SN54HC138, SN74HC138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SCLS107E − DECEMBER 1982 − REVISED SEPTEMBER 2003
recommended operating conditions (see Note 3)
SN54HC138
MIN
V
CC
V
IH
Supply voltage
V
CC
= 2 V
High level
High-level input voltage
V
CC
= 4.5 V
V
CC
= 6 V
V
CC
= 2 V
V
IL
V
I
V
O
Δt/Δv
T
A
Low level
Low-level input voltage
Input voltage
Output voltage
V
CC
= 2 V
Input transition rise/fall time
Operating free-air temperature
V
CC
= 4.5 V
V
CC
= 6 V
−55
V
CC
= 4.5 V
V
CC
= 6 V
0
0
2
1.5
3.15
4.2
0.5
1.35
1.8
V
CC
V
CC
1000
500
400
125
−40
0
0
NOM
5
MAX
6
SN74HC138
MIN
2
1.5
3.15
4.2
0.5
1.35
1.8
V
CC
V
CC
1000
500
400
85
°C
ns
V
V
V
V
NOM
5
MAX
6
UNIT
V
NOTE 3: All unused inputs of the device must be held at V
CC
or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs,
literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
2V
I
OH
= −20
μA
20
V
OH
V
I
= V
IH
or V
IL
I
OH
= −4 mA
I
OH
= −5.2 mA
I
OL
= 20
μA
V
OL
V
I
= V
IH
or V
IL
I
OL
= 4 mA
I
OL
= 5.2 mA
I
I
I
CC
C
i
V
I
= V
CC
or 0
V
I
= V
CC
or 0,
I
O
= 0
4.5 V
6V
4.5 V
6V
2V
4.5 V
6V
4.5 V
6V
6V
6V
2 V to 6 V
3
T
A
= 25°C
MIN
1.9
4.4
5.9
3.98
5.48
TYP
1.998
4.499
5.999
4.3
5.8
0.002
0.001
0.001
0.17
0.15
±0.1
0.1
0.1
0.1
0.26
0.26
±100
8
10
MAX
SN54HC138
MIN
1.9
4.4
5.9
3.7
5.2
0.1
0.1
0.1
0.4
0.4
±1000
160
10
MAX
SN74HC138
MIN
1.9
4.4
5.9
3.84
5.34
0.1
0.1
0.1
0.33
0.33
±1000
80
10
nA
μA
pF
V
V
MAX
UNIT
4
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