
Integrated Circuit Systems
General Description
The AV9108 offers a tiny footprint solution for generating two simultaneous clocks. One clock, the REFCLK, is a fixed output frequency which is the same as the input reference crystal (or clock). The other clock, CLK1, can vary between 2 and 120 MHz, with up to 16 selectable preprogrammed frequencies stored in internal ROM.
The ICS9108 is ideal for use in a 3.3V system. It can generate a 66.66 MHz clock at 3.3V. In addition, the ICS9108 provides a symmetrical wave form with a worst case duty cycle of 45/55. The ICS9108 has very tight edge control between the CPU clock and 2XCPU clock outputs, with a worst case skew of 250ps.
FEATUREs
• Runs up to 80 MHz at 3.3V
• 50/50 typical duty cycle at 5V
• ±250ps absolute jitter
• Generates frequencies from 2 to 140 MHz
• 2 to 32 MHz input reference frequency
• Up to 16 frequencies stored internally
• Patented on-chip Phase Locked Loop with VCO for clock generation
• Provides reference clock and synthesized clock
• On-chip loop filter
• Low power 0.8µ CMOS technology
• 8-pin or 14-pin DIP or SOIC package