SN74AS151N

Overview

The SN74AS151N is an Advanced Schottky TTL 8-line-to-1-line data selector/multiplexer manufactured by Texas Instruments. It features eight digital inputs, three binary select lines, and complementary outputs (one true, one inverted). The device operates within a supply voltage range of 4.5 V to 5.5 V. It utilizes the AS logic series for high-speed performance with low power dissipation relative to standard TTL. The component is housed in a 16-pin plastic dual-in-line package (PDIP) suitable for through-hole mounting.

Feature Summary

• Provides multiplexing functionality by selecting one of eight input channels based on binary address signals.
• Delivers both true and inverted output signals simultaneously for flexible logic interfacing.
• Utilizes Advanced Schottky technology to achieve fast propagation delays while maintaining moderate power consumption.

Applications

• Data routing in digital communication systems
• Address decoding in memory architectures
• Waveform generation circuits

Procurement Notes

Verify the specific manufacturer source, as Rochester Electronics may distribute surplus or obsolescence inventory for this part number alongside Texas Instruments. Confirm that the physical package matches the required 16-pin DIP footprint for your PCB design. Ensure the logic family compatibility aligns with your system's voltage levels and speed requirements before finalizing procurement.

Selection Notes

Select this component when high-speed switching is required for 8-channel data selection without excessive power draw. Compare against LS or HC families if lower cost or different voltage tolerances are acceptable. Verify that the 3-state capability is not needed, as this variant provides fixed outputs rather than tri-stated lines.

Part Context

This part belongs to the SN74AS series, which represents the high-performance tier of the 7400 logic family. It succeeds earlier S-series devices by offering improved speed-to-power ratios. The SN74AS151 specifically addresses applications requiring rapid selection among multiple data sources in synchronous digital designs.

Replacement Considerations

The SN74ALS151 serves as a direct logical substitute with similar pinout but slower speed and lower power. The SN74LS151 offers further cost reduction with significantly reduced performance. Verify electrical characteristics match application needs when substituting.