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Clock and Data Distribution Products Part 2 Slide 6

In addition to conventional Spread Spectrum devices, onsemi also offers Spread Spectrum devices with the proprietary Timing Safe Technology. With conventional spread spectrum, if the modulation is added to the main clock of a device, all subsequently derived clocks will also exhibit the modulation which may be an issue in some systems as per the block diagram in the upper left of the slide. For instance, if data and clock need to be synchronized, conventional spread spectrum devices will not work as they produce an output signal that is unlocked and unsynchronized to the input. Conversely, Timing Safe spread spectrum devices modulate the input signal, but the output signal will remain locked and synchronized to the input signal. As seen in the block diagram on the upper right of the slide, the conventional spread spectrum device is removed from the input clock and instead Timing Safe spread spectrum devices are put on the output clocks. The clock and the data remain locked and synchronized. This is usually required in all display applications, among others.

PTM Published on: 2014-08-04