SN74LS221J Datasheet, PDF (1/27 Pages) Texas Instruments – DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUT

D Dual Versions of Highly Stable SN54121
and SN74121 One Shots
D SN54221 and SN74221 Demonstrate
Electrical and Switching Characteristics
That Are Virtually Identical to the SN54121
and SN74121 One Shots
D Pinout Is Identical to the SN54123,
SN74123, SN54LS123, and SN74LS123
D Overriding Clear Terminates Output Pulse
TYPE
SN54221
SN74221
SN54LS221
SN74LS221
MAXIMUM
OUTPUT
PULSE
LENGTH(S)
21
28
49
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.
SN54221, SN54LS221, SN74221, SN74LS221
DUAL MONOSTABLE MULTIVIBRATORS
WITH SCHMITTĆTRIGGER INPUTS
SDLS213B − DECEMBER 1983 − REVISED NOVEMBER 2004
SN54221, SN54LS221 . . . J PACKAGE
SN74221 . . . N PACKAGE
SN74LS221 . . . D, DB, N, OR NS PACKAGE
(TOP VIEW)
1A 1
1B 2
1CLR 3
1Q 4
2Q 5
2C_ext 6
2R_ext/C_ext 7
GND 8
16 V_CC
15 1R_ext/C_ext
14 1C_ext
13 1Q
12 2Q
11 2CLR
10 2B
9 2A
SN54LS221 . . . FK PACKAGE
(TOP VIEW)
1CLR
1Q
NC
2Q
2C_ext
3 2 1 20 19
4
18
5
17
6
16
7
15
8
14
9 10 11 12 13
1C_ext
1Q
NC
2Q
2CLR
NC − No internal connection
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N
Tube
SN74221N
SN74LS221N
SN74221N
SN74LS221N
0°C to 70°C
SOIC − D
Tube
Tape and reel
SN74LS221D
SN74LS221DR
LS221
SOP − NS
Tape and reel SN74LS221NSR
74LS221
SSOP − DB
Tape and reel SN74LS221DBR
LS221
CDIP − J
−55°C to 125°C
Tube
SNJ54221J
SNJ54LS221J
SNJ54221J
SNJ54LS221J
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.
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.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2004, Texas Instruments Incorporated
On products compliant to MILĆPRFĆ38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
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