Clock for Intel® Chipsets

The W83194BG-603 is a Clock Synthesizer for Intel Springdale/Prescott chipset, which provides all clocks required for high-speed microprocessor and provides step-less frequency programming and 32 different frequencies of CPU, PCI, and 3V66 clocks setting, support SRC clock outputs, all clocks are externally selectable with smooth transitions.

W83194BG-603 support 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. It also has watchdog timer and reset output pin to support auto-reset when systems hanging caused by improper frequency setting. It accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.

• 2 0.7V current-mode Differential pairs clock outputs for CPU, and 1pair for SRC
• 3x 3V66 clock outputs, and 1x VCH/3V66 selectable 48MHz or 66MHz
• 9x PCI synchronous clocks and 2x 14.318MHz REF clock outputs.
• 1x 24_48Mhz clock output for super I/O, and 1x 48 MHz clock output for USB.
• 3V66/PCI clock out supports synchronous and asynchronous mode
• Smooth frequency switch with selections from 100 to 400MHz
• Step-less frequency programming and programmable registers to enable/stop each output and select modes
• I²C 2-Wire serial interface and support byte read/write and block read/write.
• -0.5% and +/- 0.25% center type spread spectrum or programmable S.S.T. scale to reduce EMI
• Programmable clock outputs Slew rate control and Skew control
• Watch Dog Timer and RESET# output pins