ICS650R01I ICST [Integrated Circuit Systems], ICS650R01I Datasheet

ICS650R01I

Manufacturer Part Number

ICS650R01I

Description

System Peripheral Clock Source

Manufacturer

ICST [Integrated Circuit Systems]

Datasheet

1.ICS650R01I.pdf (4 pages)

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14.31818 MHz

crystal

MDS 650-01B A

Integrated Circuit Systems • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • (408) 295-9818fax

Description

The ICS650-01B 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 14.31818 MHz crystal

input to produce up to eight output clocks. The

device provides clocks for PCI, SCSI, Fast

Ethernet, Ethernet, and AC97. The user can select

from multiple interface frequencies, and also one

of three 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.

The ICS650 can be mask customized to produce

any frequencies from 1 to 150 MHz.

Block Diagram

PSEL1:0

ASEL

BSEL

Oscillator

Crystal

Synthesis

Circuitry

Clock

Features

• Packaged in 20 pin tiny SSOP (QSOP)

ª Operating VDD of 3.3V or 5V

• Less than one ppm synthesis error in all clocks

• Inexpensive 14.31818 MHz crystal or clock input

• Provides Ethernet and Fast Ethernet clocks

• Provides SCSI clocks

• Provides PCI clocks

• Selectable AC97 audio clock

• Selectable interface clock

• OE pin tri-states the outputs for testing

• Selectable frequencies on three clocks

• Duty cycle of 40/60

• Advanced, low power CMOS process

System Peripheral Clock Source

Output

Output Enable (all outputs)

Output

Buffer

Revision 041499

Processor Clocks

(Fast Ethernet,

SCSI, PCI )

B Clock 1

Audio Clock

B Clock 2

14.31818 MHz

ICS650-01B

Printed 11/15/00

Related parts for ICS650R01I

ICS650R01I Summary of contents

Page 1

Description The ICS650-01B 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 14.31818 MHz crystal input to produce up to eight output clocks. ...

Page 2

Pin Assignment BSEL VDD 17 16 GND 5 GND BCLK1 13 BCLK2 ACLK 10 11 PCLK4 20 pin (150 mil) SSOP Pin Descriptions Pin ...

Page 3

Electrical Specifications Parameter ABSOLUTE MAXIMUM RATINGS (n n ote 1) Supply voltage, VDD Inputs and Clock Outputs Ambient Operating Temperature Soldering Temperature Storage temperature DC CHARACTERISTICS (VDD = 3. unless noted) ) Operating Voltage, VDD Input High ...

Page 4

... Integrated Circuit Systems • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • (408) 295-9818fax System Peripheral Clock Source 45° c Marking Package ICS650R-01 20 pin SSOP ICS650R-01 20 pin SSOP ICS650R01I 20 pin SSOP ICS650R01I 20 pin SSOP 4 ICS650-01B 20 pin SSOP Millimeters Symbol Min Max A 1.55 1.73 b 0.203 ...

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