Datasheet > A2814A-08SR

A2814A-08SR

更新时间： 2024-11-09 22:09:03

品牌	Logo	应用领域
ALSC		/
页数	文件大小	规格书
8页	376K
描述
Low-Power EMI Reduction IC

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A2814A-08SR 数据手册

October 2003

rev

P2811/12/14

Low-Power EMI Reduction IC

Features

Deviation and Spread Option Selections section). These

combinations include Down Spread, Center Spread and

percentage deviation range from ±0.625% to -3.50%.

FCC approved method of EMI attenuation

Provides up to 15 dB EMI reduction

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

clock of the input frequency

The P28xx reduces electromagnetic interference (EMI) at

the clock source, allowing a system wide EMI reduction for

all the down stream clocks and data dependent signals.

The P28xx 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.

1X: P2811, 2X: P2812, 4X: P2814

Optimized for input frequency range from 10 to 40

MHz P2811: 10 to 40 MHz P2812: 10 to 40 MHz

P2814: 10 to 40 MHz

Internal loop filter minimizes external components

and board space

Selectable spread options: Down Spread and Center

Spread

Low inherent cycle-to-cycle jitter

Eight spread % selections: ±0.625% to –3.5%

3.3 V operating voltage

CMOS/TTL compatible inputs and outputs

Pinout compatible with Cypress CY25811,

CY25812, and CY25814

Products available for industrial temperature range

Available in 8-pin SOIC and TSSOP

The P28xx modulates the output of a single PLL in order to

“spread” the bandwidth of a synthesized clock, thereby

decreasing 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 clock generators. Lowering EMI by increasing a

signal’s bandwidth is called “spread spectrum clock

generation”.

The P28xx uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented by using a proprietary all-digital method.

Applications

Product Description

The P28xx is targeted towards EMI management for

memory interfaces in mobile graphic chipsets and high-

speed digital applications such as PC peripheral devices,

consumer electronics, and embedded controller systems.

The P28xx is a versatile spread spectrum frequency

modulator designed specifically for input clock frequencies

from 10 to 40 MHz (see Input/Output Frequency Range

Selections). The P28xx can generate an EMI reduced clock

from crystal, ceramic resonator, or system clock. The

P28xx-A and P28xx-B offer various combinations of spread

options and percentage deviations (see Output Frequency

Block Diagram

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 8

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与A2814A-08SR相关器件

型号	品牌	获取价格	描述	数据表
A2814A-08ST	ALSC	获取价格	Low-Power EMI Reduction IC
A2814A-08TR	ALSC	获取价格	Low-Power EMI Reduction IC
A2814A-08TT	ALSC	获取价格	Low-Power EMI Reduction IC
A2814AF-08SR	ALSC	获取价格	Low-Power EMI Reduction IC
A2814AF-08ST	ALSC	获取价格	Low-Power EMI Reduction IC
A2814AF-08TR	ALSC	获取价格	Low-Power EMI Reduction IC
A2814AF-08TT	ALSC	获取价格	Low-Power EMI Reduction IC
A28-2	TE	获取价格	10 TO 1500 MHz CASCADABLE AMPLIFIER
A28-2	MACOM	获取价格	Cascadable, Hi Eff
A28-2_1	TE	获取价格	Cascadable Amplifier 10 to 1500 MHz

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