SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521
8-BIT IDENTITY COMPARATORS
SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
: Q inputs V
CC
+ 0.5 V or 5.5 V, whichever is less. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
All other inputs 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Off-state output voltage 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
: SN74ALS518 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
SN74ALS518
MIN NOM MAX
V
CC
Supply voltage 4.5 5 5.5 V
V
IH
High-level input voltage 2 V
V
IL
Low-level input voltage 0.8 V
V
OH
High-level output voltage 5.5 V
I
OL
Low-level output current 24 mA
T
A
Operating free-air temperature 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN74ALS518
MIN TYP
‡
MAX
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.5 V
I
OH
V
CC
= 5.5 V, V
OH
= 5.5 V 0.1 mA
I
OL
= 12 mA 0.25 0.4
OL
CC
=
.
I
OL
= 24 mA 0.35 0.5
Q inputs
V
I
= 5.5 V 0.1
I
All other inputs
CC
=
.
V
I
= 7 V 0.1
Q inputs
–0.2 mA
IH
All other inputs
CC
=
.
,
I
=
.
20 µA
Q inputs
–0.6
IL
All other inputs
CC
=
.
,
I
=
.
–0.1
I
CC
V
CC
= 5.5 V, See Note 1 11 17 mA
‡
All typical values are at V
CC
= 5 V, T
A
= 25°C.
NOTE 1: I
CC
is measured with G
grounded, and P and Q at 4.5 V.
