ꢀꢁ ꢂ ꢃꢄ ꢅ ꢀꢆ ꢂ ꢇꢄ ꢈ ꢉ ꢀꢁ ꢂꢃ ꢄꢅ ꢀ ꢆ ꢂ ꢊ
ꢀꢁ ꢇ ꢃꢄ ꢅ ꢀꢆ ꢂ ꢇꢄ ꢈ ꢉ ꢀꢁ ꢇꢃ ꢄꢅ ꢀ ꢆ ꢂ ꢊ ꢈꢉ ꢀ ꢁꢇ ꢃ ꢄꢀ ꢆ ꢂ ꢇ ꢈ ꢉꢀ ꢁ ꢇꢃ ꢄꢀ ꢆꢂ ꢊ
ꢋꢌ ꢄ ꢍꢉ ꢆ ꢑꢒꢓ ꢑꢔꢉ ꢍ ꢄꢕꢄꢉ ꢀ ꢐꢅ ꢐꢖ ꢕꢒ ꢎꢀ ꢗꢘ ꢌꢅꢕ ꢙꢏ ꢅꢐ ꢚꢐꢎꢀ
SDAS081C − APRIL 1982 − REVISED DECEMBER 1994
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
I
Operating free-air temperature range, T : SN54ALS157A, SN54ALS158 . . . . . . . . . . . . . . . −55°C to 125°C
A
SN74ALS157A, SN74ALS158 . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN54ALS157A
SN54ALS158
SN74ALS157A
SN74ALS158
UNIT
MIN NOM
MAX
MIN NOM
MAX
V
V
V
Supply voltage
4.5
2
5
5.5
4.5
2
5
5.5
V
V
CC
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
Operating free-air temperature
IH
0.7
−0.4
4
0.8
−0.4
8
V
IL
I
I
mA
mA
°C
OH
OL
T
A
−55
125
0
70
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54ALS157A
SN54ALS158
SN74ALS157A
SN74ALS158
PARAMETER
TEST CONDITIONS
UNIT
‡
‡
MIN TYP
MAX
MIN TYP
MAX
V
V
V
V
= 4.5 V,
I = −18 mA
−1.2
−1.2
V
V
IK
CC
I
= 4.5 V to 5.5 V,
I
I
I
= −0.4 mA
= 4 mA
V
CC
−2
V
CC
−2
OH
CC
OH
OL
OL
0.25
0.4
0.25
0.35
0.4
0.5
V
OL
V
CC
= 4.5 V
V
= 8 mA
I
I
I
I
V
V
V
V
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
V = 7 V
0.1
20
0.1
mA
µA
I
CC
CC
CC
CC
I
V = 2.7 V
I
20
IH
IL
V = 0.4 V
I
−0.1
−112
11
−0.1
−112
11
mA
mA
§
V
O
= 2.25 V
−20
−30
O
′ALS157A
′ALS158
6
5
6
5
I
V
CC
= 5.5 V,
See Note 1
mA
CC
10
10
‡
§
All typical values are at V
= 5 V, T = 25°C.
A
CC
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
.
OS
NOTE 1:
I
is measured with 4.5 V applied to all inputs and all outputs open.
CC
4
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
TI [ TEXAS INSTRUMENTS ]
