ASM3P2190A-08SR

更新时间： 2024-11-10 22:25:19

品牌	Logo	应用领域
ALSC		/
页数	文件大小	规格书
7页	118K
描述
Peak Reducing EMI Solution

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中文翻译

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数据手册

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ASM3P2190A-08SR 数据手册

November 2003

rev 1.0

ASM3P2190A

Peak Reducing EMI Solution

Features

Key Specifications

•

Generates an EMI optimized clocking

signal at the output.

Description

Supply voltages

Specification

V_DD= 3.3V ± 5%

6 MHz ≤ 30 MHz

325 ps (typical)

•

Selectable output frequency range.

Single 1.25% or 2.4% down spread

output.

Integrated loop filter components.

Operates with a 3.3V supply.

Low-power CMOS design.

Available in 8-pin SOIC and 8-pin

TSSOP packages.

Frequency range

•

Cycle-to-cycle jitter

Selectable spread percentage

Output duty cycle

-1.25% or –2.4%

40/60% (worst case)

5ns (maximum)

Output rise and fall time

Product Description

Simplified Block Diagram

The ASM3P2190A is a versatile spread spectrum

frequency modulator designed specifically for a

wide range of clock frequencies. The

ASM3P2190A

reduces

electromagnetic

3.3V

interference (EMI) at the clock source, allowing

system wide reduction of EMI of down stream

clock and data dependent signals. The

ASM3P2190A allows significant system cost

savings by reducing the number of circuit board

layers and shielding that are traditionally required

to pass EMI regulations.

The ASM3P2190A 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.

Spread spectrum output

(EMI suppressed)

Pin Diagram

The ASM3P2190A uses the most efficient and

optimized modulation profile approved by the

FCC and is implemented by using a proprietary

all-digital method.

CLKIN / X1

NC / X2

GND

Applications

FS1

VDD

ASM3P2190A

The ASM3P2190A is targeted towards notebook

LCD displays, other displays using an LVDS

interface, PC peripheral devices and embedded

systems.

CLKOUT

SS%

Alliance Semiconductor

2595, Augustine Drive • Santa Clara • CA 95054 • 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

中文翻译

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与ASM3P2190A-08SR相关器件

型号	品牌	获取价格	描述	数据表
ASM3P2190A-08ST	ALSC	获取价格	Peak Reducing EMI Solution
ASM3P2190A-08TR	ALSC	获取价格	Peak Reducing EMI Solution
ASM3P2190A-08TT	ALSC	获取价格	Peak Reducing EMI Solution
ASM3P2274	ONSEMI	获取价格	Multiplier EMI Reduction IC
ASM3P2274_15	ONSEMI	获取价格	Multiplier EMI Reduction IC
ASM3P2274A	ONSEMI	获取价格	4X Multiplier EMI Reduction IC
ASM3P2274A	PULSECORE	获取价格	Low Power 4X Multiplier EMI Reduction IC
ASM3P2274A-06-OR	PULSECORE	获取价格	Clock Generator, 120MHz, CMOS, PDSO6, TSOT-23, 6 PIN
ASM3P2274AF-06OR	ONSEMI	获取价格	4X Multiplier EMI Reduction IC
ASM3P2274AF-06-OR	PULSECORE	获取价格	Clock Generator, 120MHz, CMOS, PDSO6, ROHS COMPLIANT, TSOT-23, 6 PIN

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