December 1990

7

Philips Semiconductors

Product specification

8-bit magnitude comparator

74HC/HCT688

AC WAVEFORMS

Fig.6

Waveforms showing the enable input (E) to

the equal to output (P = Q) propagation

delays and the output transition times.

Fig.7

to the equal to output (P = Q) propagation

delays and the output transition times.

APPLICATION INFORMATION

Two or more “688” 8-bit magnitude comparators may be cascaded to compare binary or BCD numbers of more than 8

bits. An example is shown in Fig.8.

PACKAGE OUTLINES

See

Fig.8 Binary or BCD comparator.