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ICS650-01B

Part Number	ICS650-01B
Manufacturer	Integrated Circuit Systems
Description	System Peripheral Clock Source
Published	Apr 27, 2006
Detailed Description	ICS650-01B System Peripheral Clock Source Description The ICS650-01B is a low cost, low jitter, high performance clock s...
Datasheet	ICS650-01B PDF File

Overview

ICS650-01B System Peripheral Clock Source 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.
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 Block Diagram 4 Processor Clocks (Fast Ethernet, SCSI, PCI ) Audio Clock B Clock 1 B Clock 2 14.
31818 MHz PSEL1:0 ASEL BSEL 14.
31818 MHz crystal X1 2 Output Buffer Clock Synthesis Circuitry Output Buffer Output Buffer Output Buffer Crystal Oscillator X2 Output Buffer Output Enable (all outputs) 1 Revision 041499 Printed 11/15/00 Integrated Circuit Systems • 525 Race Street • San Jose •CA•95126• (408) 295-9800tel • (408) 295-9818fax MDS 650-01B A ICS650-01B System Peripheral Clock Source Pin Assignment BSEL X2 X1 VDD GND GND BCLK1 BCLK2 ACLK PCLK4 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 PSEL1 PSEL0 PCLK2 PCLK3 VDD ASEL GND 14.
318M PCLK1 OE Processor Clock (MHz) PSEL1 PSEL0 PCLK1 PCLK2,3 PCLK4 0 0 25.
00 50.
00 18.
75 0 M TES...

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