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/HCT374
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
OE
CP
D
n
UNIT LOAD COEFFICIENT
1.25
0.90
0.35
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
T
amb
(°C)
74HCT
SYMBOL
PARAMETER
UNIT V
WAVEFORMS
CC
+25
−40
to
+85 −40
to
+125
(V)
min. typ. max. min. max. min. max.
16
16
18
5
19
12
5
26
11
7
−3
44
32
30
28
12
24
15
5
21
40
38
35
15
29
18
5
17
48
45
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
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
December 1990
6
PHILIPS [ NXP SEMICONDUCTORS ]
