Philips Semiconductors
Product specification
8-bit parallel-in/serial-out shift register
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
su
t
h
t
h
f
max
propagation delay
CP to Q
7
propagation delay
MR to Q
7
output transition time
clock pulse width
HIGH or LOW
master reset pulse width
LOW
removal time
MR to CP
set-up time
D
n
, CE to CP
set-up time
PE to CP
hold time
D
n
, CE to CP
hold time
PE to CP
maximum clock pulse
width
20
25
0
16
30
+25
typ.
23
22
7
9
11
−7
8
15
−3
−13
45
−40
to
+85
max. min.
40
40
15
25
31
0
20
38
max.
50
50
19
30
38
0
24
45
−40
to
+125
min. max.
60
60
22
ns
ns
ns
ns
ns
ns
ns
ns
74HC/HCT166
TEST CONDITIONS
UNIT
V
CC
(V)
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
WAVEFORMS
Fig.7
Fig.8
Fig.7
Fig.7
Fig.8
Fig.8
Fig.9
Fig.8
0
0
25
0
0
20
0
0
17
ns
ns
MHz
4.5
4.5
4.5
Fig.9
Fig.9
Fig.7
December 1990
8
PHILIPS [ NXP SEMICONDUCTORS ]
