54AC20/SDA-R

Overview

The 54AC20/SDA-R is a dual 4-input NAND gate integrated circuit manufactured by Rochester Electronics. It belongs to the AC logic series and features true output functionality. The device is housed in a 14-lead Ceramic Flat Pack (CFP) package, specifically identified as MS-001 type with a 0.300-inch body width. It operates within a temperature range of -55 °C to 125 °C and is lead-free compliant.

Feature Summary

• Dual independent 4-input NAND logic gates
• High-speed AC series performance characteristics
• Military-grade ceramic flat pack construction
• Lead-free and RoHS compliant manufacturing

Applications

• Military aerospace digital logic systems
• Spacecraft onboard computer interfaces
• Harsh environment data processing units
• Ruggedized industrial control logic circuits

Procurement Notes

Verify the specific suffix SDA-R against official manufacturer documentation to confirm the exact pinout and electrical specifications for this ceramic variant. Ensure compatibility with existing board layouts designed for 14-lead CFP packages. Confirm that the lead-free status meets current environmental compliance requirements for your assembly process.

Selection Notes

Select this component when high reliability and radiation tolerance are required for 4-input NAND operations. The ceramic package offers superior thermal stability compared to plastic alternatives. Consider the AC series speed-power trade-offs relative to standard TTL or LS logic families for system timing analysis.

Part Context

Rochester Electronics specializes in end-of-life and hard-to-find semiconductors. This part represents a continuation of legacy military-grade logic devices. The 54AC prefix indicates a military qualification level within the AC logic family, ensuring performance under extreme conditions where commercial parts would fail.

Replacement Considerations

Direct substitutes include other 54AC20 variants from qualified manufacturers such as Texas Instruments or Analog Devices, provided they match the 14-CFP package and military temperature ratings. Verify pin-to-pin compatibility before integration.