![]() as then designed with different resistor values to produce gates with lower power dissipation or with higher speed. The standard TIL gate was the first version in theTIL family. because it indicates that a given propagation delay can beachieved without excessive power dissipation. the speed-power product is measured in picojoules (pJ ).A low value for this parameter is desirable. The product of the propagation delay and power dissipation. and propagation delay were defined in Section The speed-power product is an important parameter used in comparing the various TIL series. Commercial TIL ICs have a number designation that starts with 74 and follows with a suffix that identifies the series. The names and characteristics of eight TIL series appear in Table 10.2. There are several subfamilies or series of the TTL technology. are the dominant technologies in VLSI circuits. which will be discussed in Sections 10.7 and 10.8. ![]() improvements were added to the point where this logic family became widely used in the design of digital systems. The original basic transistor- transistor logic (TIL) gute was a slight improvement over the DTL gate. ![]()
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