SN54LS221

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-transitiontriggered 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 1B 1CLR 1Q 2Q 2Cext 2Rext/Cext GND 1 2 3 4 5 6 7 8 16 VCC 15 1Rext/Cext 14 1Cext 13 1Q 12 2Q 11 2CLR 10 2B 9 2A SN54LS221 . . . FK PACKAGE (TOP VIEW) 1B 1A NC VCC 1Rext /Cext 1CLR 1Q NC 2Q 2Cext 3 2 1 20 19 4 18 5 17 6 16 7 15 8 14 9 10 11 12 13 1Cext 1Q NC 2Q 2CLR 2Rext/Cext GND NC 2A 2B 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 S...