Philips Semiconductors
Product speci鏗乧ation
Dual 4-bit binary ripple counter
74HC/HCT393
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
鈥?4HC/HCT/HCU/HCMOS Logic Family Specifications鈥?
Output capability: standard
I
CC
category: MSI
Note to HCT types
The value of additional quiescent supply current (鈭咺
CC
) for a unit load of 1 is given in the family specifications.
To determine
鈭咺
CC
per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
1CP
2CP
1MR
2MR
UNIT LOAD COEFFICIENT
0.4
0.4
1.0
1.0
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
T
amb
(擄C)
74HCT
SYMBOL PARAMETER
+25
min. typ.
t
PHL
/ t
PLH
t
PHL
/ t
PLH
t
PHL
t
THL
/ t
TLH
t
W
t
W
t
rem
f
max
propagation delay
nCP to nQ
0
propagation delay
nQ
n
to nQ
n+1
propagation delay
nMR to nQ
n
output transition time
clock pulse width
HIGH or LOW
master reset pulse
width; HIGH
removal time
nMR to nCP
maximum clock pulse
frequency
19
16
5
27
15
6
18
7
11
6
0
48
鈭?0
to
+85
鈭?0
to
+125
max.
38
15
48
22
29
24
5
18
ns
ns
ns
ns
ns
ns
ns
MHz
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
Fig.7
Fig.7
Fig.8
Fig.7
Fig.7
Fig.8
Fig.8
Fig.7
UNIT V
WAVEFORMS
CC
(V)
TEST CONDITIONS
max. min. max. min.
25
10
32
15
24
20
5
22
31
13
40
19
December 1990
6