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74HC Family Counters & Shift Registers, Texas Instruments Texas Instruments range of Counters and Shift Registers from the 74HC Family of CMOS Logic ICs. The 74HC Family use silicon gate CMOS technology to achieve operating speeds similar to the LSTTL family but with the low power consumption of standard CMOS integrated circuits. High-Speed CMOS Logic Operating Voltage: 2 to 6 V Compatibility: Input CMOS, Output CMOS