SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623

OCTAL BUS TRANSCEIVERS

SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995

5

POST OFFICE BOX 655303

switching characteristics (see Figure 1)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

R1 = 500

R2 = 500

TA = MIN to MAX†

UNIT

SN74ALS620A

SN74ALS623A

MIN

MAX

MIN

MAX

tPLH

A

B

2

10

2

13

ns

tPHL

A

B

2

10

3

11

ns

tPLH

B

A

2

10

2

13

ns

tPHL

B

A

2

10

3

11

ns

tPZH

OEBA

A

3

17

5

22

ns

tPZL

OEBA

A

5

25

5

22

ns

tPHZ

OEBA

A

2

12

2

16

ns

tPLZ

OEBA

A

3

18

2

19

ns

tPZH

OEAB

B

3

18

5

22

ns

tPZL

OEAB

B

5

25

5

22

ns

tPHZ

OEAB

B

2

12

2

16

ns

tPLZ

OEAB

B

3

18

2

19

ns

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

7 V

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

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

SN74ALS621A

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

IOL

Low-level output current

48§

mA

TA

Operating free-air temperature

0

70

°C

§ Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V