SNJ54ALS258AJ

Signal Switches, Multiplexers, Decoders Overview

The SNJ54ALS258AJ is a military-grade quadruple 2-input data selector/multiplexer manufactured by Texas Instruments. It features four independent channels, each capable of selecting one of two data inputs (A or B) based on the logic level of the A/B select line. The device provides three-state outputs controlled by an output-enable (OE) input; when OE is high, outputs are in a high-impedance state. It operates within a supply voltage range of 4.5 V to 5.5 V and is characterized for temperatures from -55 °C to 125 °C. The component utilizes a 16-pin ceramic dual in-line package (CDIP).

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides bus interface capabilities from multiple sources in high-performance systems.
• Features three-state outputs that do not load data lines when the output-enable input is at a high logic level.
• Designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized architectures.

Signal Switches, Multiplexers, Decoders Applications

• Multiplexing signals from 4-bit data sources to 4-output data lines in bus-organized systems.
• Providing bus interface functionality from multiple sources in high-performance computing environments.
• Military and defense applications requiring operation across the full military temperature range.

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix 'AJ' corresponds to the 16-pin Ceramic Dual In-Line Package (CDIP) with QML certification. Confirm the part marking matches the manufacturer's standard for this variant. Ensure the procurement channel supports military-grade components and validates the RoHS status, which is typically non-compliant for this series. Cross-reference the datasheet revision date against the manufacturing lot traceability requirements.

Signal Switches, Multiplexers, Decoders Selection Notes

Select the SNJ54ALS258AJ over commercial variants when operation within the -55 °C to 125 °C temperature range is mandatory. Choose this specific model for applications requiring the ceramic package construction for enhanced environmental durability. Verify that the ALS logic family characteristics align with the system's power and speed requirements compared to AS or standard LS alternatives.

Signal Switches, Multiplexers, Decoders Part Context

This component belongs to the SN54ALS25XA series of data selectors and multiplexers. It shares functional similarities with the SN54ALS257A but differs in output polarity. Both devices are designed for bus-organized systems and feature three-state outputs. The SN54ALS258AJ is specifically qualified for military and defense applications, distinguishing it from the commercial SN74ALS258A counterpart.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SNJ54ALS257AJ serves as a direct functional substitute if inverted output polarity is acceptable. Commercial equivalents include SN74ALS258AN for non-military temperature ranges. Verify pinout compatibility and electrical characteristics before substituting with other ALS series multiplexers.

Signal Switches, Multiplexers, Decoders FAQ

How does the output-enable input affect the three-state outputs?

When the output-enable (OE) input is at a high logic level, the outputs enter a high-impedance state, effectively disconnecting them from the data lines to prevent loading.

What determines which data input is selected?

The selection between the A and B data inputs is determined by the logic level of the A/B select line. A low level selects input A, while a high level selects input B.