74HC51

The 74HC51 is a high-speed CMOS logic integrated circuit that consolidates multiple 2-to-1 multiplexers into a single, compact package. It is engineered for efficient digital signal routing in applications where minimal propagation delay and reduced component count are priorities. Key electrical characteristics include a supply voltage range of 2V to 6V, a maximum propagation delay of 12 ns at 5V, and a rated maximum operating temperature of 85°C. The device contains eight independent multiplexers, enabling dense signal switching on limited PCB area while simplifying interconnects. Built with advanced CMOS fabrication techniques, the 74HC51 delivers fast switching performance combined with low static power dissipation. Its high noise immunity—specified at 28% of VCC—helps maintain signal integrity in electrically noisy environments and supports reliable operation across diverse system conditions. Compared with earlier multiplexer models, the 74HC51 offers improved switching speeds and lower power consumption without increasing package count. This integration reduces board complexity and assembly effort, making the device suitable for digital designs that demand compact, efficient multiplexing. Designers can leverage the 74HC51 where multiple 2-to-1 selection functions are required within a constrained footprint, or where consolidation of discrete multiplexers will simplify routing and lower overall system power. The combination of eight internal multiplexers, broad supply compatibility, and established CMOS characteristics makes the 74HC51 a practical choice for many modern digital circuits.