SNJ54L42J

Signal Switches, Multiplexers, Decoders Overview

The SNJ54L42J is a military-grade decimal decoder/driver from the TTL/H/L series, manufactured by Texas Instruments and distributed by Rochester Electronics. It features inverted outputs and operates within an extended temperature range of -55 °C to 125 °C. The component utilizes a ceramic glass-sealed CDIP-16 package with 16 terminals. It functions as a single 4-line to 10-line BCD-to-decimal decoder/driver designed for high-reliability applications requiring standard input regulation.

Signal Switches, Multiplexers, Decoders Feature Summary

• Military-grade reliability with extended temperature operation
• Inverted output logic configuration
• Ceramic hermetic packaging for harsh environments

Signal Switches, Multiplexers, Decoders Applications

• Military avionics systems
• Spacecraft telemetry decoding
• High-reliability industrial control interfaces

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify authenticity through authorized distributors like Rochester Electronics, as this part is often sourced from surplus channels. Confirm the specific suffix 'J' denotes the ceramic DIP package. Ensure compliance with RoHS exemptions if required, as leaded components are typical for this heritage series. Request batch traceability documentation for critical aerospace or defense deployments.

Signal Switches, Multiplexers, Decoders Selection Notes

Select the SNJ54L42J when military-grade environmental tolerance is mandatory. It differs from commercial variants by its wider operating temperature range and robust ceramic construction. Choose this over plastic-packaged equivalents if long-term stability in extreme thermal conditions is required. Verify pin compatibility with existing PCB footprints before integration.

Signal Switches, Multiplexers, Decoders Part Context

This component belongs to the legacy SN54xx series of logic devices, originally designed for military specifications. The 'L' indicates Low-power Schottky TTL technology, balancing speed and power consumption. The SNJ54L42J specifically implements a 4-to-10 line decoding function, converting binary coded decimal inputs into one-of-ten active-low outputs.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct replacements include other SN54L42 variants with compatible packages. Cross-reference with SN54LS42 for similar functionality but different electrical characteristics. Verify that substitute parts meet the same military temperature and radiation hardness requirements.