74hct191 NXP Semiconductors, 74hct191 Datasheet - Page 9

• Manufacturer Part Number: 74hct191
• Description: Presettable Synchronous 4-bit Binary Up/down Counter
• Manufacturer: NXP Semiconductors

Philips Semiconductors
December 1990
t
t
t
t
t
t
t
f
SYMBOL
rem
su
su
su
h
h
h
max
Presettable synchronous 4-bit binary
up/down counter
removal time
set-up time
set-up time
set-up time
hold time
hold time
hold time
maximum clock pulse
PL to CP
U/D to CP
D
CE to CP
U/D to CP
D
CE to CP
frequency
n
n
to PL
to PL
PARAMETER
35
7
6
205
41
35
100
20
17
140
28
24
0
0
0
0
0
0
0
0
0
4.0
20
24
min. typ. max.
8
3
2
50
18
14
19
7
6
44
16
13
11
33
39
39
14
11
11
4
3
28
10
8
25
T
9
45
9
8
255
51
43
125
25
21
175
35
30
0
0
0
0
0
0
0
0
0
3.2
16
19
amb
min.
74HC
40 to 85
( C)
max. min. max.
55
11
9
310
62
53
150
30
26
210
42
36
0
0
0
0
0
0
0
0
0
2.6
13
15
40 to 125
UNIT
ns
ns
ns
ns
ns
ns
ns
MHz
74HC/HCT191
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
V
(V)
TEST CONDITIONS
CC
Product specification
Fig.15
Fig.17
Fig.16
Fig.17
Fig.17
Fig.16
Fig.17
Fig.10
WAVEFORMS