SN74ALS151DB

Overview

The SN74ALS151DB is an 8-line to 1-line multiplexer in a 16-pin Small-Outline (D) package. It provides full binary decoding to select one of eight data sources based on three address inputs. The device features complementary outputs and includes input clamping diodes. Recommended operating conditions specify a supply voltage range of 4.5 V to 5.5 V. The high-level output voltage is typically 3.2 V at -2.6 mA, while the low-level output voltage is 0.4 V at 12 mA. Propagation delays from address inputs to output range from 4 ns to 24 ns depending on load conditions.

Feature Summary

• Provides full binary decoding to select one of eight data sources
• Includes input clamping diodes to simplify system design
• Features complementary outputs for versatile logic interfacing

Applications

• Boolean function generators
• Parallel-to-serial converters
• Data source selectors

Procurement Notes

Verify the specific ordering suffix against the official Texas Instruments Package Option Addendum to confirm the exact package type and manufacturing status. Ensure the component meets the required RoHS compliance and lead finish specifications for your assembly process. Cross-reference the part marking with the datasheet to validate authenticity and traceability before integration into production.

Selection Notes

Select this component when an 8-channel data selection capability is required within standard TTL logic families. Verify that the operating temperature range of 0°C to 70°C aligns with your environmental constraints. Confirm that the power supply voltage remains within the 4.5 V to 5.5 V limits to ensure proper logic levels and switching characteristics are maintained during operation.

Part Context

This device belongs to the ALS (Advanced Low-power Schottky) logic family, designed for improved speed and power consumption compared to standard LS series devices. The 'D' suffix indicates a plastic Small-Outline package suitable for surface-mount applications. It serves as a digital data selector within broader logic circuit architectures requiring multi-path signal routing.

Replacement Considerations

SN74ALS151DR

FAQ

How does the strobe input affect the outputs?

A high level at the strobe terminal forces the W output high and the Y output low, disabling the selected data input regardless of the address lines.

What is the purpose of the input clamping diodes?

The input clamping diodes simplify system design by handling transient voltages and protecting the inputs from excessive negative or positive excursions beyond the supply rails.