SN74LS21, Texas Instruments
SN54LS21, SN74LS21 DUAL 4-INPUT POSITIVE-AND GATES
SDLS139 – APRIL 1985 – REVISED MARCH 1988
PRODUCTION DATA information is current as of publication.
SN74LS221, Motorola
DUAL MONOSTABLE
MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
Each multivibrator of the LS221 features a negative-transition-triggered input and a positi.
SN74LS221, ON Semiconductor
SN74LS221 Dual Monostable Multivibrators with Schmitt-Trigger Inputs
Each multivibrator of the LS221 features a negative-transitiontriggered input and.
