Catalog > Semiconductors > Integrated Circuits 7440 Buffer Dual 4-Input NAND Buffer Part No: 7440 5.23 ZAR inc for 1 Each (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Two 4-Input NAND Buffers Outputs Directly Interface to CMOS, NMOS and TTL Large Operating Voltage Range Wide Operating Conditions Not Recommended for New Designs