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ICS9248YF-138 PDF预览

ICS9248YF-138

更新时间： 2024-11-12 22:09:47
品牌 Logo 应用领域
矽成 - ICSI /
页数 文件大小 规格书
12页 246K
描述
Frequency Generator & Integrated Buffers for Celeron & PII/III⑩

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ICS9248YF-138 数据手册

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ICS9248-138  
Integrated  
Circuit  
Systems, Inc.  
Preliminary Product Preview  
Frequency Generator & Integrated Buffers for Celeron & PII/III™  
Recommended Application:  
Pin Configuration  
810/810E and Solano type chipsetꢀ  
1*SEL24_48#/REF0  
VDDREF  
X1  
1
2
48  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
VDDLAPIC  
IOAPIC1  
Output Features:  
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
VDDLCPU  
CPUCLK0  
CPUCLK1  
GNDLCPU  
GNDSDR  
SDRAM0  
SDRAM1  
SDRAM2  
VDDSDR  
SDRAM3  
SDRAM4  
SDRAM5  
GNDSDR  
SDRAM6  
SDRAM7  
SDRAM_F  
VDDSDR  
GND48  
•
•
•
•
•
•
•
•
2- CPUs @ 2.5V  
X2  
9 - SDRAM @ 3.3V, including 1 free running  
7 - PCICLK @ 3.3V  
GNDREF  
GND3V66  
3V66-0  
3V66-1  
3V66-2  
1 - IOAPIC @ 2.5V,  
3 - 3V66MHz @ 3.3V  
2 - 48MHz, @ 3.3V fixed.  
1 - 24/48MHz, @3.3V selectable by I2C  
1 - REF @v3.3V, 14.318MHz.  
VDD3V66  
VDDPCI  
1*FS0/PCICLK0  
1**FS1/PCICLK1  
GNDPCI  
PCICLK2  
PCICLK3  
PCICLK4  
VDDPCI  
PCICLK5  
PCICLK6  
GNDPCI  
PD#  
Features:  
•
•
•
Up to 200MHz frequency support  
Support FS0-FS4 strapping status bit for I2C read back.  
Support power management: Through Power down  
Mode from I2C programming.  
24_48MHz/FS2**  
48MHz/FS3*  
48MHz/FS4*1  
VDD48  
•
•
Spread spectrum for EMI control ( ± 0.25% center).  
Uses external 14.318MHz crystal  
SCLK  
SDATA  
Skew Specifications:  
•
•
•
•
•
CPU – CPU: <175ps  
48-Pin 300mil SSOP  
* These inputs have a 120K pull up to VDDꢀ  
** These inputs have a 120K pull down to GNDꢀ  
1 These are double strengthꢀ  
SDRAM - SDRAM: < 250ps  
3V66 – 3V66: <175ps  
PCI – PCI: <500ps  
For group skew specifications, please refer to group  
timing relationship.  
Functionality  
CPU  
(MHz)  
66.67  
66.87  
68.67  
SDRAM  
(MHz)  
100.00  
100.30  
103.00  
107.00  
100.00  
100.30  
103.00  
107.00  
133.33  
133.73  
137.33  
120.00  
100.00  
100.30  
103.00  
90.00  
3V66  
(MHz)  
66.67  
66.87  
68.67  
71.34  
66.67  
66.87  
68.67  
71.34  
66.67  
66.87  
68.67  
60.00  
66.67  
66.87  
68.67  
60.00  
PCICLK  
(MHz)  
33.33  
33.43  
34.33  
35.66  
33.33  
33.43  
34.33  
35.66  
33.33  
33.43  
34.33  
30.00  
33.33  
33.43  
34.33  
30.00  
IOAPIC  
(MHz)  
16.67  
16.72  
17.16  
17.83  
16.67  
16.72  
17.17  
17.84  
16.67  
16.72  
17.17  
15.00  
16.67  
16.72  
17.17  
15.00  
FS4 FS3 FS2 FS1 FS0  
Block Diagram  
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
PLL2  
48MHz [1:0]  
24_48MHz  
2
71.34  
/ 2  
100.00  
100.30  
103.00  
107.00  
133.33  
133.73  
137.33  
120.00  
133.33  
133.73  
137.33  
120.00  
X1  
X2  
XTAL  
OSC  
REF0  
PLL1  
Spread  
Spectrum  
CPU  
DIVDER  
CPUCLK [1:0]  
2
8
SDRAM  
DIVDER  
SDRAM [7:0]  
SDRAM_F  
IOAPIC  
SEL24_48#  
IOAPIC  
DIVDER  
Control  
Logic  
SDATA  
SCLK  
PCI  
DIVDER  
PCICLK [6:0]  
3V66 [2:0]  
7
FS[4:0]  
PD#  
1
1
1
1
1
1
1
1
0
1
0
1
1
0
1
1
0
1
1
0
160.00  
160.00  
166.67  
166.67  
160.00  
120.00  
166.67  
125.00  
80.00  
80.00  
83.34  
83.34  
40.00  
40.00  
41.67  
41.67  
20.00  
20.00  
20.84  
20.84  
Config.  
Reg.  
3V66  
DIVDER  
3
Additional frequencies selectable through I2C programmingꢀ  
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.  
9248- 138 Rev A 10/03/00  
Third party brands and names are the property of their respective owners.  
1234567...12

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