NEXPERIA 74HC238D 3-to-8 Line Decoder/Demultiplexer, SOIC-16

The NEXPERIA 74HC238D is a high-performance integrated circuit that functions as a 3-to-8 line decoder and demultiplexer, designed for robust digital logic applications within the HC logic family. This device efficiently decodes three binary-weighted address inputs (A0, A1, and A2) into eight mutually exclusive active-high outputs (Y0 to Y7). It features three enable inputs (E1, E2, and E3) for enhanced control, ensuring all outputs remain low unless E1 and E2 are low and E3 is high. This sophisticated multiple-enable architecture facilitates straightforward parallel expansion, allowing you to create a 1-of-32 line decoder using just four of these ICs and a single inverter.

Beyond decoding, the 74HC238D offers versatile demultiplexing capabilities. It can operate as an eight-output demultiplexer by using one of the active-low enable inputs as a data line while the remaining enables act as strobes. A key design feature is the inclusion of input clamp diodes, which permit the use of current-limiting resistors to safely interface inputs with voltage levels exceeding the Vcc supply, enhancing its resilience and integration flexibility in mixed-voltage environments.

This IC is characterised by its CMOS input levels and full compliance with the JEDEC 7A standard, ensuring reliable interoperability. Its excellent noise immunity and wide operating voltage range from 2V to 6V make it a dependable choice for complex digital systems. With an extended industrial temperature range, it is built to perform consistently in demanding conditions, providing a stable and precise logic solution for critical control and data routing tasks.