ON Semiconductor 74HC138D/N: 3-to-8 Line Decoder/Demultiplexer

The ON Semiconductor 74HC138D/N is a high-speed Si-gate CMOS device that is designed to be used in high-performance decoding or demultiplexing applications. This integrated circuit is part of the 74HC series, known for its robustness and compatibility with a wide range of digital systems. The 74HC138D/N is designed to accept three binary weighted address inputs (A0, A1, and A2) and, when enabled, provides eight mutually exclusive active-LOW outputs (Y0 to Y7).

The device features three enable inputs: two active-LOW (E1, E2) and one active-HIGH (E3). All outputs will be high unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four 74HC138 devices and one inverter. The device can also be used as an 8-output demultiplexer by using one of the active LOW enable inputs as the data input while the remaining two enable inputs as the select lines.

Constructed with ON Semiconductor's commitment to quality, the 74HC138D/N offers a standard pinout and is housed in a SOIC-16 package, making it easy to integrate into various circuit designs. The device operates over a wide voltage range from 2.0 to 6.0 volts and features low power consumption, with a typical quiescent current of only 4µA, making it suitable for battery-operated systems.

Key features of the ON Semiconductor 74HC138D/N include:

• Decodes a 3-bit address to 8 active-LOW outputs
• Multiple enable inputs for easy expansion and demultiplexing
• Wide operating voltage range (2.0V to 6.0V)
• Low power consumption
• High noise immunity characteristic of CMOS devices
• Output capability: standard
• ICC category: MSI

Overall, the 74HC138D/N is a versatile and reliable component suitable for a variety of digital applications, including computer systems, robotics, and other logic-based interfaces. Its ease of use, combined with ON Semiconductor's reputation for high-quality components, makes it a valuable addition to any electronic project requiring a 3-to-8 line decoding or demultiplexing solution.