GENERAL DESCRIPTION
The W83L197R-16 is a Clock Synthesizer which provides all clocks required for high-speed RISC or CISC microprocessor. Four different frequency of CPU, and PCI clocks are externally selectable with smooth transitions. The 0.5% or 0.75% center type spread spectrum can be selected to reduce EMI.
PRODUCT FEATURES
• Supports Pentium II CPUs
• 4 sets of CPU frequencies selection
• 2 CPU clocks (one free running CPU clock)
• 6 PCI synchronous clocks(one free running PCI clock)
• Optional single or mixed supply:
(Vdd3 = VddC= 3.3V±5%) or (VddC = 2.5V±5%)
• Skew form CPU to PCI clock 1.5 to 4.0 ns, CPU leads.
• CPU clock jitter less than 200ps
• PCI_F,PCI1:6 clock skew less than 500ps
• ¡Ó0.5% or ¡Ó0.75% center type spread spectrum function to reduce EMI
• Programmable registers to enable/stop each output and select modes
(mode as Tri-state or Normal )
• 48 MHz for USB
• 28-pin SOP package (209mil)