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ICS9250-18 PDF预览

ICS9250-18

更新时间： 2024-11-12 22:55:27
品牌 Logo 应用领域
矽成 - ICSI /
页数 文件大小 规格书
15页 404K
描述
Frequency Generator & Integrated Buffers for Celeron & PII/III⑩

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ICS9250-18 数据手册

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Integrated  
Circuit  
Systems, Inc.  
ICS9250-18  
Frequency Generator & Integrated Buffers for Celeron & PII/III™  
Recommended Application:  
BX, Appollo Pro 133 type of chip setꢀ  
Pin Configuration  
Output Features:  
VDDREF  
*FS2/REF1  
*PCI_STOP#/REF0  
GND  
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  
•
•
•
•
•
•
•
3 - CPUs @2.5V, up to 166MHz.  
17 - SDRAM @ 3.3V, up to 166MHz.  
7 - PCI @3.3V  
2 - IOAPIC @ 2.5V  
1 - 48MHz, @3.3V fixed.  
1 - 24MHz @ 3.3V  
X1  
X2  
VDDPCI  
*MODE/PCICLK_F  
*FS3/PCICLK0  
GND  
2 - REF @3.3V, 14.318MHz.  
PCICLK1  
PCICLK2  
PCICLK3  
PCICLK4  
VDDPCI  
PCICLK5  
BUFFERIN  
SDRAM11  
SDRAM10  
VDDSDR  
SDRAM9  
SDRAM8  
GND  
Features:  
•
•
Up to 166MHz frequency support  
Support power management: CPU, PCI, stop and Power  
down Mode form I2C programming.  
•
•
Spread spectrum for EMI control (± 0.25% center spread)  
Uses external 14.318MHz crystal  
Key Specifications:  
•
•
•
•
CPU – CPU: <175ps  
CPU – PCI: 1 - 4ns  
PCI – PCI: <500ps  
SDRAM15  
SDRAM14  
GND  
SDRAM12  
SDRAM13  
VDD48  
24MHz/FS0*  
48MHz/FSI*1  
SDRAM - SDRAM: <250ps  
SDATA  
SCLK  
I2C  
{
56-Pin SSOP  
* Internal Pull-up Resistor of 240K to 3ꢀ3V on indicated inputs  
** Internal Pull-down resistor of 240K to GND on indicated inputsꢀ  
1ꢀ This output is double strengthꢀ  
Block Diagram  
Functionality  
CPU  
(MHz)  
80.00  
75.00  
83.31  
PCICLK  
(MHz)  
40.00  
37.50  
41.65  
33.45  
34.33  
37.34  
34.01  
33.57  
40.00  
38.33  
36.66  
35.00  
35.00  
37.50  
31.00  
33.25  
FS3  
FS2  
FS1  
FS0  
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
66.9  
103.00  
112.01  
68.01  
100.7  
120.00  
114.99  
109.99  
105.00  
140.00  
150.00  
124.00  
133.9  
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  
9250-18 Rev B 9/23/99  
Third party brands and names are the property of their respective owners.  
information being relied upon by the customer is current and accurate.  
1234567...15

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