Description
General Description
These 4-bit magnitude comparators perform comparison of
straight binary or BCD codes. Three fully-decoded decisions about two, 4-bit words (A, B) are made and are externally available at three outputs. These devices are fully
expandable to any number of bits without external gates.
Words of greater length may be compared by connecting
comparators in cascade. The A > B, A < B, and A = B outputs of a stage handling less-significant bits are connected
to the corresponding inputs of the next stage handling
more-significant bits. The stage handling the leastsignificant bits must have a high-level voltage applied to
the A = B input. The cascading path is implemented with
only a two-gate-level delay to reduce overall comparison
times for long words.
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