CD4008AD/3

Specialty Logic Overview

The CD4008AD/3 is a CMOS logic integrated circuit belonging to the 4000 series, manufactured by Harris Corporation. It functions as a 4-bit binary adder/subtractor housed in a 16-pin ceramic dual in-line package (CDIP16). The device operates within a supply voltage range of 3 V to 12 V, with a nominal rating of 5 V. It supports an operating temperature range from -55 °C to 125 °C and features a propagation delay of 1300 ns at nominal supply.

Specialty Logic Feature Summary

• Performs parallel addition or subtraction of two 4-bit binary numbers
• Configurable for cascading operations via dedicated carry input and output pins
• Utilizes hermetically sealed ceramic packaging for environmental stability

Specialty Logic Applications

• Digital arithmetic processing units
• Address calculation circuits
• Data conversion systems

Specialty Logic Procurement Notes

Verify that the specific suffix /3 corresponds to the intended manufacturing lot or revision level, as Harris part numbering can vary. Confirm compliance with RoHS directives if required, as older Harris CMOS parts are often non-compliant. Ensure the ceramic DIP-16 package matches the target PCB footprint and thermal requirements.

Specialty Logic Selection Notes

Select this component when a reliable, high-temperature tolerant binary adder is needed for legacy or industrial systems. The CD4008 provides a complete 4-bit solution with carry handling, eliminating the need for multiple discrete gates. Consider the 1300 ns propagation delay against system clock speeds to ensure timing margins are met.

Specialty Logic Part Context

This component is part of the extensive 4000 series CMOS logic family, known for wide voltage operation and low power consumption. Harris Corporation was a primary producer of these standard logic ICs before industry consolidation. The CD4008 specifically addresses the fundamental requirement for binary arithmetic in digital logic design.

Specialty Logic Replacement Considerations

Equivalent functional replacements include the CD4008A or CD4008B from other manufacturers. Verify pin compatibility and electrical characteristics such as propagation delay and current drive capabilities before substitution.