Design Support

 

Data sheets, which usually give information on device behavior only under recommended operating conditions, may only partially answer engineering questions that arise during the development of systems using logic devices. However, information is frequently needed regarding the behavior of the device outside the conditions in the data sheet. Such questions might be: ?How does a bus driver behave with reduced (or even switched-off) supply voltage?? or ?How does the delay time of a gate with a large capacitive load change?? or ?What must be considered when using backdriving??. This report gives information on a number of questions that frequently arise. In addition, it provides examples that explain phenomena that the designer should be aware of when using devices outside their recommended operating conditions.