74AC138SCX_SF501499

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74AC138SCX is a 1-of-8 decoder and demultiplexer belonging to the 74AC logic series. It features three address inputs and eight active-low outputs, housed in a 16-pin SOIC package. The device operates within a supply voltage range of 2 V to 6 V and supports surface-mount installation. It functions across an industrial temperature range from -40°C to +85°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides decoding and demultiplexing functionality with one input line and eight output lines.
• Features active-low mutually exclusive outputs for precise signal selection.
• Supports standard CMOS processes compatible with AC logic family specifications.

Signal Switches, Multiplexers, Decoders Applications

• Address decoding in microprocessor-based systems
• Data distribution in digital communication circuits
• Memory chip select generation

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix against official documentation to confirm exact packaging or tape-and-reel specifications. Confirm RoHS compliance status through current manufacturer declarations. Ensure the ordering code matches the required pin configuration and package dimensions for your PCB layout.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a wide supply voltage range including lower voltages than standard TTL is required. The AC series offers higher speed performance compared to older HC variants while maintaining CMOS power efficiency. Verify that the 16-pin SOIC footprint aligns with available assembly equipment capabilities.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the broader 74AC138 family of decoders manufactured by onsemi. Variants may differ in package types such as DIP or TSSOP, or suffixes indicating specific reel quantities. The SCX designation specifically identifies the SOIC surface-mount package variant within this product line.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct substitutes include MC74AC138DR2G from onsemi. Other manufacturers offer equivalent parts like CD74ACT138M from Texas Instruments, though ACT series parameters differ slightly from AC specifications.