General Description

The ICS9159-13 generates all clocks required for high speed RISC or CISC microprocessor systems such as 486, Pentium, PowerPC,™ etc. Four different reference frequency multiplying factors are externally selectable with smooth frequency transitions. A test mode is provided to drive all clocks directly.

Features

• Generates up to six processor and six bus clocks, plus two reference clocks

• Synchronous clocks skew matched to 250ps window on PCLKs and 500ps window on BCLKs

• Processor and bus clocks synchronized to each other, PCLK to BCLK skew window 600ps max

• Test clock mode eases system design

• 3.0V - 5.5V supply range

• 28-pin SOIC package