Datasheet > ASM3P2870A-08TR

ASM3P2870A-08TR

更新时间： 2024-11-25 20:16:35

品牌	Logo	应用领域
PULSECORE		时钟光电二极管外围集成电路晶体
页数	文件大小	规格书
12页	179K
描述
Clock Generator, 30MHz, CMOS, PDSO8, TSSOP-8

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技术参数
数据手册

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ASM3P2870A-08TR 技术参数

是否Rohs认证：	不符合	生命周期：	Transferred
包装说明：	TSSOP-8	Reach Compliance Code：	unknown
风险等级：	5.84	其他特性：	ALSO OPERATES AT 3.3V SUPPLY
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：	30 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
峰值回流温度（摄氏度）：	NOT SPECIFIED	主时钟/晶体标称频率：	30 MHz
认证状态：	Not Qualified	座面最大高度：	1.1 mm
最大供电电压：	2.625 V	最小供电电压：	2.375 V
标称供电电压：	2.5 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	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	3 mm	uPs/uCs/外围集成电路类型：	CLOCK GENERATOR, OTHER
Base Number Matches：	1

ASM3P2870A-08TR 数据手册

September 2005

rev 1.5

ASM3P2870A

Low Power Peak EMI Reducing Solution

Features

The ASM3P2870A uses the most efficient and optimized

modulation profile approved by the FCC and is

implemented by using a proprietary all digital method.

Generates an EMI optimized clock signal at the

output.

Integrated loop filter components.

Operates with a 3.3 / 2.5V Supply.

Operating current less than 4mA.

Low power CMOS design.

Input frequency range: 13MHz to 30MHz for 2.5V.

: 13MHz to 30MHz for 3.3V.

Generates a 1X low EMI spread spectrum clock of

the input frequency.

Frequency deviation: ±0.75% ( Typ ) @ 22MHz

Input Frequency.

The ASM3P2870A 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’.

Applications

Available in 6-pin TSOT-23, 8-pin SOIC and 8-pin

TSSOP Packages.

The ASM3P2870A is targeted towards all portable

devices with very low power requirements like MP3

players and digital still cameras.

Product Description

The ASM3P2870A is

a versatile spread spectrum

Key Specifications

Description

Supply voltages

Cycle-to-Cycle Jitter

Output Duty Cycle

Modulation Rate Equation

Frequency Deviation

frequency modulator designed specifically for a wide

range of clock frequencies. The ASM3P2870A reduces

electromagnetic interference (EMI) at the clock source,

allowing system wide reduction of EMI of all clock

dependent signals. The ASM3P2870A allows significant

system cost savings by reducing the number of circuit

board layers ferrite beads, shielding that are traditionally

required to pass EMI regulations.

Specification

V_DD= 3.3V / 2.5V

200pS (Max)

45/55%

F_IN/640

±0.75% ( Typ ) @ 22MHz

V_DD

Block Diagram

PLL

Modulation

XIN

XOUT

Crystal

Frequency

Divider

Oscillator

Output

Divider

Phase

Loop

VCO

Detector

Filter

Feedback

Divider

REFOUT

ModOUT

V_SS

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...12

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与ASM3P2870A-08TR相关器件

型号	品牌	获取价格	描述	数据表
ASM3P2870A-08TT	ALSC	获取价格	Low Power Peak EMI Reducing Solution
ASM3P2870A-08TT	PULSECORE	获取价格	Clock Generator, 30MHz, CMOS, PDSO8, TSSOP-8
ASM3P2870AF-06OR	ALSC	获取价格	Low Power Peak EMI Reducing Solution
ASM3P2870AF-06OR	PULSECORE	获取价格	Low Power Peak EMI Reducing Solution
ASM3P2870AF-06OR	ONSEMI	获取价格	30MHz, OTHER CLOCK GENERATOR, PDSO6, ROHS COMPLIANT, TSOT-23, 6 PIN
ASM3P2870AF-08SR	PULSECORE	获取价格	Low Power Peak EMI Reducing Solution
ASM3P2870AF-08SR	ALSC	获取价格	Low Power Peak EMI Reducing Solution
ASM3P2870AF-08ST	ALSC	获取价格	Low Power Peak EMI Reducing Solution
ASM3P2870AF-08ST	PULSECORE	获取价格	Low Power Peak EMI Reducing Solution
ASM3P2870AF-08TR	ONSEMI	获取价格	30MHz, OTHER CLOCK GENERATOR, PDSO8, ROHS COMPLIANT, TSSOP-8

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