CD4518BCN Equivalent & Substitute Parts

Part Overview

The CD4518BCN is a dual BCD counter IC from onsemi, part of the 4000B logic series. This component functions as a 2-element BCD counter with up-counting capability. The CD4518BCN is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. Obsolete status indicates the manufacturer has discontinued production, requiring engineers to source active alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

CD4518BCN

onsemiIn Stock: 621CD4518BCN Datasheet

Current PartRFQ

CD4518BE

Texas InstrumentsIn Stock: 55179CD4518BE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD4518BCN is determined by the following core parameters:

• Logic Type: Must be BCD Counter to maintain functional equivalence
• Number of Elements: Must be 2 elements to match dual-counter configuration
• Direction: Must support up-counting operation
• Series Compatibility: 4000B series designation indicates CMOS logic family compatibility
• Base Product Number: CD4518 base designation confirms core functional identity

The CD4518BE from Texas Instruments satisfies all substitution criteria. Both parts share the same base product number (CD4518), identical logic type (BCD Counter), matching element count (2), and identical counting direction (Up). The CD4518BE is an active product, ensuring continued availability and supply chain reliability.

Parameter Comparison

Engineering Selection Recommendations

The CD4518BE from Texas Instruments is the qualified substitute for the obsolete CD4518BCN. Selection of the CD4518BE provides the following advantages:

• Active Product Status: Texas Instruments maintains active production and distribution, ensuring long-term supply chain availability
• Regulatory Compliance: The CD4518BE achieves ROHS3 compliance, meeting current environmental and regulatory requirements
• Functional Equivalence: Both parts maintain identical logic type, element count, and counting direction
• Established Specifications: The CD4518BE provides complete electrical specifications including supply voltage range (3 V ~ 18 V), operating temperature range (-55°C ~ 125°C), and count rate (8 MHz)

For designs currently using the CD4518BCN, transition to the CD4518BE ensures continued component availability and compliance with modern regulatory standards.

Frequently Asked Questions (FAQ)

Q: Why is the CD4518BCN considered obsolete? A: The CD4518BCN is classified as obsolete by onsemi, indicating the manufacturer has discontinued production. This status necessitates identification of active alternatives to maintain design support and production continuity.

Q: Is the CD4518BE a direct functional equivalent? A: Yes. The CD4518BE shares the same base product number (CD4518), logic type (BCD Counter), element count (2), and counting direction (Up). Both parts are members of the 4000B CMOS logic series.

Q: What are the key differences between CD4518BCN and CD4518BE? A: The primary differences are manufacturer (onsemi vs. Texas Instruments), product status (obsolete vs. active), and regulatory compliance (RoHS non-compliant vs. ROHS3 compliant). The CD4518BE provides complete electrical specifications, including supply voltage range, operating temperature range, and count rate.

Q: Are there package compatibility considerations? A: The CD4518BE is specified as 16-DIP (0.300", 7.62mm) through-hole package. Verify that your PCB design accommodates this package configuration before implementation.

Q: Can the CD4518BE be used in new designs? A: Yes. The CD4518BE is an active product with ROHS3 compliance, making it suitable for new designs requiring BCD counter functionality within the 4000B logic series.

Q: What supply voltage range does the CD4518BE support? A: The CD4518BE operates across a supply voltage range of 3 V to 18 V, providing flexibility for various circuit configurations.