Clock for Others

W83195WG-301/W83195CG-301 is a Clock Synthesizer for ATI P4 serial chipsets, which 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, all clocks are externally selectable with smooth transitions. W83195WG-301/ W83195CG-301 also support CPU TURBO function when system has heavy loading. It has watchdog timer and reset output pin to support auto-reset when systems hanging caused by improper frequency setting.

W83195WG-301/W83195CG-301 provides I²C serial bus interface to program the registers to enable or disable each clock outputs and provides 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.

• 3 pair current-mode Differential clock outputs for CPU, 6 pair for SRC.
• 2 pair current-mode Differential clock outputs for ATIG programmable.
• 1x PCI clock output, 1x 48 MHz clock output for USB, and 3x 14.318MHz REF clock outputs.
• 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.
• 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.
• Watch Dog Timer and RESET# output pins, and CPU TURBO function support.