ICS280

PRELIMINARY INFORMATION ICS280 Triple PLL Field Prog. Spread Spectrum Clock Synthesizer Description The ICS280 field programmable spread spectrum clock synthesizer generates up to four high-quality, high-frequency clock outputs including multiple reference clocks from a low-frequency crystal input. It is designed to replace crystals, crystal oscillators and stand alone spread spectrum devices in most electronic systems. Using ICS’ VersaClockTM software to configure PLLs and outputs, the ICS280 contains a One-Time Programmable (OTP) ROM for field programmability. Programming features include input/output frequencies, spread spectrum amount and eight selectable configuration registers. Using Phase-Locked Loop (PLL) techniques, the device runs from a standard fundamental mode, inexpensive crystal, or clock. It can replace multiple crystals and oscillators, saving board space and cost. The ICS280 is also available in factory programmed custom versions for high-volume applications. Features Packaged as 16-pin TSSOP Eight addressable registers Replaces multiple crystals and oscillators Output frequencies up to 200 MHz at 3.3 V Configurable Spread Spectrum Modulation Input crystal frequency of 5 to 27 MHz Input clock frequency of 3 to 166 MHz Up to four reference outputs Operating voltages of 3.3 V Controllable output drive levels Advanced, low-power CMOS process Available in Pb (lead) free packaging Block Diagram VDD PLL1 with Spread Spectrum Divide Logi...