ICS309 - Integrated Circuit Systems

ICS309 SERIAL PROGRAMMABLE TRIPLE PLL SS VERSACLOCK SYNTHESIZER

The ICS309 is a versatile serially-programmable, triple PLL with spread spectrum clock source. The ICS309 can generate any frequency from 250kHz to 200 MHz, and up to 6 different output frequencies simultaneously. The outputs can be reprogrammed on-the-fly, and will lock to a new frequency in 10 ms or less. To reduce system EMI emissions, spread spectrum is .

Features

• Packaged in 20-pin SSOP (QSOP)
• Highly accurate frequency generation
• M/N Multiplier PLL: M = 1..2048, N = 1..1024
• Serially programmable: user determines the output frequency via a 3-wire interface
• Spread Spectrum frequency modulation for reduced system EMI
• Center or Down Spread up to 4% total
• Selectable 32 kHz and 120 kHz modulation
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• Eliminates need for custom quartz oscillators Input crystal frequency of 5 - 27 MHz Input clock frequency of 3 - 50 MHz Output clock frequencies up to 200 MHz Operating voltage of 3.3 V Up to 9 reference clock outputs Power down tri-s.