SN74LV221AD brand manufacturers: National Semiconductor, Elecinsight stock, SN74LV221AD reference price.National Semiconductor. SN74LV221AD parameters, SN74LV221AD Datasheet PDF and pin diagram description download.You can use the SN74LV221AD Logic - Multivibrators, DSP Datesheet PDF, find SN74LV221AD pin diagram and circuit diagram and usage method of function,SN74LV221AD electronics tutorials.You can download from the Elecinsight.