5秒后页面跳转
W149_02 PDF预览

W149_02

更新时间: 2024-10-28 03:18:07
品牌 Logo 应用领域
赛普拉斯 - CYPRESS /
页数 文件大小 规格书
16页 153K
描述
440BX AGPset Spread Spectrum Frequency Synthesizer

W149_02 数据手册

 浏览型号W149_02的Datasheet PDF文件第2页浏览型号W149_02的Datasheet PDF文件第3页浏览型号W149_02的Datasheet PDF文件第4页浏览型号W149_02的Datasheet PDF文件第5页浏览型号W149_02的Datasheet PDF文件第6页浏览型号W149_02的Datasheet PDF文件第7页 
W149  
440BX AGPset Spread Spectrum Frequency Synthesizer  
VDDQ3:.....................................................................3.3V±5%  
Features  
VDDQ2:.....................................................................2.5V±5%  
• Maximized EMI suppression using Cypress’s Spread  
Spectrum Technology  
SDRAMIN to SDRAM0:12 Delay:..........................3.7 ns typ.  
• Single chip system frequency synthesizer for Intel®  
Table 1. Mode Input Table[1]  
440BX AGPset  
Two copies of CPU output  
Six copies of PCI output  
One 48-MHz output for USB  
Mode  
Pin 2  
PCI_STOP#  
REF0  
0
1
One 24-MHz output for SIO  
Two buffered reference outputs  
One IOAPIC output  
Thirteen SDRAM outputs provide support for 3 DIMMs  
Spread Spectrum feature always enabled  
SMBus interface for programming  
Power management control inputs  
Smooth CPU frequency switching from 66.8124 MHz  
Table 2. Pin Selectable Frequency  
Input Address  
CPU0:1  
(MHz)  
PCI_F, 1:5  
(MHz)  
FS2 FS1 FS0  
Spread%  
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
100  
33.3 (CPU/3)  
(Reserved)  
0.5  
100  
103  
66.8  
83.3  
66.8  
124  
33.3 (CPU/3)  
34.3 (CPU/3)  
33.4 (CPU/2)  
41.7 (CPU/2)  
33.4 (CPU/2)  
41.3 (CPU/3)  
±0.5  
0.5  
0.5  
0.5  
±0.5  
0.5  
Key Specifications  
CPU Cycle-to-Cycle Jitter: ......................................... 250 ps  
CPU to CPU Output Skew: ........................................ 175 ps  
PCI to PCI Output Skew: ............................................ 500 ps  
[2]  
Logic Block Diagram  
Pin Configuration  
VDDQ3  
VDDQ3  
REF0/(PCI_STOP#)  
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  
48  
VDDQ2  
IOAPIC  
REF1/FS2*  
GND  
CPU0  
CPU1  
VDDQ2  
OE  
SDRAM12  
GND  
SDRAM0  
SDRAM1  
VDDQ3  
SDRAM2  
SDRAM3  
GND  
SDRAM4  
SDRAM5  
VDDQ3  
SDRAM6  
SDRAM7  
VDDQ3  
48MHz/FS0*  
24MHz/FS1*  
REF0/(PCI_STOP#)  
REF1/FS2  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
X1  
X2  
XTAL  
OSC  
X1  
X2  
PLL Ref Freq  
VDDQ3  
PCI_F/MODE  
PCI1  
VDDQ2  
IOAPIC  
I/O Pin  
Control  
GND  
PCI2  
PCI3  
PCI4  
VDDQ2  
PCI5  
VDDQ3  
SDRAMIN  
GND  
CPU0  
CPU1  
PLL 1  
SDRAM11  
SDRAM10  
VDDQ3  
SDRAM9  
SDRAM8  
GND  
÷2/÷3  
VDDQ3  
PCI_F/MODE  
PCI1  
PCI2  
SDATA  
SCLK  
Stop  
Clock  
SMBus  
{
PCI3  
Control  
PCI4  
PCI5  
SDATA  
SCLK  
SMBus  
Logic  
VDDQ3  
48MHz/FS0  
PLL2  
÷2  
24MHz/FS1  
VDDQ3  
SDRAM0:12  
SDRAMIN  
13  
Intel is a registered trademark of Intel Corporation.  
Notes:  
1. Mode input latched at power-up.  
2. Internal pull up resistors(*) should not be relied upon for setting I/O pins HIGH. Pin function with parentheses determined by MODE pin resistor strapping.  
Cypress Semiconductor Corporation  
3901 North First Street  
San Jose  
CA 95134  
408-943-2600  
Document #: 38-07176 Rev. *A  
Revised December 22, 2002  

与W149_02相关器件

型号 品牌 获取价格 描述 数据表
W149H ETC

获取价格

CPU System Clock Generator
W149HT CYPRESS

获取价格

Processor Specific Clock Generator, 124MHz, CMOS, PDSO48, 0.300 INCH, SSOP-48
W14B NSC

获取价格

14 Lead Ceramic Flatpack NS Package Number W14B
W15 ETC

获取价格

15 Watt - Single Output Regulated Power Supplies
W-15 ETC

获取价格

Fuse
W150 SPECTRALINEAR

获取价格

440BX AGPset Spread Spectrum Frequency Synthesizer
W150 CYPRESS

获取价格

440BX AGPset Spread Spectrum Frequency Synthesizer
W150_03 CYPRESS

获取价格

440BX AGPset Spread Spectrum Frequency Synthesizer
W150258-200TB 3M

获取价格

HEADER CONNECTOR,PCB MNT,PLUG,58 CONTACTS,SKT,0.079 PITCH
W150258-202TH 3M

获取价格

HEADER CONNECTOR,PCB MNT,PLUG,58 CONTACTS,SKT,0.079 PITCH