Datasheet Details
| Part number | ICS9250-12 |
|---|---|
| Manufacturer | Integrated Circuit Systems |
| File Size | 395.23 KB |
| Description | Frequency Generator & Integrated Buffers |
| Datasheet |
 ICS9250-12 Datasheet
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General Description
The ICS9250-12 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 ICS9212-01, 02, 03 and a PCI buffer 9112-17.
Key Features
- Generates the following system clocks: - 4 CPU clocks ( 2.5V, 100/133MHz) - 8 PCI clocks, including 1 free-running (3.3V, 33MHz) - 2 CPU/2 clocks (2.5V, 50/66MHz) - 3 IOAPIC clocks (2.5V, 16.67MHz) - 4 Fixed frequency 66MHz clocks(3.3V, 66MHz) - 2 REF clocks(3.3V, 14.318MHz) - 1 USB clock (3.3V, 48MHz) Efficient power management through PD#, CPU_STOP# and PCI_STOP#. 0.5% typical down spread modulation on CPU, PCI, IOAPIC, 3V66 and CPU/2 output clocks. Uses external 14.318MHz crystal. K.