74HC Series Logic – Texas Instruments SN74HC374N, This Texas Instruments 74HC374 Tristate octal D-type flip flop IC is available in a DIL-20 package. A part of the 74HC range. The M74HC374 is a high speed CMOS octal D-type flip flop with 3-State outputs non-inverting. Texas Instruments SN74HC374N Tri-State Octal D-Type Flip Flop