Catalog > Semiconductors > Integrated Circuits 74LS40 IC Gate NAND Dual 4-Input 14PD Part No: 74LS40 0.97 ZAR inc for 1 Each (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Specifications Operating Voltage: 4.75V-5.25V (Typical 5V) Number of Pins: 14 Logic Family: TTL Functions: Two independent 4-input NAND gates with enhanced output drive capability Inputs/Outputs: 2x 4-input, 2x 1-output