SN74S138ANE4

Signal Switches, Multiplexers, Decoders Overview

The SN74S138ANE4 is a Schottky-clamped 3-line to 8-line decoder/demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 4.75 V to 5.25 V and supports an operating temperature range of 0°C to +70°C. The device features three address inputs (A0, A1, A2) and eight active-low outputs (Y0–Y7). Control is managed via two active-low enable inputs (G1, G2A, G2B), ensuring only one output is selected at any time. The component is housed in a 16-pin PDIP package.

Signal Switches, Multiplexers, Decoders Feature Summary

• Schottky clamping provides high-speed switching performance with reduced power consumption compared to standard TTL logic families.

Signal Switches, Multiplexers, Decoders Applications

• Address decoding for memory-mapped I/O systems
• Demultiplexing data streams in digital communication circuits
• Control signal generation in industrial automation equipment

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix 'E4' indicates lead-free composition and RoHS compliance as per manufacturer standards. Confirm the package type matches the required PCB footprint. Check current production status and lifecycle stage before finalizing procurement plans.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when high-speed decoding is required within standard 5V logic environments. Ensure the design accommodates the specific enable logic requirements and output drive capabilities defined in the datasheet. Verify thermal management meets the specified operating temperature limits.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN54/74S138 family of decoders. It is functionally compatible with other variants in the series but offers distinct speed and power characteristics due to its Schottky technology. It serves as a core logic element for address selection tasks in complex digital systems.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74LS138ANE4: Offers similar functionality with lower power consumption but slower switching speeds. SN74HC138: Provides CMOS compatibility with wider voltage ranges but different input/output characteristics. Verify pinout and electrical parameters match system requirements before substitution.