ICS2684M

Description

The ICS2694 Motherboard Clock Generator is an integrated circuit using PLL and VCO technology to generate virtually all the clock signals required in a PC. The use of the device can be generalized to satisfy the timing needs of most digital systems by reprogramming the VCO or reconfiguring the counter stages which derive the output frequencies from the VCO’s.

Features

• Low cost - eliminates multiple oscillators and Count Down Logic
• Primary VCO has 16 Mask Programmable frequencies (normally CPU clock)
• Secondary VCO has 1 Mask Programmable frequency (usually 96 MHz)
• Pre-programmed versions for typical PC applications
• 10 Outputs in addition to the primary CPU clock
• Capability to reconfigure counter stages to change the frequencies of the outputs via mask options
• Advanced PLL design
• On-chip PLL filters
• Very Flexible Architecture

Applications

• CPU clock and Co-processor clock
• Hard Disk and Floppy Disk clock
• Keyboard clock
• Serial Port clock
• Bus clock
• System counting or timing functions