Datasheet > 650R-21LFT

650R-21LFT

更新时间： 2024-09-28 01:06:35

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
8页	202K
描述
SYSTEM PERIPHERAL CLOCK SOURCE

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中文翻译

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数据手册
替代型号

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650R-21LFT 数据手册

DATASHEET

SYSTEM PERIPHERAL CLOCK SOURCE

ICS650-21

Description

Features

The ICS650-21 is a low cost, low-jitter, high-performance

clock synthesizer for system peripheral applications. Using

analog/digital Phase Locked Loop (PLL) techniques, the

device accepts a parallel resonant 25 MHz crystal input to

produce up to eight output clocks. The device provides

clocks for PCI, SCSI, Fast Ethernet, Ethernet, USB, and

AC97. The user can select one of three USB frequencies

and also one of two AC97 audio frequencies. The OE pin

puts all outputs into a high-impedance state for board level

testing. All frequencies are generated with less than one

ppm error, meeting the demands of SCSI and Ethernet

clocking.

• Packaged in 20-pin SSOP (QSOP)

• Pb (lead) free package, RoHS compliant

• Lower jitter version of ICS650-01

• Operating voltage of 3.3 V or 5 V

• Zero ppm synthesis error in all clocks

• Inexpensive 25 MHz crystal or clock input

• Provides Ethernet and Fast Ethernet clocks

• Provides SCSI clocks

• Provides PCI clocks

• Selectable AC97 audio clock

• Selectable USB clock

• OE pin tri-states the outputs for testing

• Selectable frequencies on three clocks

• Duty cycle of 45/55 for Processor clock and Audio clock

• Advanced, low-power CMOS process

• Industrial temperature range available

Block Diagram

VDD

Processor

Clocks

PSEL1:0

ASEL

Audio Clock

Clock

Synthesis

Circuitry

USEL

USB Clock

20 MHz

X1/ICLK

Crystal

Oscillator

25 MHz

Crystal or Clock

25 MHz

Optional crystal

capacitors

OE (all outputs)

GND

IDT™ / ICS™ SYSTEM PERIPHERAL CLOCK SOURCE

ICS650-21

REV J 051310

12 3 4 5 6 7 8

中文翻译

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650R-21LFT 替代型号

型号	品牌	替代类型	描述	数据表
650R-21LF	IDT	完全替代	SYSTEM PERIPHERAL CLOCK SOURCE
650R-21ILFT	IDT	完全替代	SYSTEM PERIPHERAL CLOCK SOURCE
650R-21ILF	IDT	完全替代	SYSTEM PERIPHERAL CLOCK SOURCE

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