SN74ALS257ANSR

Overview

The SN74ALS257ANSR is a quadruple 2-line to 1-line data selector/multiplexer manufactured by Texas Instruments. It features three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device supports an operating temperature range from 0°C to 70°C. It is housed in a 16-pin Small Outline (SO) package designed for surface-mount technology.

Feature Summary

• Provides four independent multiplexing channels for signal selection
• Outputs are capable of driving bus lines via three-state configuration
• Constructed using Advanced Low-Power Schottky logic for high-speed performance

Applications

• Data routing in digital communication systems
• Signal selection in microprocessor-based control circuits
• Address decoding and data switching applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type, tape-and-reel specifications, and environmental compliance status such as RoHS designation. Ensure the component matches the required industrial temperature grade and pinout compatibility before integration into the final design.

Selection Notes

Select this component when multiple data sources require selection onto a common bus line with minimal loading effects. The ALS series offers a balance of speed and power consumption suitable for general-purpose logic applications. Confirm that the system voltage aligns with the specified 4.5 V to 5.5 V operational range.

Part Context

This part belongs to the SN74ALS family of logic integrated circuits, which utilizes Advanced Low-Power Schottky technology. The family includes various combinational logic devices such as multiplexers, decoders, and gates. The SN74ALS257 specifically addresses multi-channel data selection needs within standard TTL-compatible logic systems.

Replacement Considerations

Publicly confirmed substitute part numbers include SN74ALS257ANSRE4 and SN74ALS257ANSRG4.