Description

The ICS308 is a versatile serially programmable, quad PLL clock source. The ICS308 can generate any frequency from 250 kHz 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. Smooth transitions (in which the clock duty cycle remains roughly 50) are guaranteed if the output divider is not changed.

Features

• Packaged in 20-pin SSOP (QSOP)

• Operating voltage of 3.3 V

• 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

• Eliminates need for custom quartz oscillators

• Input crystal frequency of 5 - 27 MHz

• Optional programmable on-chip crystal capacitors

• Output clock frequencies up to 200 MHz

• Reference clock output

• Power down tri-state mode

• Very low jitter