74HC238 Philips, 74HC238 Datasheet - Page 6

• Manufacturer Part Number: 74HC238
• Description: 3-to-8 line decoder/demultiplexer
• Manufacturer: Philips

Philips Semiconductors
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
Output capability: standard
I
Note to HCT types
The value of additional quiescent supply current ( I
To determine I
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
December 1990
CC
INPUT
A
E
E
SYMBOL PARAMETER
t
t
t
t
t
t
t
PHL
PLH
PHL
PLH
PHL
PLH
THL
n
n
3
3-to-8 line decoder/demultiplexer
category: MSI
/ t
TLH
propagation delay
propagation delay
propagation delay
propagation delay
propagation delay
propagation delay
output transition time
r
A
A
E
E
E
E
= t
n
n
3
3
n
n
CC
f
to Y
to Y
to Y
to Y
to Y
to Y
= 6 ns; C
UNIT LOAD COEFFICIENT
0.70
0.40
1.45
per input, multiply this value by the unit load coefficient shown in the table below.
n
n
n
n
n
n
L
= 50 pF
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
min. typ.
21
17
22
18
21
18
7
25
CC
max.
35
35
37
37
35
35
15
) for a unit load of 1 is given in the family specifications.
6
T
74HCT
amb
min. max.
40 to 85
( C)
44
44
46
46
44
44
19
min.
40 to 125
max.
53
53
56
56
53
53
22
.
UNIT
ns
ns
ns
ns
ns
ns
ns
74HC/HCT238
V
(V)
4.5
4.5
4.5
4.5
4.5
4.5
4.5
TEST CONDITIONS
Product specification
CC
WAVEFORMS
Fig.6
Fig.6
Fig.6
Fig.6
Fig.7
Fig.7
Figs 6 and 7