4520BDMQB

Overview

The National Semiconductor 4520BDMQB is a binary counter integrated circuit housed in a 14-CERDIP package. It functions as a single-element, 4-bit up-counter with a maximum count rate of 10 MHz. The device supports both positive and negative logic configurations for flexible system integration.

Feature Summary

• Provides synchronous 4-bit binary counting capability
• Supports through-hole mounting via ceramic dual in-line package
• Capable of operating at frequencies up to 10 MHz

Applications

• Digital frequency division circuits
• Binary sequence generation systems
• Timing control logic modules

Procurement Notes

Verify the specific datasheet version for electrical characteristics, as legacy components may have multiple revisions. Confirm RoHS compliance status, as some sources indicate non-compliance for this part number. Ensure the 14-CDIP package dimensions match your PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component when a robust, high-speed binary counter is required for through-hole applications. Consider the 10 MHz limit for clock speed requirements. Evaluate the ceramic package durability against plastic alternatives if environmental resistance is critical for the target deployment scenario.

Part Context

This component belongs to the 4520 series of binary counters manufactured by National Semiconductor. It serves as a fundamental building block for digital logic designs requiring precise binary counting operations without external decoding components.

Replacement Considerations

Check for direct pin-compatible substitutes within the same logic family. Verify that any alternative maintains the 10 MHz count rate and 4-bit architecture to ensure functional equivalence in existing designs.