GENERAL DESCRIPTION

The W83115RG-BW/W83115WG-BW is a Clock Synthesizer for Intel Broadwater series chipsets. W83115RG-BW/ W83115WG-BW provides all clocks required for the high-speed microprocessor and provides 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.

The 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.

The W83115RG-BW/W83115WG-BW accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.

PRODUCT FEATURES

• 2 pair push-pull Differential clock outputs for CPU.

• 7 pair push-pull Differential clock outputs for SRC.

• 1 pair push-pull Differential clock outputs for CPU/SRC selectable.

• 1 pair push-pull Differential clock outputs for DOT/SRC selectable.

• 5 PCI clock outputs, 1 free running.

• 1 48 MHz clock output for USB.

• 1 14.318MHz REF clock output.

• Smooth frequency switch with selections from 100 to 400MHz.

• Step-less frequency programming.

• 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 S.S.T. scale to reduce EMI in M/N mode.

• Programmable registers to enable/disable each output and select modes.

• Programmable clock outputs slew rate control and skew control.

• 56 pins TSSOP/SSOP package.