74HC237 Philips, 74HC237 Datasheet - Page 7

• Manufacturer Part Number: 74HC237
• Description: 3-to-8 line decoder/demultiplexer with address latches
• 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
LE
SYMBOL PARAMETER
t
t
t
t
t
t
t
t
PHL
PHL
PHL
PHL
THL
W
su
h
n
1
2
3-to-8 line decoder/demultiplexer with
address latches
category: MSI
/ t
/ t
/ t
/ t
/ t
TLH
PLH
PLH
PLH
PLH
propagation delay
propagation delay
propagation delay
propagation delay
output transition time
LE pulse width
set-up time
hold time
r
UNIT LOAD COEFFICIENT
1.50
1.50
1.50
1.50
= t
E
A
LE to Y
E
HIGH
A
A
2
CC
f
n
1
n
n
to Y
= 6 ns; C
to Y
to Y
to LE
to LE
per input, multiply this value by the unit load coefficient shown in the table below.
n
n
n
n
L
= 50 pF
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
min. typ.
10
10
5
22
25
20
20
7
5
2
0
25
CC
max.
38
42
35
33
15
) for a unit load of 1 is given in the family specifications.
7
T
74HCT
amb
min. max.
13
13
5
40 to 85
( C)
48
53
44
41
19
min.
15
15
5
40 to 125
max.
57
63
53
50
22
.
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
74HC/HCT237
V
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
TEST CONDITIONS
Product specification
(V)
CC
WAVEFORMS
Fig.6
Fig.7
Fig.7
Fig.6
Fig.6
Fig.8
Fig.8
Fig.8