FS782 - Cypress Semiconductor

FS782 (FS781 - FS784) Low EMI Spectrum Spread Clock

The Cypress FS781/82/84 are Spread Spectrum clock generator ICs (SSCG) designed for the purpose of reducing electromagnetic interference (EMI) found in today’s high-speed digital systems. The FS781/82/84 SSCG clocks use a Cypress-proprietary technology to modulate the input clock frequency, XIN, by modulating the frequency of the digital clock. By modulating.

Features

• Spread Spectrum clock generator (SSCG) with 1×, 2×, and 4× outputs
• 6- to 82-MHz operating frequency range
• Modulates external clocks including crystals, crystal oscillators, or ceramic resonators
• Programmable modulation with simple R-C external loop filter (LF)
• Center spread modulation
• 3V-5V power supply
• TTL-/CMOS-compatible outputs
• Low short-term jitter
• Low-power Dissipation — 3.3 VDC = 37 mW
  – typical — 5.0 VDC = 115 mW
  – typical
• Available in 8-pin SOIC and TSSOP packages Functional Description The Cypress FS781/82/84 are Spread Spectrum clock generator ICs (SSCG) designe.