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9250YF-27LF-T PDF预览

9250YF-27LF-T

更新时间: 2024-02-07 10:56:23
品牌 Logo 应用领域
艾迪悌 - IDT /
页数 文件大小 规格书
15页 196K
描述
Frequency Generator and Integrated Buffers for Celeron & PII/IIITM

9250YF-27LF-T 数据手册

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DATASHEET  
Frequency Generator and Integrated Buffers  
for Celeron & PII/IIITM  
ICS9250-27  
Pin Configuration  
Recommended Application:  
810/810E and 815 type chipset.  
*FS2//REF0  
VDD  
1
2
56  
GND  
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  
IOAPIC0  
IOAPIC1  
VDDL  
CPUCLK0  
VDDL0  
CPUCLK1  
CPUCLK2  
GNDL  
X1  
X2  
GND  
GND  
3V66-0  
3V66-1  
3V66-2  
VDD  
3
4
5
6
7
8
9
Output Features:  
3 CPU (2.5V) (up to 133MHz achievable through I2C)  
9 SDRAM (3.3V) (up to 133MHz achievable  
through I2C)  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
GND  
VDD  
SDRAM0  
SDRAM1  
VDD  
SDRAM2  
SDRAM3  
GND  
SDRAM4  
SDRAM5  
VDD  
SDRAM6  
SDRAM7  
GND  
SDRAM_F  
VDD  
PD#  
SCLK  
SDATA  
FS1  
7 PCI (3.3 V) @33.3MHz  
2 IOAPIC (2.5V) @ 33.3 MHz  
3 Hublink clocks (3.3 V) @ 66.6 MHz  
2 (3.3V) @ 48 MHz (Non spread spectrum)  
1 REF (3.3V) @ 14.318 MHz  
PCICLK_F  
PCICLK0  
GND  
PCICLK1  
PCICLK2  
GND  
PCICLK3  
PCICLK4  
PCICLK5  
VDD  
Features:  
VDD  
GND  
GND  
Supports spread spectrum modulation,  
0 to -0.5% down spread.  
48MHz_0  
48MHz_1  
VDD  
I2C support for power management  
Efficient power management scheme through PD#  
Uses external 14.138 MHz crystal  
Alternate frequency selections available through I2C  
control.  
FS0  
56-Pin 300mil SSOP  
* This input has a 50Kpull-down to GND.  
Block Diagram  
Functionality  
X1  
X2  
XTAL  
OSC  
REF0  
FS2  
FS1  
FS0  
Function  
PLL1  
Spread  
Spectrum  
X
X
0
0
0
1
Tristate  
Test  
Active CPU = 66MHz  
SDRAM = 100MHz  
/2  
/3  
0
0
1
1
1
1
1
1
0
1
0
1
VDDL  
CPU66/100/133 (2:0)  
3
3
8
Active CPU = 100MHz  
SDRAM = 100MHz  
3V66 (2:0)  
FS (2:0)  
PD#  
Control  
Logic  
Active CPU = 133MHz  
SDRAM = 133MHz  
SDRAM (7:0)  
SDRAM_F  
Active CPU = 133MHz  
SDRAM = 100MHz  
SDATA  
SCLK  
PCICLK (5:0)  
PCICLK_F  
/2  
6
2
Config  
Reg  
IOAPIC (1:0)  
VDDL  
/2  
Power Groups  
PLL2  
48MHz (1:0)  
AVDD = Pin 22 Analog power for PLL  
AGND = Pin 23 Analog ground  
VDD48 = Pin 27 Analog power for 48MHz PLL  
GND = Pin 24 Analog ground for 48MHz PLL  
2
IDTTM Frequency Generator and Integrated Buffers for Celeron & PII/IIITM  
0395F—01/25/10  
1

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