The MK1493-05 is a spread-spectrum clock generator used as a companion chip with a CK410 system clock. The device is used in a PC or embedded system to substantially reduce electro-magnetic interference (EMI). The device provides a differential spread-spectrum high frequency output and a reference output clock. An SMBus is connected to the CK410 for command and control of the MK1493-05. The input reference clock to the MK1493-05 comes directly from the CK410. No external, expensive crystal or crystal oscillator is required. A 16-pin TSSOP package is employed to maximize board space utilization.