CD4518BPW Equivalent & Substitute Parts

Part Overview

The CD4518BPW is a BCD counter logic integrated circuit manufactured by Texas Instruments, featuring two 4-bit counter elements in a 16-TSSOP surface mount package. This device operates across a wide supply voltage range of 3V to 18V and supports count rates up to 8 MHz with both positive and negative trigger capabilities. The CD4518BPW is currently in Last Time Buy status, making identification of equivalent substitute parts essential for ongoing design support and procurement planning.

Substiute Parts

CD4518BPW

Texas InstrumentsIn Stock: 2749CD4518BPW Datasheet

Current PartRFQ

CD4518BPWR

Texas InstrumentsIn Stock: 16603CD4518BPWR Datasheet

MFR RecommendedRFQ

CD4518BPWE4

Texas InstrumentsIn Stock: 762CD4518BPWE4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD4518BPW are qualified based on strict electrical and mechanical parameter equivalence. All substitute candidates must maintain identical specifications across the following critical parameters:

• Logic Type: BCD Counter with 2 elements, 4 bits per element
• Count Rate: 8 MHz maximum
• Voltage Supply Range: 3V to 18V
• Operating Temperature Range: -55°C to 125°C
• Package Type: 16-TSSOP surface mount
• Reset Type: Asynchronous
• Timing: Synchronous
• Trigger Type: Positive, Negative
• RoHS and REACH Compliance: ROHS3 Compliant, REACH Unaffected

The CD4518BPW has two qualified substitutes that meet all electrical and mechanical requirements. These parts differ only in packaging format (Tube versus Tape & Reel) and product lifecycle status, not in functional performance or pin compatibility.

Parameter Comparison

Engineering Selection Recommendations

CD4518BPWR is the manufacturer-recommended substitute for CD4518BPW. This part maintains full electrical and mechanical equivalence while offering Active product status, ensuring long-term availability and supply chain stability. The primary difference is packaging format: CD4518BPWR is supplied in Tape & Reel format, which is standard for high-volume production environments and automated assembly processes.

CD4518BPWE4 is a parametric equivalent that maintains identical electrical specifications and 16-TSSOP package configuration. However, this part shares Last Time Buy status with the original CD4518BPW, indicating limited future availability. Selection of CD4518BPWE4 should be reserved for applications where Tube packaging is specifically required and supply constraints are acceptable.

For new designs and ongoing production requiring long-term component availability, CD4518BPWR is the preferred selection. For existing designs currently using CD4518BPW in Tube packaging, CD4518BPWE4 provides direct compatibility without assembly process modification.

Frequently Asked Questions (FAQ)

Q: Are CD4518BPWR and CD4518BPWE4 pin-compatible with CD4518BPW?

A: Yes. All three parts use the 16-TSSOP package with identical pinout and electrical characteristics. Pin-for-pin substitution is supported without circuit modification.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging supplies individual components in plastic tubes, suitable for manual assembly or low-volume production. Tape & Reel packaging supplies components on continuous carrier tape in reels, optimized for automated pick-and-place assembly. Electrical performance is identical; packaging format affects only handling and assembly methodology.

Q: Why is CD4518BPW listed as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has announced end-of-life for this specific part number. Existing inventory remains available, but no new production is planned. CD4518BPWR, with Active status, is the recommended long-term alternative.

Q: Can I use CD4518BPWR as a direct replacement in existing assemblies?

A: Yes, provided your assembly process supports Tape & Reel input. If your production line requires Tube packaging, CD4518BPWE4 maintains the original packaging format while offering equivalent electrical performance.

Q: Are all three parts RoHS and REACH compliant?

A: Yes. CD4518BPW, CD4518BPWR, and CD4518BPWE4 are all ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What is the moisture sensitivity level for these parts?

A: All three parts have Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control requirements during storage or handling.