General Description

The ICS9150-04 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 selectable from 50 to 83.3MHz.

Features

• Generates five processor, six bus, one 14.31818MHz (3.3V) three IOAPIC, 16 SDRAM clocks, 48MHz USB clock and 24MHz Super I/O clock.

• Synchronous clocks skew matched to 250 ps window on CPUCLKs and 500ps window on PCICLKs

• Skew from CPU (earlier) to PCI clock - 1 to 4ns, 2.6ns nom.

• Power Management Control Input pins when MODE Low

• VDD(1:4) - 3.3V –10 (inputs 5V tolerant w/series R )

• VDDL(1:2) - 2.5V or 3.3V –5

• I2C interface for programming stopclocks plus spread spectrum options (–0.5 or –1.5, center spread or down spread)

• 56-pin SSOP package