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SN74LS164DR brand manufacturers: National Semiconductor, Twicea stock, SN74LS164DR reference price.National Semiconductor. SN74LS164DR parameters, SN74LS164DR Datasheet PDF and pin diagram description download.You can use the SN74LS164DR Logic - Shift Registers, DSP Datesheet PDF, find SN74LS164DR pin diagram and circuit diagram and usage method of function,SN74LS164DR electronics tutorials.You can download from the Twicea.