Clock for Intel® Chipsets

The W83115RG-BW/W83115WG-BW is a Clock Synthesizer for Intel Broadwater serial chipsets, which provides all clocks required for the high-speed microprocessor and step-less frequency programming and 32 different frequencies of CPU, PCI, and SRC clocks setting, support SATA and DOT clock outputs, all clocks are externally selectable with smooth transitions.

W83115RG-BW/W83115WG-BW provides I²C serial bus interface to program the registers to enable or disable each clock outputs and provides -0.5% down type spread spectrum or programmable S.S.T. scale to reduce EMI. It accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.

• 2 pair push-pull Differential clock outputs for CPU, and 7 pair for SRC
• 1 pair push-pull Differential clock outputs for CPU/SRC selectable.
• 1 pair push-pull Differential clock outputs for DOT/SRC selectable.
• 5x PCI clock outputs, 1 free running.
• 1x 48 MHz clock output for USB, and 1x 14.318MHz REF clock outputs.
• Smooth frequency switch with selections from 100 to 400MHz.
• Step-less frequency programming, and programmable S.S.T. scale to reduce EMI in M/N mode.
• I²C 2-wire serial interface and support byte read/write and block read/write.
• -0.5% down type spread spectrum in H/W and software select mode.
• Programmable registers to enable/disable each output and select modes.
• Programmable clock outputs slew rate control and skew control.