STMicroelectronics M74HC238B1R - 3-to-8 Line Decoder/Demultiplexer

The STMicroelectronics M74HC238B1R is a high-speed CMOS 3-to-8 line decoder/demultiplexer designed to address the need for multiple decoding in systems where hardware efficiency and reliability are required. This integrated circuit is part of the HC family, which means it combines silicon-gate CMOS technology with TTL-level compatibility, making it an ideal choice for interfacing with both CMOS and TTL logic levels.

The M74HC238B1R device features three binary weighted address inputs (A0, A1, and A2) and an enable input (E1) that, when held low, activates the decoding action. It also includes two additional enable inputs (E2 and E3) that must be held high to enable the device. When the selected input is enabled, one of the eight mutually exclusive outputs (Y0 to Y7) transitions to a low state, thus selecting the corresponding output line. The high drive capability of these outputs allows for direct drive of significant loads, such as LEDs or other display elements, without the need for additional driver components.

With its wide operating voltage range of 2V to 6V, the M74HC238B1R is versatile enough to be used in a variety of digital applications, including computer systems, data multiplexing, memory address decoding, and control signal generation. The low power consumption and balanced propagation delays ensure efficient operation in battery-powered devices and high-speed processing environments.

Offered in a standard 16-pin DIP package, the M74HC238B1R is easy to integrate into a wide array of PCB layouts. Its robust design ensures protection against latch-up through high ESD (Electrostatic Discharge) protection and immunity to noise, which is critical for maintaining the integrity of digital signals in electrically noisy environments.

Overall, the STMicroelectronics M74HC238B1R represents a reliable and cost-effective solution for systems requiring a high-performance 3-to-8 line decoder/demultiplexer. Its combination of speed, low power consumption, and compatibility with multiple logic families makes it a versatile component for both simple and complex digital circuit designs.