Datasheet

1998 Feb 23 4
Philips Semiconductors Product specification
Dual D-type flip-flop with set and reset;
positive-edge trigger
74HC/HCT74
Fig.4 Functional diagram.
FUNCTION TABLE
Note
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
↑ = LOW-to-HIGH CP transition
Q
n+1
= state after the next LOW-to-HIGH CP transition
INPUTS OUTPUTS
S
D
R
D
CP D Q Q
LHXXHL
HLXXLH
LLXXHH
INPUTS OUTPUTS
S
D
R
D
CP D Q
n+1
Q
n+1
HH↑LL H
HH↑HH L
Fig.5 Logic diagram (one flip-flop).