- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄363868 > W149 (CYPRESS SEMICONDUCTOR CORP) 440BX AGPset Spread Spectrum Frequency Synthesizer(440BX AG裝置寬頻譜頻率合成器) PDF資料下載
參數(shù)資料
| 型號(hào)： | W149 |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | 440BX AGPset Spread Spectrum Frequency Synthesizer(440BX AG裝置寬頻譜頻率合成器) |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, PDSO48 |
| 封裝： | 0.300 INCH, SSOP-48 |
| 文件頁(yè)數(shù)： | 1/14頁(yè) |
| 文件大小： | 167K |
| 代理商： | W149 |
當(dāng)前第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)
440BX AGPset Spread Spectrum Frequency Synthesizer
W149
Cypress Semiconductor Corporation
3901 North First Street
San Jose
CA 95134
408-943-2600
October 18, 1999, rev. **
Features
Maximized EMI suppression using Cypress’s Spread
Spectrum Technology
Single chip system frequency synthesizer for Intel
440BX AGPset
Two copies of CPU output
Six copies of PCI output
One 48-MHz output for USB
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
I
2
C interface for programming
Power management control inputs
Smooth CPU frequency switching from 66.8–124 MHz
Key Specifications
CPU Cycle-to-Cycle Jitter: ......................................... 250 ps
CPU to CPU Output Skew: ........................................ 175 ps
PCI to PCI Output Skew: ............................................ 500 ps
V
DDQ3
:.....................................................................3.3V±5%
V
DDQ2
:.....................................................................2.5V±5%
SDRAMIN to SDRAM0:12 Delay:..........................3.7 ns typ.
Table 1. Mode Input Table
[1]
Mode
0
1
Pin 2
PCI_STOP#
REF0
Table 2. Pin Selectable Frequency
Input Address
FS2
FS1
FS0
1
1
1
1
1
0
1
0
1
1
0
0
0
1
1
0
1
0
0
0
1
0
0
0
CPU0:1
(MHz)
100
PCI_F, 1:5
(MHz)
33.3 (CPU/3)
(Reserved)
33.3 (CPU/3)
34.3 (CPU/3)
33.4 (CPU/2)
41.7 (CPU/2)
33.4 (CPU/2)
41.3 (CPU/3)
Spread
%
–0.5
100
103
66.8
83.3
66.8
124
±0.5
–0.5
–0.5
–0.5
±0.5
–0.5
Intel is a registered trademark of Intel Corporation. I
2
C is a trademark of Philips 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.
Logic Block Diagram
Pin Configuration
[2]
VDDQ3
REF0/(PCI_STOP#)
REF1/FS2
VDDQ2
CPU0
PCI_F/MODE
PCI1
XTAL
OSC
PLL Ref Freq
PLL 1
X2
X1
VDDQ3
CStop
PCI2
PCI3
PCI4
48MHz/FS0
VDDQ3
PLL2
÷2/÷3
VDDQ2
VDDQ3
IOAPIC
PCI5
I
2
C
Logic
SCLK
I/O Pin
Control
SDRAM0:12
SDRAMIN
13
CPU1
÷2
VDDQ3
REF0/(PCI_STOP#)
GND
X1
X2
VDDQ3
PCI_F/MODE
PCI1
GND
PCI2
PCI3
PCI4
PCI5
VDDQ3
SDRAMIN
GND
SDRAM11
SDRAM10
VDDQ3
SDRAM9
SDRAM8
I
2
C
{
GND
SDATA
SCLK
W
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*
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W14B | FP 1/8 ASST 6 IN PC 10 PK/BOX RoHS Compliant: Yes |
| W150 | 440BX AGPset Spread Spectrum Frequency Synthesizer(440BX AGP裝置寬頻譜頻率合成器) |
| W152 | Spread Aware Eight Output Zero Delay Buffer( 八輸出零延遲緩沖器) |
| W155 | Spread Spectrum Frequency Timing Generator(寬頻譜頻率定時(shí)發(fā)生器) |
| W156C | Spread Spectrum FTG for VIA MVP4(應(yīng)用于VIA MVP4的寬頻譜FTG) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W149_02 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:440BX AGPset Spread Spectrum Frequency Synthesizer |
| W149E11 | 制造商:OMRON INDUSTRIAL AUTOMATION 功能描述:C1000HF PLC Operation Manual |
| W149H | 制造商:Cypress Semiconductor 功能描述: |
| W149HT | 制造商:Cypress Semiconductor 功能描述: |
| W14B | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:14 Lead Ceramic Flatpack NS Package Number W14B |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。