74HCT138N,652

Signal Switches, Multiplexers, Decoders Overview

The 74HCT138N,652 is a 3-to-8 line decoder and demultiplexer manufactured by Nexperia. It decodes three binary weighted address inputs (A0, A1, A2) to eight mutually exclusive active LOW outputs (Y0 to Y7). The device features three enable inputs: E1 and E2 are active LOW, while E3 is active HIGH. All outputs remain HIGH unless E1 and E2 are LOW and E3 is HIGH. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides three-to-eight line decoding with mutually exclusive active LOW outputs
• Features multiple enable inputs for easy parallel expansion capabilities
• Supports demultiplexing functionality using enable inputs as data or strobes
• Compatible with TTL input levels

Signal Switches, Multiplexers, Decoders Applications

• Memory chip select decoding
• Demultiplexing applications
• Parallel expansion to larger decoders

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific package type against the datasheet ordering information, as the 'N' suffix typically denotes a PDIP package which may not be listed in the latest revision table. Confirm that the manufacturer is Nexperia, as NXP's standard product business was rebranded. Ensure the component meets the required operating temperature range and voltage specifications for your application design.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when TTL-compatible logic levels are required for the address inputs. The HCT series ensures compatibility with standard TTL devices while utilizing CMOS technology. Consider the available package options such as SO16, TSSOP16, or DHVQFN16 based on board space constraints. Verify that the application requires active LOW outputs and utilizes the enable pins for control logic.

Signal Switches, Multiplexers, Decoders Part Context

This component belongs to the 74HCT family of logic integrated circuits produced by Nexperia. The family includes various logic functions such as decoders, flip-flops, and gates. The 74HCT138 specifically addresses the need for efficient address decoding in digital systems. It is part of a broader portfolio designed for industrial, computing, and consumer markets.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74HC138N,652 serves as a direct functional replacement if CMOS input levels are acceptable instead of TTL levels. Other variants like 74HCT138D or 74HCT138PW offer different package types but maintain identical electrical characteristics.