SN54147, SN54148, SN54LS147, SN54LS148

SN74147, SN74148 (TIM9907), SN74LS147, SN74LS148

10LINE TO 4LINE AND 8LINE TO 3LINE PRIORITY ENCODERS

SDLS053B − OCTOBER 1976 − REVISED MAY 2004

1

POST OFFICE BOX 655303

’147, ’LS147

− Keyboard Encoding

− Range Selection

’148, ’LS148

(Octal)

− n-Bit Encoding

− Code Converters and Generators

32

1 20 19

910 11 1213

4

5

6

7

8

18

17

16

15

14

D

3

NC

2

1

6

7

NC

8

C

SN54LS147 ...FK PACKAGE

(TOP VIEW)

NC − No internal connection

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

4

5

6

7

8

C

B

GND

NC

D

3

2

1

9

A

SN54147, SN54LS147 ...J OR W PACKAGE

SN74147, SN74LS147 ...D OR N PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

4

5

6

7

EI

A2

A1

GND

E0

GS

3

2

1

0

A0

SN54148, SN54LS148 ...J OR W PACKAGE

SN74148, SN74LS148 . . . D, N, OR NS PACKAGE

(TOP VIEW)

32

1 20 19

910 11 12 13

4

5

6

7

8

18

17

16

15

14

GS

3

NC

2

1

6

7

NC

EI

A2

SN54LS148 . . . FK PACKAGE

(TOP VIEW)

TYPE

TYPICAL

DATA

DELAY

TYPICAL

POWER

DISSIPATION

’147

10 ns

225 mW

’148

10 ns

190 mW

’LS147

15 ns

60 mW

’LS148

15 ns

60 mW

NOTE: The SN54147, SN54LS147, SN54148, SN74147, SN74LS147, and SN74148 are obsolete and are no longer supplied.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Copyright

 2004, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

On products compliant to MILPRF38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.