CD74HCT251E Logic Multiplexer by Texas Instruments

The CD74HCT251E is a high-performance CMOS logic 8-input multiplexer with three-state outputs from Texas Instruments. This device is part of the HCT (High-Speed CMOS, TTL-Compatible) family, which is designed to provide the speed of CMOS technology along with the compatibility to TTL electrical levels. The CD74HCT251E is a versatile component suitable for a wide range of digital applications, including data selection, data routing, and function generation.

Featuring a single 8-input multiplexer with a binary address decoding scheme, the CD74HCT251E allows one of the eight inputs to be selected and presented at the output. The selection is determined by the address inputs A0, A1, and A2. Additionally, an enable input (E) is provided to control the state of the multiplexer; when E is high, the output is in the high-impedance state, regardless of the other inputs, allowing for the connection of multiple outputs to a common bus without interference.

The device operates with a wide supply voltage range from 4.5V to 5.5V, which is typical for 5V digital systems, and its low power consumption makes it suitable for battery-operated and low-power systems. The CD74HCT251E features a balanced propagation delay and transition times, which ensures reliable and fast operation even in demanding applications.

Encased in a standard DIP (Dual In-line Package), the CD74HCT251E is easy to handle and integrate into various electronic circuits. The pin configuration is designed for straightforward PCB (Printed Circuit Board) layout and is compatible with other standard logic devices, making it a flexible choice for system designers.

With its robust design and compatibility with the TTL logic level, the CD74HCT251E from Texas Instruments is an excellent choice for designers looking to implement an efficient and reliable multiplexing solution in their digital systems. Whether used in communication equipment, data processing, or instrumentation, this multiplexer is engineered to meet the stringent requirements of modern electronic applications.