX uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented in a proprietary all-digital method.

3.3V operating voltage range.

CMOS/TTL compatible inputs and outputs.

Pinout compatible with Cypress CY25811,

CY25812 and CY25814.

Products are available for commercial and

industrial temperature range.

Applications

The ASM3P28XX is targeted towards EMI management

for memory and LVDS interfaces in mobile graphic

chipsets and high-speed digital applications such as PC

peripheral devices, consumer electronics, and embedded

controller systems.

Available in 8-pin SOIC and TSSOP.

Product Description

The ASM3P28XX devices are versatile spread spectrum

frequency modulators designed specifically for a wide

range of input clock frequencies from 10MHz to 40MHz.

(Refer Input/Output Frequency Range Selection Table).

The ASM3P28XX can generate an EMI reduced clock

from crystal, ceramic resonator, or system clock. The

ASM3P28XX-A and the ASM3P28XX-B offer various

combinations of spread options and percentage

deviations (Refer Output Frequency Deviation and

Spread Option Selection Table). These combinations

include Down and Center Spread and percentage

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.

12 3 4 5 6 7...10

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与ASM3P2811BF-08TT相关器件

型号	品牌	获取价格	描述	数据表
ASM3P2811BG-08SR	PULSECORE	获取价格	Low Power EMI Reduction IC
ASM3P2811BG-08ST	PULSECORE	获取价格	Low Power EMI Reduction IC
ASM3P2811BG-08TR	PULSECORE	获取价格	Low Power EMI Reduction IC
ASM3P2811BG-08TT	PULSECORE	获取价格	Low Power EMI Reduction IC
ASM3P2812A	PULSECORE	获取价格	Low Power EMI Reduction IC
ASM3P2812A	ALSC	获取价格	Low Power EMI Reduction IC
ASM3P2812A-08SR	ALSC	获取价格	Clock Generator
ASM3P2812A-08ST	ALSC	获取价格	Clock Generator
ASM3P2812A-08TR	ALSC	获取价格	Clock Generator
ASM3P2812A-08TT	ALSC	获取价格	Clock Generator

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