DM74ALS253MX

Overview

The DM74ALS253MX is a dual 4-input multiplexer with 3-STATE outputs belonging to the Advanced Low-power Schottky (ALS) logic family. Manufactured by Fairchild Semiconductor, this component features two independent multiplexing circuits that select data from four sources using common select inputs. It operates within a supply voltage range of 4.5 V to 5.5 V and exhibits a propagation delay of 14 ns. The device is housed in a 16-pin SOIC package and supports surface mount installation.

Feature Summary

• Dual 4-input multiplexer architecture with common select inputs
• 3-STATE outputs allowing direct interface with bus-oriented systems
• Advanced Low-power Schottky technology for improved AC performance

Applications

• Bus-oriented system data routing
• Microprocessor memory addressing
• Digital signal selection circuits

Procurement Notes

Verify the specific manufacturer origin as onsemi or Fairchild Semiconductor due to corporate history. Confirm RoHS compliance status through official datasheets. Check current lifecycle status as distribution availability varies. Ensure the SOIC-16 package matches design requirements.

Selection Notes

Select this component when dual independent 4-to-1 data selection is required in ALS logic environments. Consider the 14 ns propagation delay for timing constraints. Verify compatibility with 5 V logic levels and 3-STATE bus interfacing needs against alternative logic families.

Part Context

This part belongs to the DM74ALS series of logic integrated circuits. It serves as a data selector within the broader category of encoders, decoders, multiplexers, and demultiplexers. The ALS family provides a balance between power consumption and switching speed compared to standard TTL devices.

Replacement Considerations

The 74ACT253SC is a documented functional substitute offering similar dual 4-input multiplexer capabilities with 3-STATE outputs.