M74HC670B1

4 x 4 Register File with 3-State Outputs (Standard High-Speed CMOS) manufactured by STMicroelectronics. This 16-pin digital logic component features the exact same 16-bit multi-register architecture, dual independent read/write address ports, and pin layout as the previous item, but operates on standard High-Speed CMOS (HC) logic thresholds rather than TTL matching parameters. It functions identically to cache and route 4-bit binary nibbles across high-speed bus paths at sub-nanosecond propagation speeds, standard across industrial automation controllers, high-volume memory bank selectors, and classic arcade game boards. (Industry Equals: STMicroelectronics M74HC670B1R, Texas Instruments SN74HC670N, NXP 74HC670N, Toshiba TC74HC670AP, onsemi MC74HC670N, Fairchild MM74HC670N).