Philips Semiconductors
Product specification
Octal D-type flip-flop with reset;
positive-edge trigger
74HC/HCT273
FUNCTION TABLE
INPUTS
OUTPUTS
Qn
OPERATING
MODES
MR
CP
Dn
reset (clear)
load “1”
L
H
H
X
↑
X
h
I
L
H
L
load “0”
↑
Note
1. H = HIGH voltage level
h = HIGH voltage level one set-up time prior to the
LOW-to-HIGH CP transition
L = LOW voltage level
I = LOW voltage level one set-up time prior to the
LOW-to-HIGH CP transition
↑ = LOW-to-HIGH transition
X = don’t care
Fig.4 Functional diagram.
Fig.5 Logic diagram.
September 1993
4