描述 Description

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.

特性 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

? 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-state mode

? Very low jitter