The PI6C3420A is spread spectrum clock synthesizer targeted for video and graphics applications. The primary purpose of the spread spectrum is to minimize EMI emissions. This device generates two 27.000 MHz outputs: a 27.000 MHz down spread spectrum output and a 27.000 MHz non-spread spectrum output. The PI6C3420A down spread range is from 1% to 1.75% when output frequency is at 27 MHz. Spread spectrums are selectable through external pins.