ICS9159-05

The ICS9159-05 is a low cost frequency generator designed specifically for Pentium/Pentium Pro systems. The integrated buffer minimizes skew and provides the early CPU clock required by some chipsets such as the OPTi VIPER. A 14.318 MHz XTAL oscillator provides the reference clock to generate standard Pentium frequencies. The CPU clock makes gradual frequency transitions without violating the PLL timing of internal micro-processor clock multipliers.

The synchronous bus frequencies of the ICS9159-05 are selectable as CPU for local bus or CPU/2 for PCI bus support. Green PC systemsare supported through power-down, doze, and glitch-free stop clock modes.