Datasheet

7–161
Effects of Simultaneous Switching and Capacitive Loading on Propagation Delay
Another factor that may be of concern to a designer is the change in propagation delay when more outputs are switching or
when the output capacitive load is varying. This data is very useful, since a typical application would use all outputs
simultaneously. In addition, it usually requires different loading conditions than the data sheet specifies. Data sheets do not
show the performance of the device with different loads; they only use the standard load specified in data sheets. Figure 31
shows the propagation delay of a device as the number of outputs switching increases. Figures 32 and 33 show the increase
in propagation delays (t
PHL
and t
PLH
) as the output capacitive load increases from 0 pF to 200 pF.