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ICS9250-10

Part Number	ICS9250-10
Manufacturer	Integrated Circuit Systems
Description	Frequency Timing Generator
Published	Dec 11, 2005
Detailed Description	Integrated Circuit Systems, Inc. ICS9250-10 Preliminary Product Preview Frequency Timing Generator for Pentium II Syst...
Datasheet	ICS9250-10 PDF File

Overview

Integrated Circuit Systems, Inc.
ICS9250-10 Preliminary Product Preview Frequency Timing Generator for Pentium II Systems General Description The ICS9250-10 is a single chip clock for Intel Pentium II.
It provides all necessary clock signals for such a system.
Spread spectrum may be enabled through I2C programming.
Spread spectrum typically reduces EMI by 8dB to 10 dB.
This simplifies EMI qualification without resorting to board design iterations or costly shielding.
The ICS9250-10 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations.
Features Generates the following system clocks: - 3 CPU (2.
5V) 66.
6/100 MHz (up to 133MHz through I2C selection) - 9 SDRAM (3.
3V) up to 133MHz - 8 PCI (3.
3 V) @33.
3MHz - 2 IOAPIC (2.
5V) @16.
67 or 33.
3MHz - 2 Hublink clocks (3.
3 V) @ 66.
6 MHz - 2 USB (3.
3V) @ 48 MHz ( Non spread spectrum) - 1 REF (3.
3V) @ 14.
318 MHz Supports spread spectrum modulation , down spread 0 to -0.
5% I2C support for power management Efficient power management scheme through PD# Uses external 14.
138 MHz crystal Block Diagram Pin Configuration 56-Pin 300 mil SSOP *60K ohm pull-up to VDD on indicated inputs.
Power Groups VDD0, GND0 = REF & Crystal VDD1, GND1 = 3V66 [1:0] VDD2, GND2 = PCICLK[7:0] VDD3, GND3 = PLL core VDD4, GND4 = 48MHz [1:0] VDD5, GND5 = SDRAM_F, SDRAM [7:0] VDDL0, GNDL0 = CPUCLK [2:0] VDDL1, GNDL1 = IOAPIC [1:0] PRODUCT PREVIEW documents contain information on new products in the sampling or preproduction phase of development.
Characteristic data and other specifications are subject to change without notice.
Pentium II is a trademark of Intel Corporation I2C is a trademark of Philips Corporation 9250-10 Rev J 6/15/99 ICS9250-10 Preliminary Product Preview Pin Descriptions PIN NUMBER P I N NA M E FREQ_APIC REF0 3 4 5, 6, 14, 17, 23, 24, 35, 41, 47 8, 7 X1 X2 GND (0:5) 3V66 [1:0] TYPE IN OUT IN OUT PWR OUT PWR OUT OUT IN IN IN IN OUT OUT PWR OUT PWR...

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