SN74AS151D

Overview

The SN74AS151D is an Advanced Schottky TTL 8-line-to-1-line data selector or multiplexer manufactured by Texas Instruments. It features eight digital data inputs, three binary select lines, and complementary outputs. The device includes a strobe input for enabling or disabling the selected output. Packaged in a 16-pin SOIC (D) format, it operates within a standard 5V logic supply range typical of the AS series, providing high-speed switching capabilities suitable for complex digital logic applications requiring rapid data routing.

Feature Summary

• Provides eight selectable digital data inputs routed to a single output path via three address lines
• Features complementary outputs delivering both true and inverted signals simultaneously
• Includes a dedicated strobe input terminal to enable or disable the multiplexing function

Applications

• Data routing in digital communication systems
• Address decoding circuits
• Implementation of combinational logic functions

Procurement Notes

Verify the specific suffix 'D' corresponds to the SOIC package variant when sourcing. Confirm that the component meets the required Advanced Schottky speed specifications for your design. Ensure compatibility with existing 5V logic levels. Check for RoHS compliance status if environmental regulations apply to your manufacturing process. Validate pinout alignment with your PCB footprint.

Selection Notes

Select this component when high-speed multiplexing is required compared to standard TTL alternatives. Consider the AS series performance characteristics against other logic families like ALS or HC. Evaluate the trade-off between power consumption and switching speed inherent to Schottky technology. Ensure the 16-pin surface mount package fits your assembly constraints.

Part Context

This part belongs to the Texas Instruments SN74AS family, known for high-speed operation using Advanced Schottky technology. It serves as a functional equivalent to earlier 74S151 devices but offers improved performance metrics. The SN74AS151D specifically denotes the dual-in-line small-outline package version, distinguishing it from plastic DIP or ceramic variants within the same logical family.

Replacement Considerations

The SN74S151 is a direct functional predecessor in the S series. Other manufacturers may offer compatible 8-to-1 multiplexers under different part numbers. Verify electrical parameters such as propagation delay and supply current before substituting with generic equivalents.