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ASM3P5811B-TT: 产品描述Clock Generator, 20MHz, CMOS, PDSO8, TSSOP-8; 产品类别嵌入式处理器和控制器微控制器和处理器; 文件大小179KB，共7页; 制造商PulseCore Semiconductor Corporation

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ASM3P5811B-TT概述

Clock Generator, 20MHz, CMOS, PDSO8, TSSOP-8

ASM3P5811B-TT规格参数

参数名称	属性值
厂商名称	PulseCore Semiconductor Corporation
包装说明	TSSOP-8
Reach Compliance Code	unknown
JESD-30 代码	R-PDSO-G8
长度	4.4 mm
端子数量	8
最高工作温度	70 °C
最低工作温度
最大输出时钟频率	20 MHz
封装主体材料	PLASTIC/EPOXY
封装代码	TSSOP
封装形状	RECTANGULAR
封装形式	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
主时钟/晶体标称频率	20 MHz
认证状态	Not Qualified
座面最大高度	1.1 mm
标称供电电压	3.3 V
表面贴装	YES
技术	CMOS
温度等级	COMMERCIAL
端子形式	GULL WING
端子节距	0.65 mm
端子位置	DUAL
宽度	3 mm
uPs/uCs/外围集成电路类型	CLOCK GENERATOR, OTHER

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September 2003

ASM3P5811B

rev 1.0

Features

FCC approved method of EMI attenuation.

Generates a 1X low EMI spread spectrum clock of

the input frequency.

Input frequency range: 10MHz – 20MHz.

Internal loop filter minimizes external components

and board space.

Frequency deviation: -2.5%

Low inherent cycle-to-cycle jitter.

3.3V operating voltage.

TTL or CMOS compatible inputs and outputs.

Ultra-low power CMOS design.

Pinout

range.

Available in 8-pin SOIC and TSSOP.

TBD mA @ 3.3V, 16.6MHz

compatible

with

Cypress

CY25811.

The ASM3P5811B reduces electromagnetic interference

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

of EMI of

down stream clock and data dependent

signals. The ASM3P5811B 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.

The ASM3P5811B uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented in a proprietary all digital method.

The ASM3P5811B 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’.

Products are available for industrial temperature

Product Description

The ASM3P5811B is a versatile spread spectrum

frequency modulator designed specifically for input clock

frequencies in the range of 10MHz - 20MHz. The

ASM3P5811B can generate an EMI reduced clock from

crystal,

ceramic

resonator,

system

clock.

The

Applications

The ASM3P5811B is targeted towards EMI management

for high speed digital applications such as PC peripheral

devices, consumer electronics and embedded controller

systems.

ASM3P5811B offers a percentage deviation of –2.5%.

Block Diagram

VDD

Modulation

XIN

Crystal

Oscillator

XOUT

Feedback

Divider

Frequency

Divider

PLL

Phase

Detector

Loop

Filter

VCO

Output

Divider

MODOUT

VSS

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.

ASM3P5811B-TT相似产品对比

	ASM3P5811B-TT	ASM3P5811B-TR	ASM3P5811B-ST	ASM3P5811B-SR
描述	Clock Generator, 20MHz, CMOS, PDSO8, TSSOP-8	Clock Generator, 20MHz, CMOS, PDSO8, TSSOP-8	Clock Generator, 20MHz, CMOS, PDSO8, SOIC-8	Clock Generator, 20MHz, CMOS, PDSO8, SOIC-8
包装说明	TSSOP-8	TSSOP-8	SOIC-8	SOIC-8
Reach Compliance Code	unknown	unknown	unknown	unknown
JESD-30 代码	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8
长度	4.4 mm	4.4 mm	4.92 mm	4.92 mm
端子数量	8	8	8	8
最高工作温度	70 °C	70 °C	70 °C	70 °C
最大输出时钟频率	20 MHz	20 MHz	20 MHz	20 MHz
封装主体材料	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
封装代码	TSSOP	TSSOP	SOP	SOP
封装形状	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
封装形式	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE	SMALL OUTLINE
主时钟/晶体标称频率	20 MHz	20 MHz	20 MHz	20 MHz
认证状态	Not Qualified	Not Qualified	Not Qualified	Not Qualified
座面最大高度	1.1 mm	1.1 mm	1.8 mm	1.8 mm
标称供电电压	3.3 V	3.3 V	3.3 V	3.3 V
表面贴装	YES	YES	YES	YES
技术	CMOS	CMOS	CMOS	CMOS
温度等级	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL
端子形式	GULL WING	GULL WING	GULL WING	GULL WING
端子节距	0.65 mm	0.65 mm	1.27 mm	1.27 mm
端子位置	DUAL	DUAL	DUAL	DUAL
宽度	3 mm	3 mm	3.95 mm	3.95 mm
uPs/uCs/外围集成电路类型	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER
厂商名称	PulseCore Semiconductor Corporation	PulseCore Semiconductor Corporation	-	PulseCore Semiconductor Corporation

ASM3P5811B-TT

ASM3P5811B-TT概述

ASM3P5811B-TT规格参数

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ASM3P5811B-TT相似产品对比

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