PCA9518PW Equivalent & Substitute Parts

Part Overview

The PCA9518PW is a specialized interface buffer IC manufactured by Texas Instruments, designed for I2C bus applications. This 20-TSSOP surface mount device operates within a 3V to 3.6V supply voltage range and is classified as a Last Time Buy product. Due to its discontinued status, identifying compatible substitute parts is essential for ongoing design support and production continuity. The PCA9518PWR serves as the primary manufacturer-recommended alternative, offering identical functional specifications with improved availability.

Substiute Parts

PCA9518PW

Texas InstrumentsIn Stock: 3670PCA9518PW Datasheet

Current PartRFQ

PCA9518PWR

Texas InstrumentsIn Stock: 6115PCA9518PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between PCA9518PW and PCA9518PWR is valid based on the following criteria:

Identical Parameters:

• Base product number (PCA9518)
• Functional classification (Buffer Interface)
• Package specification (20-TSSOP, 0.173" width, 4.40mm)
• Voltage supply range (3V ~ 3.6V)
• Interface protocol (I2C)
• Mounting type (Surface Mount)
• RoHS3 compliance
• Moisture sensitivity level (MSL 1)
• REACH and ECCN classifications

Differentiating Factor: The primary distinction between these parts is packaging format: PCA9518PW is supplied in Tube packaging, while PCA9518PWR is supplied in Tape & Reel (TR) format. This difference affects inventory management and automated assembly processes but does not impact electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The PCA9518PWR is the manufacturer-recommended substitute for the PCA9518PW. Selection between these parts should be based on the following factors:

For PCA9518PW (Tube Packaging): Use only when existing inventory must be depleted or when tube packaging is specifically required for manual assembly or low-volume production runs. This part carries Last Time Buy status, indicating limited future availability.

For PCA9518PWR (Tape & Reel Packaging): Select for new designs, production continuity, and automated assembly processes. This part maintains Active product status with higher inventory availability (6100 Pcs vs. 3600 Pcs). The Tape & Reel format is optimized for pick-and-place equipment and high-volume manufacturing.

Both parts meet identical electrical, mechanical, and compliance requirements. The choice between them is driven by supply chain strategy and manufacturing process requirements rather than technical performance.

Frequently Asked Questions (FAQ)

Q: Can PCA9518PWR be used as a direct replacement for PCA9518PW in existing designs?

A: Yes. Both parts share identical electrical specifications, pin configurations, and package dimensions. The only difference is the packaging format (Tube vs. Tape & Reel), which does not affect circuit performance or PCB assembly compatibility.

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

A: Tube packaging is used for manual handling and low-volume applications, while Tape & Reel packaging is designed for automated pick-and-place assembly equipment. Both formats contain the same component with identical specifications.

Q: Why is PCA9518PW marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued this product line. Existing inventory will be sold until depletion, after which the part will no longer be available. The PCA9518PWR (Tape & Reel variant) remains in Active status and should be used for future designs.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity levels (MSL 1). They meet the same regulatory and environmental standards.

Q: Can I mix PCA9518PW and PCA9518PWR in the same production batch?

A: Yes, from an electrical and functional standpoint. However, mixing packaging formats may complicate inventory management and assembly processes. It is recommended to standardize on one format per production run.

Q: Does the PCA9518PWR support additional interfaces compared to PCA9518PW?

A: The PCA9518PWR specification lists both I2C and SMBus support, while PCA9518PW lists I2C only. However, both parts are based on the same base product number (PCA9518) and share identical hardware. The SMBus notation for PCA9518PWR reflects broader protocol compatibility within the same device.