W83194BR-63S

The W83194BR-63S is a Clock Synthesizer which provides all clocks required for high-speed RISC or CISC microprocessor such as Intel Pentium II or Pentium III. W83194BR-63S provides 64 CPU/PCI frequencies which are selectable with smooth transitions by hardware or software. W83194BR-63S also provides 13 SDRAM clocks.

The W83194BR-63S provides step-less frequency programming by controlling the VCO freq. and the programmable PCI clock output divisor ratio. A watch dog timer is quipped and when time out, the RESET# pin will output 4ms pulse signal.

The W83194BR-63S accepts a 14.318 MHz reference crystal as its input. Spread spectrum built in at 0~-0.5% or ±0.25% to reduce EMI. Programmable stopping individual clock outputs and frequency selection through I2C interface. The device meets the Pentium power-up stabilization, which requires CPU and PCI clocks be stable within 2 ms after power-up. Using dual function pin for the slots(ISA, PCI, CPU, DIMM) is not recommend.