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ICS9250-19

Integrated Circuit Systems
Part Number ICS9250-19
Manufacturer Integrated Circuit Systems
Description Frequency Generator & Integrated Buffers
Published Dec 11, 2005
Detailed Description Integrated Circuit Systems, Inc. ICS9250-19 Frequency Generator & Integrated Buffers for Celeron & PII/III™ Recommende...
Datasheet PDF File ICS9250-19 PDF File

ICS9250-19
ICS9250-19

Overview
Integrated Circuit Systems, Inc.
ICS9250-19 Frequency Generator & Integrated Buffers for Celeron & PII/III™ Recommended Application: BX, Appollo Pro 133 type of chip set.
Output Features: • 3 - CPUs @2.
5V, up to 150MHz.
• 17 - SDRAM @ 3.
3V, up to 150MHz.
• 7 - PCI @3.
3V • 2 - IOAPIC @ 2.
5V • 1 - 48MHz, @3.
3V fixed.
• 1 - 24MHz @ 3.
3V • 2 - REF @3.
3V, 14.
318MHz.
Features: • Up to 150MHz frequency support • Support power management: CPU, PCI, stop and Power down Mode form I2C programming.
• Spread spectrum for EMI control (0 to -0.
5%, ± 0.
25%).
• Uses external 14.
318MHz crystal Key Specifications: • CPU – CPU: <175ps • CPU – PCI: 1 - 4ns • PCI – PCI: <500ps • SDRAM - SDRAM: <250ps Pin Configuration 56-Pin SSOP Block Diagram * Internal Pull-up Resistor of 240K to 3.
3V on indicated inputs ** Internal Pull-down resistor of 240K to GND on indicated inputs.
Functionality FS3 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 FS2 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 FS1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 FS0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 CPU (MHz) 133 124 150 140 105 110 115 120 100.
0 133 112 103 66.
6 83.
3 75 124 PCICLK (MHz) 33.
3 (CPU/4) 31 (CPU/4) 37.
5 (CPU/4) 35 (CPU/4) 35 (CPU/3) 36.
67 (CPU/3) 38.
33 (CPU/3) 40.
00 (CPU/3) 33.
43 (CPU/3) 44.
33 (CPU/3) 37.
33 (CPU/3) 34.
33 (CPU/2) 33.
40 (CPU/2) 41.
65 (CPU/2) 37.
5 (CPU/2) 41.
33 (CPU/2) 9250-19 Rev C 4/12/01 Third party brands and names are the property of their respective owners.
ICS reserves the right to make changes in the device data identified in this publication without further notice.
ICS advises its customers to obtain the latest version of all device data to verify that any information being relied upon by the customer is current and accurate.
ICS9250-19 Pin Configuration PIN NUMBER 2 P I N NA M E REF1 FS21 REF0 P C I _ S TO P # TYPE OUT IN OUT IN PWR IN OUT OUT IN IN OUT OUT IN IN IN OUT IN OUT IN PWR DESCRIPTION 14.
318 MHz reference clock output L a t c h e d f r e q u e n cy s e l e c t i n p u t .
H a s p u l l - u p t o V D D P ...


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