ON Semiconductor MC74HCT138ADR2 - 3-to-8 Line Decoder/Demultiplexer

The ON Semiconductor MC74HCT138ADR2 is a high-performance, 3-to-8 line decoder/demultiplexer designed to be used in a wide array of digital applications. This integrated circuit is part of the HCT family, which means it is compatible with standard CMOS logic levels and offers TTL input compatibility when operated within the voltage range of 4.5V to 5.5V. The MC74HCT138ADR2 is a logical choice for systems requiring the conversion of a binary-coded signal into a one-out-of-eight output, with each output being able to sink 25mA to drive LEDs or other display elements.

Featuring three binary select inputs (A, B, and C), the MC74HCT138ADR2 can decode up to eight unique output lines. It is also equipped with three enable inputs: two active-low (G1, G2A) and one active-high (G2B). This configuration ensures that the device remains in a low-output state when the enable conditions are not met, helping to prevent unintended activation of the outputs.

The device comes in a surface-mount SOIC-16 package, allowing for efficient use of PCB space in compact electronic designs. The MC74HCT138ADR2 is characterized for operation from -55°C to +125°C, making it suitable for industrial applications where temperature extremes are a concern. With its fast propagation delay and high noise immunity, this decoder/demultiplexer is an excellent solution for systems that demand reliable performance and low power consumption.

Applications for the MC74HCT138ADR2 include, but are not limited to, memory chip select decoding, data routing, and control interface for microprocessors. Its ability to serve as a demultiplexer also makes it a useful component for distributing serial data to multiple outputs or for simplifying the design of combinatorial logic circuits.

ON Semiconductor's commitment to quality ensures that the MC74HCT138ADR2 meets stringent standards, providing designers with a dependable and versatile component for their digital logic needs.