SDAS081C − APRIL 1982 − REVISED DECEMBER 1994
SN54ALS157A, SN54ALS158
SN74ALS157A, SN74ALS158, SN74AS157, SN74AS158
QUAD 1 OF 2 DATA SELECTORS/MULTIPLEXERS
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage, V
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Operating free-air temperature range, T
A
: SN54ALS157A, SN54ALS158 . . . . . . . . . . . . . . . −55°C to 125°C
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
MIN
VCC
VIH
VIL
IOH
IOL
TA
Supply voltage
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
Operating free-air temperature
−55
4.5
2
0.7
−0.4
4
125
0
NOM
5
MAX
5.5
SN74ALS157A
SN74ALS158
MIN
4.5
2
0.8
−0.4
8
70
NOM
5
MAX
5.5
V
V
V
mA
mA
°C
UNIT
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VOH
VOL
II
IIH
IIL
IO§
ICC
′ALS157A
′ALS158
TEST CONDITIONS
VCC = 4.5 V,
VCC = 4.5 V to 5.5 V,
VCC = 4.5 V
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
II = − 18 mA
IOH = − 0.4 mA
IOL = 4 mA
IOL = 8 mA
VI = 7 V
VI = 2.7 V
VI = 0.4 V
VO = 2.25 V
See Note 1
−20
6
5
SN54ALS157A
SN54ALS158
MIN
VCC − 2
0.25
0.4
0.1
20
−0.1
−112
11
10
−30
6
5
TYP‡
MAX
−1.2
VCC − 2
0.25
0.35
0.4
0.5
0.1
20
−0.1
−112
11
10
V
mA
µA
mA
mA
mA
SN74ALS157A
SN74ALS158
MIN
TYP‡
MAX
−1.2
V
V
UNIT
‡ All typical values are at VCC = 5 V, TA = 25°C.
§ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
NOTE 1: ICC is measured with 4.5 V applied to all inputs and all outputs open.
4
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