W83194BR-P4X

The W83194BR-P4X is a Clock Synthesizer for VIA P4 chipset. W83194BR-P4X provides all clocks required for high-speed microprocessor and provides step-less frequency programming and 32 different frequencies of CPU, PCI, and AGP clocks setting. All clocks are externally selectable with smooth transitions.

The W83194BR-P4X provides I²C serial bus interface to program the registers to enable or disable each clock outputs and provides -0.5% and +/-0.25% center type spread spectrum or programmable S.S.T. scale to reduce EMI.

The W83194BR-P4X also has watch dog timer and reset output pin to support auto-reset when systems hanging caused by improper frequency setting.

The W83194BR-P4X accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply. High drive PCI CLOCK outputs typically provide greater than 1 V /ns slew rate into 30 pF loads. The fixed frequency outputs as REF and 48 MHz provide better than 0.5V /ns slew rate.