W83194R-KX

W83194R-KX 133MHZ 3-DIMM K7 CLOCK 1.0 GENERAL DESCRIPTION The W83194R-KX is a clock generator which provides all clocks required for AMD K7 system. W83194R-KX provides one differential pair CPU clock open drain outputs up to 143MHz which are externally selectable with smooth transitions. W83194R-KX also provides 6 PCI clocks and 13 SDRAM clocks controlled by the none-delay buffer_in pin. The W83194R-KX accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply. Spread spectrum built in at ±0.5% or ±0.25% to reduce EMI. Programmable stopping individual clock 2 outputs and frequency selection through I C interface. The device meets the Pentium power-up stabilization, which requires CPU and PCI clocks be stable within 2 ms after power-up. High drive six PCI and thirteen SDRAM CLOCK outputs typically provide greater than 1 V /ns slew rate into 30 pF loads. Two CPU CLOCK outputs typically provide better than 1 V /ns slew rate into 20 pF loads, when maintaining 50± 5% duty cycle. The fixed frequency outputs, such as REF, 24MHz, and 48 MHz provide better than 0.5V /ns slew rate. 2.0 PRODUCT FEATURES Supports AMD K7 CPU with I C. One pair of differential CPU clocks One chipset clock 13 SDRAM clocks for 3 DIMMs 6 PCI synchronous clocks Optional single or mixed supply: (Vddq3=Vddq2 =3.3V) or (Vddq3 = 3.3V, Vddq2 = 2.5V) < 250ps skew among CPU clocks < 250ps skew among PCI clocks < 5ns propagation delay SDRAM from buffer input Skew fro...