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W166 Datasheet

  • W166

  • Spread Spectrum Frequency Timing Generator

  • 7頁(yè)

  • CYPRESS

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W166
Spread Spectrum Frequency Timing Generator
Features
鈥?Maximized EMI suppression using Cypress鈥檚 Spread
Spectrum technology
鈥?Generates a spread spectrum copy of the provided
input
鈥?Selectable spreading characteristics
鈥?Integrated loop filter components
鈥?Operates with a 3.3V or 5V supply
鈥?SSON# pin enables frequency spreading
鈥?Low power CMOS design
鈥?Available in 8-pin SOIC (Small Outline Integrated
Circuit)
is greatly reduced. Use of this technology allows systems to
pass increasingly difficult EMI testing without resorting to cost-
ly shielding or redesign.
In a system, not only is EMI reduced in the various clock lines,
but also in all signals which are synchronized to the clock.
Therefore, the benefits of using this technology increase with
the number of address and data lines in the system. The Sim-
plified Block Diagram shows a simple implementation.
Table 1. Frequency Spread Selection
W166
FS1
0
0
The W166 incorporates the latest advances in PLL spread
spectrum frequency synthesizer techniques. By frequency
modulating the output with a low-frequency carrier, peak EMI
1
1
FS0
0
1
0
1
Input
Frequency
(MHz)
50 to 65
50 to 65
50 to 65
50 to 65
Output
Frequency (MHz)
f
IN
鹵0.625%
f
IN
鹵1.25%
f
IN
鹵2.5%
f
IN
鈥?.75%
Overview
Simplified Block Diagram
3.3V or 5V
Pin Configuration
Oscillator or Reference
Input
CLKIN
NC
GND
FS1
1
2
3
4
8
7
6
5
SSON#
CLKOUT
FS0
VDD
W166
W166
Spread Spectrum
Output
(EMI suppressed)
Cypress Semiconductor Corporation
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
鈥?/div>
CA 95134 鈥?/div>
408-943-2600
December 20, 1999, rev. **

W166相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠(chǎng)商
    下載
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS
  • 英文版
    Spread Spectrum Frequency Timing Generator
    CYPRESS [C...
  • 英文版
    Miscellaneous Clock Generator
    ETC

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