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ICS9248-195 PDF预览

ICS9248-195

更新时间: 2024-09-25 04:44:23
品牌 Logo 应用领域
矽成 - ICSI /
页数 文件大小 规格书
16页 148K
描述
Frequency Generator & Integrated Buffers for PENTIUM II/III & K6

ICS9248-195 数据手册

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ICS9248-195  
Integrated  
Circuit  
Systems, Inc.  
Frequency Generator & Integrated Buffers for PENTIUM II/IIITM  
& K6  
RecommendedApplication:  
KeySpecifications:  
CPU Output Jitter @ 2.5V: <300ps  
CPU Output Jitter @ 3.3V: <250ps  
PCI Output Jitter @ 3.3V: <250ps  
CPU Output Skew @ 2.5V: <175ps  
CPU Output Skew @ 3.3V: <175ps  
PCI Output Skew @ 3.3V: <500ps  
440BX, MX, VIA PM/PL/PLE 133 style chip set, with  
Coppermine orTualatin processor, for note book  
applications.  
OutputFeatures:  
4 - CPUs @ 2.5V/3.3V  
including 1 free running CPUCLK_F  
PCI Early to PCI Skew @ 3.3V: typ = 3ns  
SDRAM Output Skew @ 3.3V: <500ps  
9 - SDRAM @ 3.3V  
7 - PCI @ 3.3V, including 1 free running PCICLK_F  
1 - PCI Early @ 3.3V  
1 - 48MHz, @ 3.3V fixed.  
1 - 24/48MHz @ 3.3V  
2 - REF @3.3V, 14.318MHz.  
Pin Configuration  
48  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
VDDREF  
*SPREAD/REF0  
GNDREF  
X1  
1
2
REF1/FS2*  
VDDLCPU  
CPUCLK_F  
CPUCLK0  
GNDLCPU  
CPUCLK1  
CPUCLK2  
CLK_STOP#  
GNDSDR  
SDRAM_F  
SDRAM0  
SDRAM1  
VDDSDR  
SDRAM2  
SDRAM3  
GNDSDR  
SDRAM4  
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
X2  
VDDPCI  
Features:  
*CPU2.5_3.3#/PCICLK_F  
*FS3/PCICLK0  
GNDPCI  
*SEL24_48#/PCICLK1  
*SELPCIE_6#/PCICLK2  
PCICLK3  
Up to 137MHz frequency support  
97MHz to support high-end AMD processor.  
Support power management:CLK, PCI, stop and  
Power down Mode from I2C programming.  
PCICLK4  
VDDPCI  
BUFFER IN  
GNDPCI  
Spread spectrum for EMI control  
Uses external 14.318MHz crystal  
FS pins for frequency select  
PCICLK5  
PCICLK6/PCICLK_E  
VDDCOR  
PCI_STOP#  
*Vtt_PWRGD/PD#  
GND48  
SDRAM5  
VDDSDR  
SDRAM6  
SDRAM7  
VDD48  
SDATA  
SCLK  
48MHz/FS0*  
24_48MHz/FS1*  
48-Pin SSOP and TSSOP  
* Internal Pull-up Resistor of 120K to VDD  
Block Diagram  
Functionality  
Bit2  
0
Bit6  
0
Bit5  
0
Bit4  
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
CPUCLK  
66.67  
100.00  
66.67  
133.33  
66.67  
100.00  
100.00  
133.33  
66.67  
100.00  
90.00  
133.33  
70.00  
105.00  
133.33  
140.00  
PCICLK  
33.33  
33.33  
33.33  
33.33  
33.33  
33.33  
33.33  
33.33  
33.33  
33.33  
30.00  
33.33  
35.00  
35.00  
33.33  
35.00  
0
0
0
0
0
1
0
0
1
0
1
0
0
1
0
0
1
1
0
1
1
1
0
0
1
0
0
1
0
1
1
0
1
1
1
0
1
1
0
1
1
1
1
1
1
0375D—02/02/04  

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