BUY MB74LS10 https://www.utsource.net/itm/p/4649852.html

(DIP-14,F) Description: The MB74LS10 is a 14-pin DIP (Dual Inline Package) logic gate IC (Integrated Circuit) from the 74LS family. It is a 4-input NAND gate with Schmitt-trigger inputs. Features: Low power consumption High noise immunity Inputs are Schmitt-triggered Outputs are open-collector Outputs can be connected together for wired-OR operation Package type: DIP-14 Applications: Digital logic circuits Signal conditioning Data processing Pulse generation Timing circuits (For reference only)