CD4520BCN Equivalent & Substitute Parts

Part Overview

The CD4520BCN is a dual binary counter IC from onsemi's 4000B logic series, designed for counting applications requiring two independent 4-bit binary counter elements. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production, maintenance, and new designs requiring this functionality.

The CD4520BCN provides up-counting capability with asynchronous reset and synchronous timing characteristics. Due to its obsolete status and limited current availability through primary channels, identifying compatible substitute parts ensures design continuity and supply chain reliability.

Substiute Parts

CD4520BCN

onsemiIn Stock: 1219CD4520BCN Datasheet

Current PartRFQ

CD4520BE

Harris CorporationIn Stock: 18467CD4520BE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD4520BCN is determined by the following critical parameters:

• Logic Type: Binary Counter functionality
• Series Compatibility: 4000B CMOS logic family
• Number of Elements: Dual (2) independent counter elements
• Direction: Up-counting operation
• Base Product Number: CD4520 (common base designation)

The CD4520BE from Harris Corporation qualifies as a direct substitute based on matching these core functional parameters. Both parts share the same base product number (CD4520) and provide identical counter element configuration and counting direction within the 4000B logic series.

Parameter Comparison

Engineering Selection Recommendations

The CD4520BE from Harris Corporation is the direct substitute for the CD4520BCN. Both parts are obsolete and RoHS non-compliant, reflecting their legacy status within the 4000B CMOS logic family.

Selection between these parts should be based on:

• Availability: Current inventory levels and supplier lead times
• Compliance Requirements: Both parts carry identical RoHS non-compliant and REACH Unaffected designations; designs requiring RoHS compliance cannot use either part
• Export Classification: Both parts are classified as EAR99, with identical HTSUS codes (8542.39.0001)
• Packaging Compatibility: The CD4520BE is specified in 16-DIP (0.300", 7.62mm) through-hole packaging; verify PCB footprint compatibility with original design

Frequently Asked Questions (FAQ)

Q: Can the CD4520BE directly replace the CD4520BCN in existing designs?

A: Yes. Both parts share the same base product number (CD4520), belong to the 4000B logic series, and provide dual binary counter functionality with up-counting operation. Verify that your PCB footprint accommodates the 16-DIP package format.

Q: What is the significance of the obsolete product status for both parts?

A: Obsolete status indicates these parts are no longer manufactured by their original suppliers. Existing inventory from authorized distributors represents the available supply. Long-term design strategies should evaluate modern counter IC alternatives if production volumes or project timelines extend beyond current stock availability.

Q: Are there RoHS-compliant alternatives to the CD4520BCN?

A: The provided substitute list contains only the CD4520BE, which is also RoHS non-compliant. If RoHS compliance is required, alternative binary counter ICs from current product lines must be evaluated outside this substitution scope.

Q: What packaging considerations apply when substituting the CD4520BE?

A: The CD4520BE uses 16-DIP (0.300", 7.62mm) through-hole packaging. Confirm that your PCB design includes compatible DIP-16 footprints and that your assembly process supports through-hole soldering. Surface-mount alternatives would require different part numbers outside this substitution group.

Q: How do the electrical specifications compare between these parts?

A: The CD4520BE specifies 3 V to 18 V supply voltage range, 8 MHz count rate, -55°C to 125°C operating temperature, and supports both positive and negative trigger types. The CD4520BCN does not provide detailed electrical specifications in available documentation. Designs using the CD4520BCN should verify compatibility with the CD4520BE's specified operating parameters.