SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521

8-BIT IDENTITY COMPARATORS

SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995

5

POST OFFICE BOX 655303

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

All other inputs

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Off-state output voltage

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

UNIT

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

VOH

High-level output voltage

5.5

V

IOL

Low-level output current

24

mA

TA

Operating free-air temperature

0

70

°C

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

SN74ALS518

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP‡

MAX

UNIT

VIK

VCC = 4.5 V,

II = – 18 mA

– 1.5

V

IOH

VCC = 5.5 V,

VOH = 5.5 V

0.1

mA

VOL

VCC =4 5V

IOL = 12 mA

0.25

0.4

V

VOL

VCC = 4.5 V

IOL = 24 mA

0.35

0.5

V

II

Q inputs

VCC =5 5V

VI = 5.5 V

0.1

mA

II

All other inputs

VCC = 5.5 V

VI = 7 V

0.1

mA

I

Q inputs

VCC =5 5V

VI =2 7V

– 0.2

mA

IIH

All other inputs

VCC = 5.5 V,

VI = 2.7 V

20

µA

I

Q inputs

VCC =5 5V

VI =0 4V

– 0.6

mA

IIL

All other inputs

VCC = 5.5 V,

VI = 0.4 V

– 0.1

mA

ICC

VCC = 5.5 V,

See Note 1

11

17

mA

‡ All typical values are at VCC = 5 V, TA = 25°C.

NOTE 1: ICC is measured with G grounded, and P and Q at 4.5 V.