GENERAL DESCRIPTION

The W83194R-17/-17A is a Clock Synthesizer which provides all clocks required for high-speed RISC or CISC microprocessor such as Intel PentiumII, PentiumPro , AMD or Cyrix. Eight different frequency of CPU, AGP and PCI clocks are externally selectable with smooth transitions. The W83194R-17/-17A provides AGP clocks especially for clone chipset. The highest CPU frequency provided by the W83194R-17 is up to 100MHz, but the one of W83194R-17A is up to 133MHz.

The W83193R-17/-17A provides I2C serial bus interface to program the registers to enable or disable each clock outputs and choose the 0.5% or 1.5% center type spread spectrum to reduce EMI.

PRODUCT FEATURES

·  Supports PentiumÔ, PentiumÔ Pro, PentiumÔ II, AMD and Cyrix CPUs with I2C.

·  4 CPU clocks

·  12 SDRAM clocks for 3 DIMMs

·  Two AGP clocks

·  6 PCI synchronous clocks.

·  Optional single or mixed supply:

   (Vdd = Vddq3 = Vddq2 = Vddq2b = 3.3V) or (Vdd =Vddq2 = Vddq3 = 3.3V, Vddq2b = 2.5V)

·  Skew form CPU to PCI clock -1 to 4 ns, center 2.6 ns, AGP to CPU sync. skew 0 ns (250 ps)

·  Smooth frequency switch with selections from 60 MHz to 133 MHz CPU

·  I2C 2-Wire serial interface and I2C read back

·  ¡Ó0.5% or ¡Ó1.5% 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

·  48-pin SSOP package