As an Amazon Associate, we earn from qualifying purchases. N74LS540N - Signetics Signetics . N74LS540N Gallery Attributes Brand name, Manufacturer name, ManufacturerSignetics Extra Product NameN74LS540N - Signetics moq, multiple1 MPN, SKUN74LS540N qtyInStock0 snippetN74LS540N In-Stock. Request a quote for the part number# N74LS540N. Call 877-240-8595 to order. Same day shipping on in-stock parts. Distributor offers SellerSKUMOQIn stockMultiplePrices 4 Star ElectronicsN74LS540N11 1SourceN74LS540N11