buffered/unbuffered CMOS

Many CMOS digital ICs are now available in two versions, buffered and unbuffered. The lack of information available to the amateur on the differences between them has given rise to some confusion as to the compatibility of the two types. This article examines both types of CMOS, compares them with the other popular logic family, TTL, and indicates the applications in which buffered CMOS is superior to unbuffered, and vice versa.