SN74ALS253DR

Overview

The SN74ALS253DR is a dual 1-of-4 data selector/multiplexer with 3-state outputs from the Texas Instruments ALS logic family. It operates within a supply voltage range of 4.5 V to 5.5 V and features a propagation delay of 12 ns. The device provides a low-level output current of 24 mA and a high-level output current of -800 uA. It is housed in a 16-pin SOIC package and functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Dual 1-of-4 data selection capability
• Three-state output control
• Low power consumption relative to standard TTL

Applications

• Data routing in digital systems
• Address decoding applications
• Signal multiplexing circuits

Procurement Notes

Verify the specific suffix 'DR' indicates the tape-and-reel packaging format when ordering. Confirm that the ALS series compatibility meets system requirements, as this component belongs to a legacy logic family. Ensure the SOIC-16 footprint matches the PCB design constraints before finalizing procurement specifications.

Selection Notes

Select this component for designs requiring dual 4-to-1 multiplexing with tri-state outputs. The ALS series offers improved speed and lower power compared to older standards. Verify that the 5V supply voltage aligns with the target system architecture and that the 12 ns propagation delay satisfies timing constraints.

Part Context

This part belongs to the SN74ALS253 series, which are dual 1-of-4 data selectors. The 'DWR' or 'DR' suffix typically denotes the SOIC package and reel packaging. These components are part of the Advanced Low-power Schottky (ALS) logic family, designed for performance efficiency.

Replacement Considerations

Compatible substitutes include other SN74ALS253 variants such as SN74ALS253N or SN74ALS253NSR, provided the package type and electrical characteristics remain consistent with the original design requirements.