Newnes Digital Logic IC Pocket Book

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The ‘74’-series of Digital ICs

Chapter 1 started off by looking at digital logic IC basics, went on to describe basic logic IC families – including TTL and CMOS – and concluded by introducing the ‘74’-series of ICs. The present chapter takes a deeper look at the ‘74’-series of ICs, and at various sub-members of the TTL and CMOS families.

The ‘74’-series of Digital ICs

Modern digital electronics is dominated by two major logic IC families, these being the low-speed ‘4000’-series of CMOS ICs, and the ‘74’-series of fast TTL and CMOS ICs. The ‘74’ family was originally based entirely on TTL technology, which first hit the electronics scene in a big way in about 1972, when the ‘74’-series suddenly arrived in the form of an entire range of versatile ...