ICS9248-65 Overview
The ICS9248-65 is a main clock synthesizer chip for Pentium II based systems using Rambus Interface DRAMs. This chip provides all the clocks required for such a system when used with a Direct Rambus Clock Generator(DRCG) chip such as the ICS9211-01. Spread Spectrum may be enabled by driving the SPREAD# pin active.
ICS9248-65 Key Features
- 3 CPU clocks ( 2.5V, 100/133MHz)
- 10 PCI clocks, including 1 free-running (3.3V, 33.3MHz)
- 1 CPU/2 clocks (2.5V, 50/66.6MHz)
- 1 IOAPIC clocks (2.5V, 16.67MHz)
- 3 Fixed frequency 66MHz clocks(3.3V, 66.6MHz)
- 2 REF clocks(3.3V, 14.318MHz)
- 1.5ns (CPU leads) 3V66 to PCI Output Offset: 1.5
- 4ns (CPU leads) CPU to IOAPIC Output Offset 1.5
- 4.0ns (CPU leads)