JM54AC521SRA-RH

Comparators Overview

The JM54AC521SRA-RH is an 8-bit identity comparator manufactured by National Semiconductor, now part of Microchip Technology. It features active low outputs that indicate equality between two 8-bit binary words. The device operates within a temperature range of -55°C to 125°C and is housed in a 20-CDIP package with through-hole mounting. This component belongs to the uPACE-level logic family, designed for high-reliability applications requiring precise digital comparison functions.

Comparators Feature Summary

• Provides active low output signals when two 8-bit input words are identical
• Operates reliably across extended industrial and military temperature ranges
• Utilizes uPACE-level logic technology for enhanced performance stability

Comparators Applications

• Digital data validation systems
• Memory address matching circuits
• Industrial control logic verification

Comparators Procurement Notes

Verify manufacturer documentation confirms the specific suffix RHA or SRA indicates ceramic DIP packaging and military-grade qualification. Confirm National Semiconductor origin prior to acquisition as Microchip acquired the brand. Ensure compatibility with existing through-hole assembly processes given the CDIP form factor.

Comparators Selection Notes

Select this component when strict 8-bit equality checking is required in harsh environments. The wide operating temperature range supports aerospace and defense use cases. Verify pinout compatibility with legacy designs if replacing older 54AC series parts. Consider the through-hole requirement against available PCB real estate.

Comparators Part Context

This part falls under the 54AC series of high-speed CMOS logic devices originally developed by National Semiconductor. The 54-series designation typically denotes military-grade specifications, including extended temperature ranges and stricter manufacturing controls compared to commercial 74AC equivalents. The AC prefix indicates advanced CMOS technology offering improved speed and power characteristics.

Comparators Replacement Considerations

Direct substitutes include other 54AC521 variants from qualified manufacturers such as Texas Instruments or Microchip. Verify equivalent package dimensions and electrical characteristics before substitution. Cross-reference datasheets to ensure compatible voltage levels and output drive capabilities.