The ICS309 is a versatile serially-programmable, triplePLL with spread spectrum clock source. The ICS309can 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 willlock to a new frequency in 10 ms or less. To reduce system EMI emissions, spread spectrum isavailable that supports modulation frequencies of31 kHz and 120 kHz, as well as modulation amplitudesof +/-0.25% to +/-2.0%. Both center and down-spreadoptions are available. The device includes a PDTS pin which tri-states theoutput clocks and powers down the entire chip.The ICS309 default for non-programmed start-up arebuffered reference clock outputs on all clock outputpins. IDT’s VersaClockTM programming software allows theuser to configure up to 9 outputs with targetfrequencies, spread spectrum capabilities or bufferedreference clock outputs. The VersaClockTM softwareautomatically configures the PLLs for optimal overallperformance.
Packaged in 20-pin SSOP (QSOP) – Pb-free, RoHS compliant
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