74HC688 Datasheet, PDF (7/7 Pages) NXP Semiconductors – 8-bit magnitude comparator

Philips Semiconductors
8-bit magnitude comparator
AC WAVEFORMS
Product specification
74HC/HCT688
(1) HC : V_M = 50%; V_I = GND to V_CC.
HCT: V_M = 1.3 V; V_I = GND to 3 V.
Fig.6 Waveforms showing the enable input (E) to
the equal to output (P = Q) propagation
delays and the output transition times.
(1) HC : V_M = 50%; V_I = GND to V_CC.
HCT: V_M = 1.3 V; V_I = GND to 3 V.
Fig.7 Waveforms showing the word inputs (P_n, Q_n)
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.
Fig.8 Binary or BCD comparator.
PACKAGE OUTLINES
See “74HC/HCT/HCU/HCMOS Logic Package Outlines”.
December 1990
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