ON Semiconductor intros active spread spectrum clock generator ICs

USA: ON Semiconductor has introduced a new series of active spread spectrum clock generator integrated circuits (ICs) that manage electromagnetic interference (EMI) and Radio Frequency Interference (RFI) at the clock source, delivering system-wide EMI reduction of all clock dependent signals.

The P3P8203A LVCMOS peak EMI reduction clock generator targets applications such as graphics cards, computing and consumer applications. This device supports an input voltage of 3.3 V, a frequency range of 18 MHz to 36 MHz, and analog control of spread spectrum deviation by means of an external resistor.

By choosing a different value of the external resistor to provide the desired amount of spread spectrum deviation at the output, system designers now have the added flexibility to customize their applications to achieve the desired EMI reduction in their applications. The P3P8203A is housed in an 8-pin, 2 mm x 2mm x 0.8 mm WDFN package, making it ideal for use in PCB space constrained applications. Operating temperature range is 0°C to +70°C.

The P3MS650100H and P3MS650103H LVCMOS peak EMI reduction clock generators are ideal for use in PCB space constrained applications such as portable, battery powered devices – including mobile phones and tablets where EMI/RFI can be a significant challenge and compliance with regulations is a pre-requisite.

Housed in a miniature four-pin WDFN package measuring 1 mm x 1.2 mm x 0.8 mm, these versatile new devices are spread spectrum clock generators that provide the industry’s smallest standalone active solution for reducing EMI/RFI at the clock source as well as downstream clock and data signals derived from the clock source.

The P3MS650100H and P3MS650103H support input voltages ranging from 1.8 volts (V) to 3.3 V, typical  spread spectrum deviations of 0.45 percent to 1.4 percent, and reduction of EMI/RFI in clock sources with a frequency range of  15 megahertz MHz to 60 MHz. Operating temperature range is -20ºC to +85ºC.

“The need to achieve EMI regulatory compliance while controlling costs and minimizing PCB real estate is a significant challenge for mobile and computing applications,” said Ryan Cameron, VP of Industrial and Timing Products at ON Semiconductor.

“Our new EMI reduction ICs address these challenges on all fronts by providing a cost-effective solution that reduces EMI/RFI at the source and at all downstream clock and data signals derived from the source. By implementing these devices early in the design cycle, design engineers potentially avoid the need for alternate solutions and the inclusion of costly additional PCB layers or shielding to deal with EMI/RFI problems.”

The P3P8203A is offered in an eight-pin WDFN package and is priced at $0.44 per unit in 10,000 unit quantities. The P3MS650100H and P3MS650103H are offered in a four-pin WDFN package and are priced at $0.24 per unit in 10,000 unit quantities.