Clock for Intel® Chipsets

The W83195BG-101 is a Clock Synthesizer for Intel P4 processors and Intel Grandsdale chipsets, which provides all clocks required for high-speed microprocessor and step-less frequency programming, 32 different frequencies of CPU, PCI, SRC clocks setting. Simultaneously W83195BG-101 supports SRC_SATA 100MHz clock output for SATA and DOT 96MHz clock outputs for integrated graphic chipsets. All clocks are externally selectable with smooth transitions.

W83195BG-101 programs the registers to enable or disable each clock outputs through I²C serial bus interface and provides -0.5% down type spread spectrum or programmable spread spectrum scale to reduce EMI. It is driven with a 14.318 MHz reference crystal and runs on a 3.3V supply.

• 2 pair 0.7 V current mode Differential clock outputs for CPU
• 6 pair 0.7V current mode Differential clock outputs for SRC and SRC_SATA.
• 1 pair 0.7V current mode Differential 96MHz clock outputs for DOT.
• 6x PCI clock outputs for PCI, and 3x PCI clock free running outputs for PCI
• 1x 48 MHz clock output for USB, and 1x 14.318MHz REF clock outputs.
• 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/stop each output, and programmable clock outputs to control skew.
• Watch Dog Timer output