CD54HC166, CD54HCT166, CD74HC166, CD74HCT166 SCHS1.
Texas Instruments
CD74HCT166E - 8-Bit Parallel-In/Serial-Out Shift Register
CD54HC166, CD54HCT166, CD74HC166, CD74HCT166 SCHS157D – FEBRUARY 1998 – REVISED FEBRUARY 2022 CDx4HC(T)166 High-Speed CMOS Logic 8-Bit Parallel-In/Ser.