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ICS9250-08

Integrated Circuit Systems
Part Number ICS9250-08
Manufacturer Integrated Circuit Systems
Description Frequency Generator & Integrated Buffers
Published Dec 11, 2005
Detailed Description Integrated Circuit Systems, Inc. ICS9250-08 Frequency Generator & Integrated Buffers for Celeron & PII/III™ Recommende...
Datasheet PDF File ICS9250-08 PDF File

ICS9250-08
ICS9250-08

Overview
Integrated Circuit Systems, Inc.
ICS9250-08 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: min = 1ns max = 4ns • PCI – PCI: <250ps • SDRAM - SDRAM: <500ps Pin Configuration VDDREF *FS2/REF1 *PCI_STOP/REF0 GND X1 X2 VDDPCI *MODE/PCICLK_F **FS3/PCICLK0 GND PCICLK1 PCICLK2 PCICLK3 PCICLK4 VDDPCI PCICLK5 BUFFERIN SDRAM11 SDRAM10 VDDSDR SDRAM9 SDRAM8 GND SDRAM15 SDRAM14 GND SDATA 2 I C SCLK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 VDDLIOAPIC IOAPIC0 IOAPIC_F GND CPUCLK_F CPUCLK1 VDDLCPU CPUCLK2 GND CPU_STOP# SDRAM_F VDDSDR SDRAM0 SDRAM1 GND SDRAM2 SDRAM3 SDRAM4 SDRAM5 VDDSDR SDRAM6 SDRAM7 GND SDRAM12 SDRAM13 VDD48 24MHz/FS0* 48MHz/FS1* { 56-Pin SSOP Block Diagram PLL2 ÷2 * Internal Pull-up Resistor of 240K to 3.
3V on indicated inputs ** Internal Pull-down resistor of 240K to GND on indicated inputs.
48MHz 24MHz IOAPIC_F 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.
3 133 112 103 66.
8 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) X1 X2 XTAL OSC STOP IOAPIC0 2 REF [1:0...


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