Philips Semiconductors
Product specification
Octal D-type flip-flop; positive edge-trigger;
3-state
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
I
CC
category: MSI
Note to HCT types
74HC/HCT574
The value of additional quiescent supply current (∆I
CC
) for a unit load of 1 is given in the family specifications.
To determine
∆I
CC
per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
D
n
OE
CP
UNIT LOAD COEFFICIENT
0.5
1.25
1.5
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
T
amb
(°C)
74HCT
SYMBOL PARAMETER
min.
t
PHL
/ t
PLH
t
PZH
/ t
PZL
t
PHZ
/ t
PLZ
t
THL
/ t
TLH
t
W
t
su
t
h
f
max
propagation delay
CP to Q
n
3-state output enable
time OE to Q
n
3-state output disable
time OE to Q
n
output transition time
clock pulse width
HIGH or LOW
set-up time
D
n
to CP
hold time
D
n
to CP
maximum clock pulse
frequency
16
12
5
30
+25
typ.
18
19
16
5
7
3
−1
69
max.
33
33
28
12
20
15
5
24
−40
to
+85
min. max.
41
41
35
15
24
18
5
20
UNIT V
CC
−40
to
+125
WAVEFORMS
(V)
min. max.
50
50
42
18
ns
ns
ns
ns
ns
ns
ns
MHz
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
Fig.6
Fig.7
Fig.7
Fig.6
Fig.6
Fig.8
Fig.8
Fig.6
TEST CONDITIONS
December 1990
6
PHILIPS [ NXP SEMICONDUCTORS ]
