SN74ALS157ADB

Overview

The SN74ALS157ADB is a quad 1-of-2 data selector/multiplexer from the Texas Instruments ALS logic series. 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 surface-mount installation in a 16-pin SOIC package. It functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrates four independent 2-to-1 multiplexers with a common select input for efficient data routing
• Provides true outputs corresponding to the selected data inputs without inversion
• Utilizes Advanced Low-power Schottky (ALS) technology for optimized speed and power consumption

Applications

• Data routing in digital signal processing systems
• Address decoding and selection in microprocessor-based designs
• Input selection for analog-to-digital converter channels

Procurement Notes

Verify the specific suffix 'DB' against official Texas Instruments documentation to confirm the exact package variant and tape-and-reel specifications. Ensure compatibility with standard SOIC footprints during PCB layout. Confirm RoHS compliance status through current manufacturer datasheets before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring multiple independent data paths controlled by a single select signal. The ALS series offers a balance of propagation delay and power dissipation suitable for general-purpose logic applications. Verify that the required output drive current meets the load requirements of the downstream circuitry.

Part Context

This part belongs to the SN74ALS157 family of multiplexers. It serves as a functional equivalent to other industry-standard quad multiplexers but utilizes Texas Instruments' specific ALS process. The device is designed for integration into larger digital logic systems requiring reliable data switching capabilities.

Replacement Considerations

Check for SN74ALS157AN or SN74ALS157NSR if different packaging is required. Verify pinout compatibility with alternative manufacturers such as ON Semiconductor or Fairchild before substitution.