54H21W/C

Overview

The SN54H21W/C is a dual 4-input positive-AND gate manufactured by Rochester Electronics. It belongs to the TTL/H/L series and features two independent logic functions within a single package. The device utilizes a ceramic flatpack (FP) hermetic sealed housing, designated as CDFP14, which contains 14 terminals. This component is characterized for operation over the full military temperature range of -55°C to 125°C. It serves as a high-reliability logic solution suitable for demanding environments requiring robust performance and radiation hardness.

Feature Summary

• Contains two independent 4-input AND gates
• Characterized for -55°C to 125°C military temperature range
• Hermetically sealed ceramic flatpack (CDFP14) package

Applications

• Military aerospace systems
• Spacecraft logic circuits
• Harsh environment industrial control

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and qualification level. Ensure the component meets MIL-PRF-38535 Class V or equivalent space-level requirements if applicable. Confirm that the ceramic flatpack variant matches the design-in footprint and pinout specifications.

Selection Notes

Select this component when dual 4-input AND functionality is required in a hermetic package. The SN54H21W/C is appropriate for designs necessitating operation across the full military temperature spectrum. Consider the physical dimensions of the CDFP14 package during PCB layout to ensure proper clearance and mounting compatibility.

Part Context

Rochester Electronics supplies this component as part of its specialized IC portfolio, often providing alternatives to original equipment manufacturer parts. The SN54H21 series is widely recognized in legacy and high-reliability digital logic applications. This specific W/C variant denotes the ceramic flatpack construction essential for sealed electronic assemblies.

Replacement Considerations

Direct replacements include other SN54H21 variants with compatible packages. Verify pin-to-pin compatibility before substitution. Ensure the alternative component supports the same voltage levels and temperature ranges.