Clock for Intel® Chipsets

The W83195BG-118 is a Clock Synthesizer for Intel P4 processors and Intel Grandsdale chipsets, which provides all clocks required for high-speed microprocessor and provides step-less frequency programming, 32 different frequencies of CPU, PCI, PCI-Express clocks setting. Simultaneously W83195BG-118 supports SRC 100MHz for SATA and DOT 96MHz clock outputs for integrated graphic chipsets. All clocks are externally selectable with smooth transitions.

The W83195BG-118 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 also has watchdog timer and reset output pin to support auto-reset when systems hanging caused by improper frequency setting, and 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
• 1 pair 0.7V current mode Differential 100 MHz clock outputs for SRC.
• 1 pair 0.7V current mode Differential 96MHz clock outputs for DOT.
• 5 pair 0.7V current mode Differential clock outputs for PCI-Express
• 6x PCI clock outputs for PCI, 3 free running, and 2x 14.318MHz REF clock outputs.
• 1x 24_48Mhz clock output for super I/O, 1x 48MHz clock output for USB
• Step-less frequency programming and programmable spread spectrum 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.
• Programmable clock outputs to control slew rate and skew.
• Watch Dog Timer and RESET# output pins