74hct191 NXP Semiconductors, 74hct191 Datasheet - Page 11

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

Philips Semiconductors
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
December 1990
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
f
SYMBOL
PHL
PHL
PHL
PHL
PHL
PHL
PHL
PHL
THL
W
W
rem
su
su
su
h
h
h
max
Presettable synchronous 4-bit binary
up/down counter
/ 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
removal time
set-up time
set-up time
set-up time
hold time
hold time
hold time
maximum clock pulse
r
CP to Q
CP to TC
CP to RC
D
U/D to TC
U/D to RC
HIGH or LOW
LOW
PL to CP
U/D to CP
D
CE to CP
U/D to CP
= t
CE to RC
PL to Q
D
CE to CP
frequency
n
n
n
f
to Q
to PL
to PL
= 6 ns; C
PARAMETER
n
n
n
L
= 50 pF
16
22
7
41
20
30
0
0
0
20
min. typ. max.
26
32
19
19
22
27
23
24
7
9
11
1
20
9
18
33
18
5
10
25
48
51
35
33
44
46
45
45
15
11
T
20
28
9
51
25
38
0
0
0
16
amb
min.
74HC
40 to 85
( C)
60
64
44
41
55
58
56
56
19
max. min. max.
24
33
11
62
30
45
0
0
0
13
40 to 125
72
77
53
50
66
69
68
68
22
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
74HC/HCT191
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
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
Fig.15
Fig.17
Fig.16
Fig.17
Fig.17
Fig.16
Fig.17
Fig.10
WAVEFORMS