KK74ACT253 Overview
KK74ACT253 Dual 4-Input Data Selector/Multiplexer with 3-State Otputs High-Speed Silicon-Gate CMOS The KK74ACT253 is identical in pinout to the LS/ALS253, HC/HCT253. The KK74ACT253 may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs. The Address Inputs select one of four Data Inputs from each multiplexer.