is necessary to induce upset. The dynamic noise margin is measured by applying an
interference pulse of known magnitude and increasing its width until the device just
begins to switch. This yields a plot of noise margin versus pulse width such as shown
in Figure 6.4. The high level and low level dynamic noise margins may be different.
You may often be forced to interface different logic families. Typically, a 3.3V
microprocessor may need to drive 5V buffers or vice versa, or you may not be able to
source a particular part in the same family as the rest of the system, or you may need to
change families to optimise ...
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