54LS42/BEA

Overview

The 54LS42/BEA is a BCD-to-decimal decoder manufactured by Rochester Electronics. It belongs to the SN54LS42 logic family, designed for military temperature ranges from -55°C to +125°C. The device features four binary-coded decimal inputs and ten active-low outputs. It utilizes LS-TTL technology within a ceramic flatpack package.

Feature Summary

• Provides decoding of four-bit binary coded decimal inputs into ten distinct active-low output lines
• Engineered for reliable operation across the full military extended temperature range
• Constructed using hermetically sealed ceramic flatpack packaging for harsh environment durability

Applications

• Military avionics control systems requiring robust logic decoding
• Industrial automation equipment operating in extreme thermal conditions
• Defense communication hardware utilizing BCD interface standards

Procurement Notes

Verify component authenticity through official manufacturer documentation or authorized distributor channels. Confirm that the ceramic flatpack package matches specific design requirements. Ensure the part meets all necessary military qualification standards before integration into final assemblies.

Selection Notes

Select this component when designing systems necessitating BCD-to-decimal conversion under severe environmental stress. The LS-TTL technology offers standard switching characteristics suitable for general digital logic applications. Verify compatibility with existing power supply voltages and signal levels.

Part Context

Rochester Electronics specializes in extending the lifecycle of obsolete and hard-to-find semiconductors. This component represents their manufacturing capability using original intellectual property or sourced dies. The product ensures continuity for legacy designs requiring specific military-grade logic families.

Replacement Considerations

Direct substitutes include other SN54LS42 variants from different manufacturers. Verify pinout compatibility and electrical specifications before substitution. Ensure replacement parts meet the same military temperature and packaging requirements.