SN74ALS280, SN74AS280

9BIT PARITY GENERATORS/CHECKERS

SDAS038C − DECEMBER 1982 − REVISED DECEMBER 1994

3

POST OFFICE BOX 655303

POST OFFICE BOX 1443

recommended operating conditions

SN74ALS280

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

IOH

High-level output current

− 2.6

mA

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

SN74ALS280

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = − 18 mA

− 1.5

V

VOH

VCC = 4.5 V to 5.5 V,

IOH = − 0.4 mA

VCC −2

V

VOH

VCC = 4.5 V,

IOH = − 2.6 mA

2.4

3.3

V

VOL

VCC = 4.5 V

IOL = 12 mA

0.25

0.4

V

VOL

VCC = 4.5 V

IOL = 24 mA

0.35

0.5

V

II

VCC = 5.5 V,

VI = 7 V

0.1

mA

IIH

VCC = 5.5 V,

VI = 2.7 V

20

µA

IIL

VCC = 5.5 V,

VI = 0.4 V

− 0.1

mA

IO‡

VCC = 5.5 V,

VO = 2.25 V

−30

−112

mA

ICC

VCC = 5.5 V

10

16

mA

† 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.

switching characteristics (see Figure 1)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

TA = MIN to MAX§

UNIT

PARAMETER

(INPUT)

(OUTPUT)

SN74ALS280

UNIT

MIN

MAX

tPLH

Any

Σ EVEN

3

20

ns

tPHL

Any

Σ EVEN

3

20

ns

tPLH

Any

Σ ODD

3

20

ns

tPHL

Any

Σ ODD

4

22

ns

§ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.