Philips Semiconductors
Product specification
8-bit synchronous binary down counter
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I
CC
category: MSI
74HC/HCT40103
Note to HCT types
The value of additional quiescent supply current (∆I
CC
) for a unit load of 1 is given in the family specifications.
To determine
∆I
CC
per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
CP, PE
MR
TE
PL
P
n
UNIT LOAD COEFFICIENT
1.50
1.00
0.80
0.35
0.25
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
T
amb
(°C)
74HCT
SYMBOL
PARAMETER
+25
−40
to
+85
−40
to
+125
max.
90
60
112
83
22
50
45
57
15
30
60
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
Fig.7
Fig.8
Fig.9
Fig.9
Figs. 7 and 8
Fig.7
Fig.9
Fig.9
Fig.10
Fig.11
Fig.11
UNIT V
WAVEFORMS
CC
(V)
TEST CONDITIONS
min. typ. max. min. max. min.
t
PHL
/ t
PLH
t
PHL
/ t
PLH
t
PHL
/ t
PLH
t
PHL
t
THL
/ t
TLH
t
W
t
W
t
W
t
rem
t
su
t
su
propagation delay
CP to TC
propagation delay
TE to TC
propagation delay
PL to TC
propagation delay
MR to TC
output transition time
clock pulse width
HIGH or LOW
master reset pulse width
LOW
preset enable pulse width
PL; LOW
removal time
MR to CP or PL to CP
set-up time
PE to CP
set-up time
TE to CP
33
30
38
10
20
40
35
23
44
29
7
10
16
22
1
11
20
60
40
75
55
15
41
38
48
13
25
50
75
50
94
69
19
1998 Jul 08
8
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
