DM74ALS138N

Signal Switches, Multiplexers, Decoders Overview

The DM74ALS138N is a 3-to-8 line decoder/demultiplexer manufactured by onsemi, utilizing an Advanced Oxide-Isolated Schottky TTL process. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a free air operating temperature from 0 °C to +70 °C. The device features three binary select inputs (A, B, C) and three enable inputs (G1, G2A, G2B). Propagation delays are specified with maximum values of 8 ns for HIGH-to-LOW transitions and 2 ns for LOW-to-HIGH transitions at VCC = 4.5V to 5.5V. It is housed in a 16-Lead Plastic Dual-In-Line Package (PDIP).

Signal Switches, Multiplexers, Decoders Feature Summary

• Incorporates three enable inputs to simplify cascading and data reception without external gates.
• Features fully buffered inputs presenting only one normalized load to the driving circuit.
• Inputs are clamped with high-performance Schottky diodes to suppress line-ringing.

Signal Switches, Multiplexers, Decoders Applications

• High-performance memory decoding systems
• Data routing applications requiring short propagation delay times
• Expansion of decoders to implement 24-line or 32-line configurations

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific manufacturer origin, as the datasheet indicates Fairchild Semiconductor Corporation authorship while current branding may differ. Confirm package integrity for the PDIP-16 configuration upon receipt. Ensure compliance with the life support policy restrictions if intended for critical implant or life-sustaining systems. Validate RoHS status through official documentation prior to integration.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when low power dissipation and high-speed switching are required for memory decoding. The ALS logic family offers superior performance compared to standard TTL. Verify that the system voltage remains within the 4.5 V to 5.5 V range. Consider the PDIP-16 package constraints for through-hole mounting requirements in the target design.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the 74ALS logic family, characterized by advanced oxide-isolated ion-implanted Schottky technology. It serves as a direct functional equivalent to other industry-standard 3-to-8 decoders within the same logic family. The N suffix specifically denotes the 16-Lead Plastic Dual-In-Line Package format.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74ALS138AN