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W155

Part Number	W155
Manufacturer	Cypress Semiconductor
Description	Spread Spectrum Frequency Timing Generator
Published	Apr 17, 2005
Detailed Description	W155 Spread Spectrum Frequency Timing Generator Features • Generates a spread spectrum timing signal (SYSCLK) and a non...
Datasheet	W155 PDF File

Overview

W155 Spread Spectrum Frequency Timing Generator Features • Generates a spread spectrum timing signal (SYSCLK) and a non-spread signal (USBCLK) • Requires a 14.
318-MHz crystal for operation • Supports MIPS microprocessor clock frequencies • Reduces peak EMI by as much as 12 dB • Integrated loop filter components • Cycle-to-cycle jitter = 250 ps (max) • Operates with a 3.
3 or 5.
0V power supply • Spread output is selectable from 10 to 133 MHz • TEST mode supports modulation off (High-Z) and special test input reference frequency • Guaranteed 45/55 duty cycle • Packaged in a 16-pin, 300-mil-wide SOIC (Small Outline Integrated Circuit) Table 1.
Frequency Selection (14.
318-MHz Reference) FS3 0 0 ...

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