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ICS9250-25 fiches techniques PDF

Integrated Circuit Systems - Frequency Generator & Integrated Buffers for Celeron & PII/III

Numéro de référence ICS9250-25
Description Frequency Generator & Integrated Buffers for Celeron & PII/III
Fabricant Integrated Circuit Systems 
Logo Integrated Circuit Systems 





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ICS9250-25 fiche technique
Integrated
Circuit
Systems, Inc.
ICS9250-25
Preliminary Product Preview
Frequency Generator & Integrated Buffers for Celeron & PII/III
Recommended Application:
810/810E and Solano type chipset
Output Features:
• 2 - CPUs @ 2.5V, up to 153.33MHz.
• 13 - SDRAM @ 3.3V, up to 153.33MHz.
• 3 - 3V66 @ 3.3V, 2x PCI MHz.
• 8 - PCI @3.3V.
• 1 - 48MHz, @3.3V fixed.
• 1 - 24MHz @ 3.3V
• 1 - REF @3.3V, 14.318MHz.
Features:
• Up to 153.33MHz frequency support
• Support power management through PD#.
• Spread spectrum for EMI control (± 0.25%)
center spread.
• Uses external 14.318MHz crystal
• FS pins for frequency select
Key Specifications:
• CPU Output Jitter: <250ps
• IOAPIC Output Jitter: <500ps
• 48MHz, 3V66, PCI Output Jitter: <500ps
• Ref Output Jitter. <1000ps
• CPU Output Skew: <175ps
• PCI Output Skew: <500ps
• 3V66 Output Skew <175ps
• For group skew timing, please refer to the
Group Timing Relationship Table.
Pin Configuration
VDDREF
X1
X2
GNDREF
GND3V66
3V66-0
3V66-1
3V66-2
VDD3V66
VDDPCI
1*FS0/PCICLK0
1*FS1/PCICLK1
PCICLK2
GNDPCI
PCICLK3
PCICLK4
PCICLK5
VDDPCI
PCICLK6
PCICLK7
GNDPCI
PD#
SCLK
SDATA
VDDSDR
SDRAM11
SDRAM10
GNDSDR
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 REF0/FS4*1
55 VDDLAPIC
54 IOAPIC
53 VDDLCPU
52 CPUCLK0
51 CPUCLK1
50 GNDLCPU
49 GNDSDR
48 SDRAM0
47 SDRAM1
46 SDRAM2
45 VDDSDR
44 SDRAM3
43 SDRAM4
42 SDRAM5
41 GNDSDR
40 SDRAM6
39 SDRAM7
38 SDRAM_F
37 VDDSDR
36 GND48
35 24MHz/FS2*
34 48MHz/FS3*1
33 VDD48
32 VDDSDR
31 SDRAM8
30 SDRAM9
29 GNDSDR
56-Pin 300 mil SSOP
1. These pins will have 1.5 to 2X drive strength.
* 120K ohm pull-up to VDD on indicated inputs.
Block Diagram
PLL2
X1 XTAL
X2 OSC
PLL1
Spread
Spectrum
FS[4:0]
PD#
SDATA
SCLK
Control
Logic
Config.
Reg.
/2
CPU
DIVDER
SDRAM
DIVDER
IOAPIC
DIVDER
PCI
DIVDER
3V66
DIVDER
48MHz
24MHz
REF0
2 CPUCLK [1:0]
12 SDRAM [11:0]
SDRAM_F
IOAPIC
PCICLK [7:0]
8
3V66 [2:0]
3
9250-25 Rev A 10/03/00
Third party brands and names are the property of their respective owners.
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.

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