What are the major differences between the 5400 and 7400 series of ICs?

• The 5400 series are military grade and require tighter supply voltages and temperatures.
• The 5400 series are military grade and allow for a wider range of supply voltages and temperatures.
• The 7400 series are an improvement over the original 5400s.
• The 7400 series was originally developed by Texas Instruments. The 5400 series was brought out by National Semiconductors after TI's patents expired, as a second supply source.