74hct191 NXP Semiconductors, 74hct191 Datasheet - Page 8

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

Philips Semiconductors
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
Output capability: standard
I
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
December 1990
CC
t
t
t
t
t
t
t
t
t
t
t
SYMBOL
PHL
PHL
PHL
PHL
PHL
PHL
PHL
PHL
THL
W
W
Presettable synchronous 4-bit binary
up/down counter
category: MSI
/ t
/ t
/ t
/ t
/ t
/ t
/ t
/ t
/ t
TLH
PLH
PLH
PLH
PLH
PLH
PLH
PLH
PLH
propagation delay
propagation delay
propagation delay
propagation delay
propagation delay
propagation delay
propagation delay
propagation delay
output transition time
clock pulse width
parallel load pulse width
r
CP to Q
CP to TC
CP to RC
CE to RC
D
PL to Q
U/D to TC
U/D to RC
HIGH or LOW
LOW
= t
n
f
to Q
= 6 ns; C
PARAMETER
n
n
n
L
= 50 pF
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
125
25
21
100
20
17
min. typ. max.
72
26
21
83
30
24
47
17
14
33
12
10
61
22
18
61
22
18
44
16
13
50
18
14
19
7
6
28
10
8
22
8
6
25
220
44
37
255
51
43
150
30
26
130
26
22
220
44
37
220
44
37
210
42
36
75
15
13
190
38
32
T
8
155
31
26
125
25
21
amb
min.
74HC
40 to 85
( C)
275
55
47
320
64
54
190
38
33
165
33
28
275
55
47
275
55
47
240
48
41
265
53
45
95
19
16
max. min. max.
195
39
33
150
30
26
40 to 125
330
66
56
395
77
65
225
45
38
195
39
33
330
66
56
330
66
56
285
57
48
315
63
54
110
22
19
.
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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
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.10
Fig.10
Fig.11
Fig.11
Fig.12
Fig.13
Fig.14
Fig.14
Fig.15
Fig.10
Fig.15
WAVEFORMS