54LS147/BEA

Overview

The SN54LS147BEA is a high-speed low-power Schottky TTL priority encoder manufactured by Rochester Electronics. It encodes ten decimal data lines into four-line binary-coded decimal (BCD) outputs. The device features active-low inputs and outputs, with an implied zero condition that requires no specific input state to encode the decimal zero value. It operates within a military temperature range of -55°C to 125°C and utilizes a ceramic dual in-line package.

Feature Summary

• Encodes ten decimal inputs into four-bit BCD output
• Active-low logic for both inputs and outputs
• Implied zero encoding without external circuitry
• Military-grade temperature range operation

Applications

• Decimal-to-BCD conversion in digital systems
• Priority encoding in military avionics
• Data handling in space-level electronics
• Industrial control system interfaces

Procurement Notes

Verify component authenticity through official manufacturer documentation or authorized distributor channels. Confirm lot traceability and quality assurance standards such as MIL-PRF-38535 compliance. Ensure the part matches the specified ceramic package and pinout configuration. Request test reports to validate performance against original datasheet specifications before integration.

Selection Notes

Select this component when military-grade reliability and wide temperature tolerance are required. It is suitable for applications needing direct decimal input encoding without additional decoding logic. Consider the ceramic package for harsh environments requiring superior thermal and mechanical stability compared to plastic alternatives.

Part Context

This part belongs to the SN54LS147 family of priority encoders. It is designed for use in systems requiring robust performance under extreme conditions. The device is commonly found in aerospace, defense, and industrial applications where long-term reliability and precise data encoding are critical requirements.

Replacement Considerations

Compatible substitutes include other SN54LS147 variants from qualified manufacturers. Verify pin compatibility and electrical characteristics before substitution. Ensure replacement parts meet the same military temperature and quality standards.