Datasheet

December 1990 7
Philips Semiconductors Product specification
4-bit bidirectional universal shift register 74HC/HCT194
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r
=t
f
= 6 ns; C
L
= 50 pF
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HC
V
CC
(V)
WAVEFORMS
+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
t
PHL
/ t
PLH
propagation delay
CP to Q
n
47
17
14
145
29
25
180
36
31
220
44
38
ns 2.0
4.5
6.0
Fig.7
t
PHL
propagation delay
MR to Q
n
39
14
11
140
28
24
175
35
30
210
42
36
ns 2.0
4.5
6.0
Fig.8
t
THL
/ t
TLH
output transition time 19
7
6
75
15
13
95
19
16
110
22
19
ns 2.0
4.5
6.0
Fig.7
t
W
clock pulse width
HIGH or LOW
80
16
14
17
6
5
100
20
17
120
24
20
ns 2.0
4.5
6.0
Fig.7
t
W
master reset pulse
width; LOW
80
16
14
17
6
5
100
20
17
120
24
20
ns 2.0
4.5
6.0
Fig.8
t
rem
removal time
MR to CP
60
12
10
17
6
5
75
15
13
90
18
15
ns 2.0
4.5
6.0
Fig.8
t
su
set-up time
D
n
to CP
70
14
12
17
6
5
90
18
15
105
21
18
ns 2.0
4.5
6.0
Fig.9
t
su
set-up time
S
0
, S
1
to CP
80
16
12
22
8
6
100
20
17
120
24
20
ns 2.0
4.5
6.0
Fig.10
t
su
set-up time
D
SR
, D
SL
to CP
70
14
12
19
7
6
90
18
15
105
21
18
ns 2.0
4.5
6.0
t
h
hold time
D
n
to CP
0
0
0
−14
−5
−4
0
0
0
0
0
0
ns 2.0
4.5
6.0
Fig.9
t
h
hold time
S
0
, S
1
to CP
0
0
0
−11
−4
−3
0
0
0
0
0
0
ns 2.0
4.5
6.0
Fig.10
t
h
hold time
D
SR
, D
SL
to CP
0
0
0
−17
−6
−5
0
0
0
0
0
0
ns 2.0
4.5
6.0
f
max
maximum clock pulse
frequency
6.0
30
35
31
93
111
4.8
24
28
4.0
20
24
MHz 2.0
4.5
6.0
Fig.7