NXP Semiconductors
74HC74; 74HCT74
Dual D-type flip-flop with set and reset; positive edge-trigger
Table 8.
Dynamic characteristics
…continued
Voltages are referenced to GND (ground = 0 V); C
L
= 50 pF unless otherwise specified; for test circuit see
Figure 9.
Symbol Parameter
t
h
f
max
hold time
maximum
frequency
Conditions
nD to nCP; see
V
CC
= 4.5 V
nCP; see
V
CC
= 4.5 V
V
CC
= 5 V; C
L
= 15 pF
C
PD
power
dissipation
capacitance
C
L
= 50 pF; f = 1 MHz;
V
I
= GND to V
CC
- 1.5 V
T
amb
=
40 C
to +85
C
Min
3
22
-
-
Typ
[1]
3
54
59
29
Max
-
-
-
-
T
amb
=
40 C
to +125
C
Unit
Min
3
18
-
-
Max
-
-
-
-
ns
MHz
MHz
pF
[1]
[2]
[3]
[4]
All typical values are measured at T
amb
= 25
C.
t
pd
is the same as t
PLH
and t
PHL
.
t
t
is the same as t
THL
and t
TLH
.
C
PD
is used to determine the dynamic power dissipation (P
D
in
W).
P
D
= C
PD
V
CC2
f
i
N +
(C
L
V
CC2
f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in V;
N = number of inputs switching;
(C
L
V
CC2
f
o
) = sum of outputs.
74HC_HCT74
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 27 August 2012
9 of 21
PHILIPS [ NXP SEMICONDUCTORS ]
