SN74121DR by Texas Instruments, 4.75 V ~ 5.25 V supply voltage, in 14-SOIC (0.154", 3.90mm Width) package, rated for 0°C ~ 70°C. This part is discontinued. FPGACenter specializes in sourcing obsolete components.
SN74121NSR by Texas Instruments, 4.75 V ~ 5.25 V supply voltage, in 14-SOIC (0.209", 5.30mm Width) package, rated for 0°C ~ 70°C. This part is discontinued. FPGACenter specializes in sourcing obsolete components.
SN74121NSRE4 by Texas Instruments, 4.75 V ~ 5.25 V supply voltage, in 14-SOIC (0.209", 5.30mm Width) package, rated for 0°C ~ 70°C. This part is discontinued. FPGACenter specializes in sourcing obsolete components.
SN74121NSRG4 by Texas Instruments, 4.75 V ~ 5.25 V supply voltage, in 14-SOIC (0.209", 5.30mm Width) package, rated for 0°C ~ 70°C. This part is discontinued. FPGACenter specializes in sourcing obsolete components.
SN74AHC123ADG4 by Texas Instruments, 2 V ~ 5.5 V supply voltage, in 16-SOIC (0.154", 3.90mm Width) package, rated for -40°C ~ 85°C, part of the 74AHC series.