74HCT401 Philips, 74HCT401 Datasheet - Page 9

• Manufacturer Part Number: 74HCT401
• Description: 8-bit synchronous BCD down counter
• Manufacturer: Philips

Philips Semiconductors
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
December 1990
SYMBOL PARAMETER
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
f
PHL
PHL
PHL
PLH
THL
W
W
W
rem
su
su
su
h
h
h
max
8-bit synchronous BCD down counter
/ t
/ t
/ t
/ t
TLH
PLH
PLH
PLH
propagation delay
propagation delay
propagation delay
propagation delay
output transition time
clock pulse width
master reset pulse width
preset enable pulse width
removal time
set-up time
set-up time
set-up time
hold time
hold time
hold time
maximum clock pulse
r
P
TE to TC
PL to TC
MR to TC
HIGH or LOW
LOW
PL; LOW
PL; MR to CP
PE to CP
TE to CP
PE to CP
TE to CP
frequency
= t
P
P
n
n
n
; CP to TC
f
to CP
to CP
= 6 ns; C
L
= 50 pF
min. typ. max. min. max. min.
33
30
43
10
20
40
20
0
0
0
15
38
25
49
31
7
11
16
25
1
10
20
12
27
4
15
6
25
63
50
83
55
15
T
9
41
38
54
13
25
50
25
0
0
0
12
74HCT
amb
40 to 85
( C)
79
63
104
69
19
50
45
65
15
30
60
30
0
0
0
10
40 to 125
95
75
125
83
22
max.
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
UNIT
74HC/HCT40102
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
TEST CONDITIONS
(V)
Product specification
CC
WAVEFORMS
Figs 8 and 8
Fig.8
Fig.8
Fig.8
Figs 8 and 8
Fig.8
Fig.8
Fig.8
Fig.8
Fig.8
Fig.8
Fig.8
Fig.8
Fig.8
Fig.8
Fig.8