CY2254A Overview
The CY2254A is a Clock Synthesizer/Driver that provides the multiple clocks required for a Pentium-based PC. The CY2254A has low-skew outputs (< 250 ps between the CPU Clocks, < 250 ps between the PCI Clocks). In addition, the CY2254A CPU clock outputs have less than 200 ps cycle-to-cycle jitter.
CY2254A Key Features
- Multiple clock outputs to meet requirements of most Pentium® motherboards
- Four pin-selectable CPU clocks @ 66.66 MHz, 60.0 MHz, and 50.0 MHz for support of Intel Triton™ PCIset based PC
- 55.0 MHz pin-selectable CPU clock also available (2 option only)
- Six PCI clocks at 1/2 CPU Clock frequency
- One I/O clock @ 24 MHz
- One Keyboard Controller clock @ 12 MHz (1 option) or one Universal Serial Bus clock @ 48 MHz (2 option)
- Two Ref. clocks @ 14.318 MHz
- Ref. 14.318 MHz Xtal oscillator input
- CPU clock jitter < 200 ps cycle-to-cycle
- Low skew outputs
