SN54221, SN54LS221, SN74221, SN74LS221

DUAL MONOSTABLE MULTIVIBRATORS

WITH SCHMITT TRIGGER INPUTS

SDLS213B − DECEMBER 1983 − REVISED NOVEMBER 2004

1

POST OFFICE BOX 655303

and SN74121 One Shots

Electrical and Switching Characteristics

That Are Virtually Identical to the SN54121

and SN74121 One Shots

SN74123, SN54LS123, and SN74LS123

TYPE

MAXIMUM

OUTPUT

PULSE

LENGTH(S)

SN54221

21

SN74221

28

SN54LS221

49

SN74LS221

70

description/ordering information

The

’221

and

’LS221

devices

are

dual

multivibrators with performance characteristics

virtually identical to those of the ’121 devices.

Each multivibrator features a negative-transition-

triggered input and a positive-transition-triggered

input, either of which can be used as an inhibit

input.

ORDERING INFORMATION

TA

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP − N

Tube

SN74221N

SN74221N

PDIP − N

Tube

SN74LS221N

SN74LS221N

0

°C to 70°C

SOIC − D

Tube

SN74LS221D

LS221

0

°C to 70°C

SOIC − D

Tape and reel

SN74LS221DR

LS221

SOP − NS

Tape and reel

SN74LS221NSR

74LS221

SSOP − DB

Tape and reel

SN74LS221DBR

LS221

CDIP − J

Tube

SNJ54221J

SNJ54221J

−55

°C to 125°C

CDIP − J

Tube

SNJ54LS221J

SNJ54LS221J

−55 C to 125 C

LCCC − FK

Tube

SNJ54LS221FK

SNJ54LS221FK

† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are

available at www.ti.com/sc/package.

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.

32

1 20 19

9 10 11 12 13

4

5

6

7

8

18

17

16

15

14

1Q

NC

2Q

2CLR

1CLR

1Q

NC

2Q

1A

1B

1CLR

1Q

2Q

GND

1Q

2Q

2CLR

2B

2A

SN54221, SN54LS221 ...J PACKAGE

SN74221 ...N PACKAGE

SN74LS221 . . . D, DB, N, OR NS PACKAGE

(TOP VIEW)

SN54LS221 . . . FK PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

NC − No internal connection

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.

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.