Philips Semiconductors FAST Products

Product specification

74F40

Dual 4-input NAND buffer

1

April 11, 1989

853–0053 96314

TYPE

TYPICAL

PROPAGATION

DELAY

TYPICAL

SUPPLY CURRENT

(TOTAL)

74F40

3.5ns

6mA

ORDERING INFORMATION

DESCRIPTION

COMMERCIAL RANGE

14-pin plastic DIP

N74F40N

14-pin plastic SO

N74F40D

PIN CONFIGURATION

14

13

12

11

10

9

8

7

6

5

4

3

2

1

GND

D1b

D1a

Q1

NC

D1d

D1c

D0a

D0b

Q0

NC

D0c

D0d

SF00065

INPUT AND OUTPUT LOADING AND FAN OUT TABLE

PINS

DESCRIPTION

74F (U.L.) HIGH/LOW

LOAD VALUE HIGH/LOW

Dna, Dnb, Dnc, Dnd

Data inputs

1.0/2.0

20

µA/1.2mA

Q0, Q1

Data outputs

750/106.7

15mA/64mA

NOTE: One (1.0) FAST unit load is defined as: 20

µA in the High state and 0.6mA in the Low state.

LOGIC DIAGRAM

GND = Pin 7

NC = Pin 3, 11

SF00081

Q0

6

1

2

4

D0a

D0b

D0c

5

D0d

Q1

8

9

10

12

D1a

D1b

D1c

13

D1d

FUNCTION TABLE

INPUTS

OUTPUT

Dna

Dnb

Dnc

Dnd

Qn

L

X

X

X

H

X

L

X

X

H

X

X

L

X

H

X

X

X

X

H

H

H

H

H

L

NOTES:

1. H = High voltage level

2. L = Low voltage level

3. X = Don’t care

LOGIC SYMBOL

D1a D1b

D0a D0b D0c

D1c D1d

D0d

Q0 Q1

6

8

1

2

4

5

9

10

12

13

GND = Pin 7

NC = Pin 3, 11

SF00082

IEC/IEEE SYMBOL

SF00083

&

6

8

1

2

4

5

9

10

12

13