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ICS9248-98 PDF预览

ICS9248-98

更新时间： 2024-11-10 22:55:27
品牌 Logo 应用领域
矽成 - ICSI /
页数 文件大小 规格书
15页 507K
描述
Frequency Generator & Integrated Buffers for Celeron & PII/III⑩

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中文翻译

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ICS9248-98 数据手册

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Integrated  
Circuit  
Systems, Inc.  
ICS9248-98  
Frequency Generator & Integrated Buffers for Celeron & PII/III™  
Recommended Application:  
440BX/VIA Apollo 133 style chipset.  
Pin Configuration  
Output Features:  
48  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
VDD1  
*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  
VDDL1  
IOAPIC  
•
•
•
•
•
•
•
2 - CPUs @2.5V, up to 166MHz.  
1 - IOAPIC @ 2.5V  
13 - SDRAM @ 3.3V  
6 - PCI @3.3V,  
1 - 48MHz, @3.3V fixed.  
1 - 24MHz @ 3.3V  
2 - REF @3.3V, 14.318MHz.  
REF1/FS2*  
GND  
CPUCLK_F  
CPUCLK1  
VDDL2  
CLK_STOP#*  
SDRAM_F  
GND  
SDRAM0  
SDRAM1  
VDD3  
SDRAM2  
SDRAM3  
GND  
SDRAM4  
SDRAM5  
VDD3  
SDRAM6  
SDRAM7  
VDD4  
48MHz/FS0*  
24MHz/FS1*  
X1  
X2  
VDD2  
*MODE/PCICLK_F  
**FS3/PCICLK0  
GND  
PCICLK1  
PCICLK2  
PCICLK3  
PCICLK4  
VDD2  
BUFFER IN  
GND  
SDRAM11  
SDRAM10  
VDD3  
SDRAM9  
SDRAM8  
GND  
SDATA  
SCLK  
Features:  
•
•
•
•
Up to 166MHz frequency support  
Support power management: PCI, CPU stop and Mode  
Spread spectrum for EMI control (0 to -0.5%, ± 0.25%).  
Uses external 14.318MHz crystal  
Skew Specifications:  
•
•
•
•
•
CPU – CPU: <175ps  
SDRAM - SDRAM: <250ps  
PCI – PCI: <500ps  
BUFFER_IN-SDRAM: <5ns  
CPU(early)-PCI: Min=1.0ns, Typ=2.3ns, Max=4.0ns  
48-Pin 300mil SSOP  
*
Internal Pull-up Resistor of 120K to VDD  
** Internal Pull-down resistor of 120K to GND  
Block Diagram  
Functionality  
CPU  
(MHz)  
80.00  
75.00  
83.31  
PCICLK  
(MHz)  
40.00  
37.50  
41.65  
33.41  
34.33  
37.34  
34.01  
33.41  
40.00  
38.33  
36.66  
35.00  
35.00  
37.50  
31.00  
33.25  
FS3  
FS2  
FS1  
FS0  
PLL2  
48MHz  
24MHz  
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
/2  
X1  
X2  
XTAL  
OSC  
STOP  
IOAPIC  
66.82  
BUFFER IN  
REF(1:0)  
2
103.00  
112.01  
68.01  
CPUCLK_F  
CPUCLK 1  
PLL1  
Spread  
Spectrum  
STOP  
STOP  
100.23  
120.00  
114.99  
109.99  
105.00  
140.00  
150.00  
124.00  
132.99  
4
FS(3:0)  
MODE  
SDRAM (11:0)  
SDRAM_F  
LATCH  
POR  
12  
4
PCI  
CLOCK  
DIVDER  
CLK_STOP#  
PCI_STOP#  
STOP  
PCICLK (4:0)  
PCICLKF  
5
Control  
Logic  
SDATA  
SCLK  
Config.  
Reg.  
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  
9248-98 Rev D 11/6/00  
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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