Image shown is a representation only.Exact specifications should be obtained from the product datasheet. SN74LS640 Stock Available: 0 Produc variants Default Title - Sold Out Qty. Sold Out Couldn't load pickup availability Refresh Part Number SN74LS640 Manufacturer Texas Instruments Description Octal Bus Transceiver Package/Case PDIP-20 Package Tube Datasheet Internal reference: D3-24