Frequency Generator & Integrated Buffers for PENTIUM/ProTM

General Description The ICS9250-13 generates all clocks required for high speed RISC or CISC microprocessor systems such as Intel PentiumPro or Cyrix. Eight different reference frequency multiplying factors are externally selectable with smooth frequency transitions. Spread spectrum may be enab

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Frequency Generator & Integrated Buffers for PENTIUM/Pro™

General Description\nThe ICS9250-13 generates all clocks required for high speed RISC or CISC microprocessor systems such as Intel PentiumPro or Cyrix. Eight different reference frequency multiplying factors are externally selectable with smooth frequency transitions. Spread spectrum may be enabled • 3.3V outputs: SDRAM, PCI, REF, 48/24MHz\n• 2.5V or 3.3V outputs: CPU\n• 20 ohm CPU clock output impedance\n• 20 ohm PCI clock output impedance\n• Skew from CPU (earlier) to PCI clock - 1 to 4 ns, center 2.6 ns.\n• No external load cap for CL=18pF crystals\n• –250 ps CPU, PCI clock skew\n• 400ps (c;

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