Datasheet > IMISG509XPB

IMISG509XPB

更新时间： 2024-02-12 13:17:45

品牌	Logo	应用领域
其他 - ETC		时钟发生器
页数	文件大小	规格书
7页	91K
描述
REDUCED EMI CLOCK CHIP CMOS LSI SPECTRUM SPREAD CLOCK GENERATOR

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IMISG509XPB 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.84
Is Samacsys：	N	Base Number Matches：	1

IMISG509XPB 数据手册

www.DataSheet4U.com

IMISG509

REDUCED EMI CLOCK CHIP

April 1996

CMOS LSI

SPECTRUM SPREAD CLOCK GENERATOR

PRODUCT FEATURES

PRODUCT DESCRIPTION

Generates CPU clock signals for microprocessor

systems

The IMISG509 is a spectrum spread clock generator

specially designed for personal computers, laser

printers and other digital systems. IMISG509 uses a

patented concept to generate popular clock frequencies

that are intentionally broadbanded to reduce

electromagnetic interference. The radiated emissions,

associated with either the clock, harmonics or any

signals derived from the clock, nominally reduced by

10 dB and could significantly reduce the cost of

complying with the regulatory requirements.

Reduces measured EMI by 10 dB nominal

4V to 6V operating supply range

Supports CPUs from all major manufacturers.

Wide range of selectable output frequencies

including 60, 50, 48, 40, 33.3, 16.7

Single, low-cost crystal used as reference

frequency

PRCLK is the broadbanded output and can be

programmed by the PRCLK Frequency Selection Table

on Page 2. A single, low cost external crystal is

required as reference frequency for the synthesizer.

The output modulation function can be disabled when

the SSON pin is high.

Glitch-free switching

50% duty cycle

TTL or CMOS compatible outputs with 6 mA drive

capability

Low, short and long-term jitter

16 pin P-DIP and 16 Pin SOIC (300 mil body)

package options

CONNECTION DIAGRAM

VDD

OSCin

OSCout

VSS

MPSEL

AVDD

VDD

BLOCK DIAGRAM

MPCLK

VSS

PRCLK

AVSS

LF1

/4 OR /12

REF

44.2 MHz

MPCLK

SSON

MPSEL

SPECTRUM

SPREAD

PRCLK

CLOCK GEN

APPLICATIONS

SSON

IMISG509 eliminates the need for multiple oscillators

and generates the CPU clock signals for personal

computers, laser printers and other digital systems.

Supports CPUs from all major manufacturers.

INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.

MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571

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