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COMMERCIALANDINDUSTRIALTEMPERATURERANGES

IDT23S09E

3.3VZERODELAYCLOCKBUFFER

ZERO DELAY AND SKEW CONTROL

All outputs should be uniformly loaded in order to achieve Zero I/O Delay. Since the CLKOUT pin is the internal feedback for the PLL, its relative

loading can affect and adjust the input/output delay.

For designs utilizing zero I/O Delay, all outputs including CLKOUT must be equally loaded. Even if the output is not used, it must have a capacitive

load equal to that on the other outputs in order to obtain true zero I/O Delay. For zero output-to-output skew, all outputs must be loaded equally.

SPREAD SPECTRUM COMPATIBLE

Many systems being designed now use a technology called Spread Spectrum Frequency Timing Generation. This product is designed not to filter

off the Spread Spectrum feature of the reference input, assuming it exists. When a zero delay buffer is not designed to pass the Spread Spectrum feature

through, the result is a significant amount of tracking skew, which may cause problems in systems requiring synchronization.