SN54HC21J

Overview

The SN54HC21J is a dual 4-input positive-AND gate manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and supports an operating temperature range of -55°C to 125°C. The device utilizes a 14-pin ceramic dual in-line package (CDIP). It belongs to the HC/UH logic series, featuring CMOS technology for low power consumption and high noise immunity suitable for military and aerospace applications.

Feature Summary

• Dual 4-input positive-AND logic functionality
• Military-grade wide temperature operation capability
• High noise immunity with CMOS construction

Applications

• Military electronic systems
• Aerospace control circuits
• Harsh environment digital logic processing

Procurement Notes

Verify the manufacturer's certification status and traceability documentation carefully. Ensure the component meets specific military qualification standards required for your application. Confirm the package integrity and pin configuration match the design specifications before integration into the final assembly process.

Selection Notes

Select this component when dual 4-input AND logic is required in extreme temperature environments. The ceramic package provides superior durability compared to plastic variants. Consider the HC series speed and power characteristics relative to other logic families available from the manufacturer for optimal system performance.

Part Context

This part belongs to the SN54xx series, designed for high-reliability applications. The HC designation indicates High-speed CMOS technology. The 'J' suffix typically denotes a ceramic dual in-line package. This family is distinct from commercial grade parts due to its extended temperature range and robust packaging.

Replacement Considerations

Check for equivalent parts such as SN54HC21FK or SN54HC21W if package compatibility allows. Verify that substitute components maintain the same logic function, voltage range, and temperature specifications to ensure circuit continuity.