Datasheet > MK1449S

MK1449S

更新时间： 2024-11-30 22:46:15

品牌	Logo	应用领域
矽成 - ICSI		以太网时钟
页数	文件大小	规格书
4页	64K
描述
Sound/SCSI+Fast Ethernet Clock

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数据手册

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MK1449S 数据手册

MK1449B

Sound/SCSI+Fast Ethernet Clock

Description

Features

• Packaged as 8 pin SOIC

The MK1449B is the most cost effective way to

generate high quality, high frequency clock

outputs for SCSI plus Fast Ethernet devices, or

AC97 sound chips. Using Phase-Locked-Loop

(PLL) techniques, the device uses a standard

fundamental mode, inexpensive 14.31818 MHz

crystal or clock to produce two output clocks.

• For Fast Ethernet plus SCSI on computer

motherboards

• For AC97 sound on computer motherboards

• Less than 1 ppm synthesis error

• Input crystal frequency of 14.31818 MHz

• Operating voltages of 3.0 to 5.5V

• Available in industrial temperature

• Full CMOS level outputs with 25mA drive

capability at TTL levels

The device can accept either a crystal or clock

input. Also on the chip is the ability to generate a

1.25x clock of the reference plus the reference,

making it possible to generate 20 and 25 MHz

clocks from a 20 MHz crystal.

• Ideal for oscillator replacement

• Advanced, low power CMOS process

Block Diagram

VDD GND

Output

S1, S0

CLK1

Buffer

PLL

Clock

Synthesis

and Control

Circuitry

14.31818MHz

crystal

or clock

Output

CLK2

Buffer

Crystal

Oscillator

MDS 1449B C

Revision 120799

Printed 11/15/00

Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408)295-9800tel • www.icst.com

12 3 4

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