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參數(shù)資料
| 型號(hào)： | W42C31-04 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | Spread Spectrum Frequency Timing Generator(寬頻譜頻率同步產(chǎn)生器) |
| 中文描述： | 擴(kuò)頻頻率定時(shí)發(fā)生器（寬頻譜頻率同步產(chǎn)生器） |
| 文件頁數(shù)： | 5/6頁 |
| 文件大小： | 136K |
| 代理商： | W42C31-04 |
W42C31-04
5
Application Information
Recommended Circuit Configuration
For optimum performance in system applications the power
supply decoupling scheme shown in
Figure 4
should be used.
V
DD
decoupling is important to both reduce phase jitter and
EMI radiation. The 0.1-
μ
F decoupling capacitor should be
placed as close to the V
DD
pin as possible, otherwise the in-
creased trace inductance will negate its decoupling capability.
The 10-
μ
F decoupling capacitor shown should be a tantalum
type. For further EMI protection, the V
DD
connection can be
made via a ferrite bead, as shown.
The 6-pF XTAL load capacitors can be used to raise the inte-
grated 17-pF capacitance up to a total load of 20 pF on the
crystal.
Recommended Board Layout
Figure 5
shows a recommended 2-layer board layout.
Document #: 38-00801
Figure 4. Recommended Circuit Configuration
GND
W
8
7
6
5
1
2
3
4
C1
6 pF
C2
6 pF
XTAL1
Output
R1
C3
0.1 μF
FB
C4
10 μF Tantalum
5V System Supply
VDD
Ordering Information
Ordering Code
W42C31
Freq. Mask
Code
04
Package
Name
G
Package Type
8-pin Plastic SOIC (150-mil)
Figure 5. Recommended Board Layout (2-Layer Board)
C1
C2
Optional Guard Ring for
XTAL Oscillator Circuitry
Clock Output
XTAL1
is not required for operation).
Typical value is 6 pF.
High frequency supply decoupling
capacitor (0.1-μF recommended).
Common supply low frequency
decoupling capacitor (10-μF tantalum
recommended).
Match value to line impedance
XTAL load capacitors (optional; use
FB
Ferrite Bead
C1, C2 =
C3 =
C4 =
R1 =
=
R1
C3
C4
G
G
G
G
G
G
FB
Power Supply Input
(5V)
=
Via To GND Plane
G
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W42C31-04G | 制造商:Cypress Semiconductor 功能描述:Logic and Timing, Spread Spectrum Frequency Timing Generator 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| W42C31-04GT | 制造商:Cypress Semiconductor 功能描述:Logic and Timing, Spread Spectrum Frequency Timing Generator |
| W42C31-06 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Spread Spectrum Frequency Timing Generator |
| W42C31-06G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Clock Driver |
| W42C31-09 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Spread Spectrum Frequency Timing Generator |
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