SN74ALS157AN

Overview

The SN74ALS157AN is a quad 1-of-2 data selector/multiplexer from the Texas Instruments ALS logic family. It features four independent multiplexers, each selecting one of two data inputs based on a common select line. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a propagation delay of 14 ns. It is housed in a 16-pin PDIP package and functions within an operating temperature range of 0°C to +70°C.

Feature Summary

• Contains four independent 2-input multiplexers with a common select input for synchronized channel switching.
• Provides true outputs corresponding to the selected data inputs without inversion.
• Utilizes Advanced Low-Power Schottky (ALS) technology to achieve high-speed operation with reduced power consumption.

Applications

• Data routing in digital communication systems
• Address decoding circuits
• Instruction selection in microprocessor-based designs

Procurement Notes

Verify the specific suffix 'AN' confirms the PDIP-14 through-hole package variant rather than surface-mount options. Confirm RoHS compliance status as required by project specifications. Ensure the ordering part number matches the exact manufacturer designation to avoid pinout or electrical characteristic mismatches during integration.

Selection Notes

Select this component when a compact solution for multiple parallel data paths is required. The ALS series offers a balance between speed and power efficiency suitable for general-purpose logic applications. Verify that the 16-pin DIP footprint aligns with the target PCB layout constraints and assembly capabilities.

Part Context

This multiplexer belongs to the standard 74-series logic family, specifically the Advanced Low-Power Schottky sub-family. It serves as a fundamental building block for digital signal processing and control logic, enabling efficient management of multiple data sources within a single integrated circuit package.

Replacement Considerations

Compatible substitutes include the SN74LS157 for standard LS performance levels and the SN74ALS157N for identical functionality in alternative packaging formats. Cross-reference datasheets to ensure pin compatibility and electrical parameter alignment before substitution.