SN54173, SN54LS173A, SN74173, SN74LS173A 4-BIT D-T.
Texas Instruments
SN74173 - 4-BIT D-TYPE REGISTERS
SN54173, SN54LS173A, SN74173, SN74LS173A 4-BIT D-TYPE REGISTERS WITH 3-STATE OUTPUTS SDLS067A – OCTOBER 1976 – REVISED JUNE 1999 D 3-State Outputs In.