NXP Semiconductors
74HC74; 74HCT74
Dual D-type flip-flop with set and reset; positive edge-trigger
10. Dynamic characteristics
Table 8.
Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); C
L
= 50 pF unless otherwise specified; for test circuit see
Symbol Parameter
74HC74
t
pd
propagation
delay
nCP to nQ, nQ; see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 5 V; C
L
= 15 pF
V
CC
= 6.0 V
nSD to nQ, nQ; see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 5 V; C
L
= 15 pF
V
CC
= 6.0 V
nRD to nQ, nQ; see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 5 V; C
L
= 15 pF
V
CC
= 6.0 V
t
t
transition
time
nQ, nQ; see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
t
W
pulse width
nCP HIGH or LOW;
see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
nSD, nRD LOW;
see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
t
rec
recovery
time
nSD, nRD; see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
40
8
7
3
1
1
-
-
-
45
9
8
-
-
-
ns
ns
ns
100
20
17
19
7
6
-
-
-
120
24
20
-
-
-
ns
ns
ns
100
20
17
19
7
6
-
-
-
120
24
20
-
-
-
ns
ns
ns
Conditions
T
amb
=
40 C
to +85
C
Min
Typ
Max
T
amb
=
40 C
to +125
C
Unit
Min
Max
-
-
-
-
47
17
14
14
220
44
-
37
-
-
-
-
265
53
-
45
ns
ns
ns
ns
-
-
-
-
50
18
15
14
250
50
-
43
-
-
-
-
300
60
-
51
ns
ns
ns
ns
-
-
-
-
-
-
-
52
19
16
15
19
7
6
250
50
-
43
95
19
16
-
-
-
-
-
-
-
300
60
-
51
110
22
19
ns
ns
ns
ns
ns
ns
ns
74HC_HCT74
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 27 August 2012
7 of 21
PHILIPS [ NXP SEMICONDUCTORS ]
