Philips Semiconductors
Product specification
8-bit serial-in/parallel-out shift register
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I
CC
category: MSI
Note to HCT types
74HC/HCT164
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
sa
, D
sb
CP
MR
UNIT LOAD COEFFICIENT
0.25
0.60
0.90
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
PHL
t
THL
/ t
TLH
t
W
t
W
t
rem
t
su
t
h
f
max
propagation delay
CP to Q
n
propagation delay
MR to Q
n
output transition time
clock pulse width
HIGH or LOW
master reset pulse
width; LOW
removal time
MR to CP
set-up time
D
sa
, D
sb
to CP
hold time
D
sa
, D
sb
to CP
18
18
16
12
4
+25
typ.
17
19
7
7
10
7
6
−2
55
max.
36
38
15
23
23
20
15
4
22
−40
to
+85
min.
max.
45
48
19
27
27
24
18
4
18
−40
to
+125
min.
max.
54
57
22
ns
ns
ns
ns
ns
ns
ns
ns
MHz
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
UNIT
V
CC
WAVEFORMS
(V)
TEST CONDITIONS
maximum clock pulse 27
frequency
December 1990
6
PHILIPS [ NXP SEMICONDUCTORS ]
