ON Semiconductor 74VHC138N 3-to-8 Line Decoder/Demultiplexer

The ON Semiconductor 74VHC138N is a high-performance, CMOS 3-to-8 line decoder/demultiplexer integrated circuit designed to address the need for multiple decoding in a wide range of applications. This versatile component is particularly useful in systems where high speed, low power consumption, and minimal propagation delay times are crucial.

The 74VHC138N is capable of converting three binary input signals to eight mutually exclusive outputs. The device features three enable inputs: two active-low (E1, E2) and one active-high (E3). The outputs are designed to be active low, which ensures that only one output will be active at any given time when the enable conditions are satisfied, making it ideal for memory chip selection, data routing, and control applications where minimal output overlap is essential.

With its advanced silicon-gate CMOS technology, the 74VHC138N offers a significant advantage in terms of speed and power consumption over its predecessors. The device boasts a typical propagation delay time of only 8.5ns, allowing for rapid signal processing and reduced wait times in high-speed systems. Additionally, the low power dissipation makes it suitable for battery-operated equipment and energy-efficient designs.

Key features of the 74VHC138N include:

• High-speed operation: t<sub>PD = 8.5ns (typ) at V<sub>CC = 5V
• Low power dissipation: I<sub>CC = 4µA (max) at T<sub>A = 25°C
• Power down protection is provided on all inputs and outputs
• Pin and function compatible with other standard logic families
• Multiple package options for design flexibility

The device is housed in a 16-pin DIP (Dual In-line Package), making it easy to integrate into both prototyping and production environments. The 74VHC138N is also available in other package types to suit various assembly and space requirements.

Whether you are designing complex digital systems or simple interface circuits, the ON Semiconductor 74VHC138N provides a reliable and efficient solution for your decoding and demultiplexing needs.