The CY28RS400 is a clock generator for ATI® RS400 chipsets from Cypress Semiconductor Corporation. It supports Intel® CPUs, selectable CPU frequencies, differential CPU clock pairs, 100MHz differential SRC clocks, 48MHz USB clock and 33MHz PCI clock. It also has a low-voltage frequency select input, I2C support, ideal Lexmark Spread Spectrum profile and a 3.3V power supply.
