GENERAL DESCRIPTION

The W83196S-14 is a Clock Synthesizer which provides all clocks required for high-speed RISC or CISC microprocessor. Twelve different frequency of CPU, and PCI clocks are externally selectable with smooth transitions.

FEATURES

• Supports PentiumÔ II CPUs with I2C

• 12 sets of CPU frequencies selection

• 2 CPU clocks (one free running CPU clock)

• 7 PCI synchronous clocks(one free running PCI clock)

• Optional single or mixed supply:

(VDDR = VDDCore = VDDP = VDD4 = 3.3V ±5)

(VDDA = VDDC = 2.5V ±5)

• Skew form CPU to PCI clock 1.5 to 4.0 nS, CPU leads.

• CPU clock jitter less than 200 pS

• PCI_F, PCI1: 6 clock skew less than 500 pS

• Smooth frequency switch with selections from 66.8 MHz to 150 MHz CPU

• I2C 2-Wire serial interface and I2C read back

• ±0.5 center type spread spectrum function to reduce EMI

• Programmable registers to enable/stop each output and select modes

(mode as Tri-state or Normal )

• MODE pin for power management

• 48 MHz for USB

• 24 MHz for super I/O

• Packaged in 28-pin SOP