Philips Semiconductors
Product specification
Octal D-type transparent latch; 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/HCT573
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
LE
OE
UNIT LOAD COEFFICIENT
0.35
0.65
1.25
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
T
amb
(°C)
74HCT
SYMBOL PARAMETER
+25
min.
t
PHL
/ t
PLH
t
PHL
/ t
PLH
t
PZH
/ t
PZL
propagation delay
D
n
to Q
n
propagation delay
LE to Q
n
3-state output enable
time
OE to Q
n
3-state output disable
time
OE to Q
n
output transition time
enable pulse width
HIGH
set-up time
D
n
to LE
hold time
D
n
to LE
16
13
9
typ.
20
18
17
max.
35
35
30
−40
to +85
min. max.
44
44
38
UNIT V
CC
−40
to +125
WAVEFORMS
(V)
min. max.
53
53
45
ns
ns
ns
4.5
4.5
4.5
Fig.6
Fig.7
Fig.8
TEST CONDITIONS
t
PHZ
/ t
PLZ
18
30
38
45
ns
4.5
Fig.8
t
THL
/ t
TLH
t
W
t
su
t
h
5
5
7
4
12
20
16
11
15
24
20
14
18
ns
ns
ns
ns
4.5
4.5
4.5
4.5
Fig.6
Fig.7
Fig.9
Fig.9
December 1990
6
PHILIPS [ NXP SEMICONDUCTORS ]
