Functional Description
   The CY2081 is a general-purpose clock synthesizer designed for use in applications such as modems, disk drives, CD-ROM drives, Video CD players, games, set-top boxes and data/telecommunications. This devices offers three configurable clock outputs in an 8-pin 150-mil SOIC package and can be configured to operate off either a 3.3V or 5V power supply. The on-chip reference oscillator is designed for 10 MHz to 25 MHz crystals. Alternatively, a reference clock between 1 MHz and 30 MHz can be used.

FEATUREs
• Factory-EPROM configurable for quick availability and
prototyping
• General purpose clock synthesizer for all applications
   – such as modems, disk drives, CD-ROM drives, Video
   CD players, games, set-top boxes, data/telecommunications, etc.
• Three independent configurable clock outputs
• Outputs ranging from 500 kHz to 100 MHz (5V) and up
   to 80 MHz for 3.3V operation
• Configurable output control pin (pin 8) can be used as
   an output enable, power-down, suspend or select line.
• Phase-locked loop oscillator input derived from 
   external crystal (10 MHz to 25 MHz) or external reference
   clock (1 MHz to 30 MHz)
• 3.3V or 5V operation (factory configured)
• 8-pin 150-mil packaging achieves minimum footprint
   for space-critical applications
• Sophisticated internal loop filter requires no external
   components or manufacturing tweaks as commonly 
   required with external filters