ICS9248-50_1 Datasheet, PDF (1/10 Pages) Integrated Circuit Systems – Frequency Timing Generator for Pentium II Systems

Integrated
Circuit
Systems, Inc.
ICS9248-50
Frequency Timing Generator for Pentium II Systems
General Description
The ICS9248-50
Block Diagram
ICS9248-50
Features
• Generates the following system clocks:
- 2 CPU (2.5V) up to 100MHz.
- 6 PCI (3.3V) @ 33.3MHz (Includes one free
running).
- 2 REF clks (3.3V) at 14.318MHz.
• Skew characteristics:
- CPU – CPU<175ps
- PCI – PCI < 500ps
- CPU(early) – PCI = 1.5ns – 4ns.
• Supports Spread Spectrum modulation for CPU and
PCI clocks, 0.5% down spread
• Efficient Power management scheme through stop
clocks and power down modes.
• Uses external 14.318MHz crystal, no external load
cap required for CL=18pF crystal.
• 28-pin (209 mil) SSOP package
Pin Configuration
Power Groups
0278I—06/03/03
28-Pin SSOP