PCA9541APW/03,112 Equivalent & Substitute Parts

Part Overview

The PCA9541APW/03,112 is a 2-Channel I2C Multiplexer Interface manufactured by NXP USA Inc., designed for I2C and SMBus applications requiring channel selection and signal routing. This component operates across a supply voltage range of 2.3V to 5.5V and is housed in a 16-TSSOP surface mount package.

The product status is listed as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing system design, maintenance, and production planning. Obsolete components require substitution strategies to ensure supply chain continuity and system reliability.

Substiute Parts

PCA9541APW/03,112

NXP USA Inc.In Stock: 794PCA9541APW/03,112 Datasheet

Current PartRFQ

AD9985ABSTZ-110

Analog Devices Inc.In Stock: 20598AD9985ABSTZ-110 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the PCA9541APW/03,112 is constrained by the following critical parameters:

Interface Compatibility: The primary function is I2C/SMBus multiplexing. Substitute components must support these protocols.

Voltage Supply Range: Operating voltage must overlap or encompass the 2.3V to 5.5V specification to ensure compatibility with existing power distribution systems.

Package and Mounting: Surface mount technology and physical package dimensions affect PCB layout and assembly processes. Package compatibility is essential for direct board-level substitution.

Compliance and Certifications: RoHS3 compliance and REACH status must be maintained to satisfy regulatory and procurement requirements.

The provided substitute part AD9985ABSTZ-110 represents a different functional category (Video Interface) with incompatible interface protocols (Serial vs. I2C/SMBus) and package specifications (80-LQFP vs. 16-TSSOP). This part does not qualify as a functional equivalent for the PCA9541APW/03,112 based on the stated substitution criteria.

Parameter Comparison

Engineering Selection Recommendations

Based on the provided data, the AD9985ABSTZ-110 is not a suitable substitute for the PCA9541APW/03,112. The critical incompatibilities are:

Interface Protocol Mismatch: The PCA9541APW/03,112 implements I2C/SMBus multiplexing, while the AD9985ABSTZ-110 is a video interface component with serial protocol support. These serve fundamentally different applications and cannot be interchanged.

Package Incompatibility: The 16-TSSOP package of the main part differs substantially from the 80-LQFP package of the listed substitute, preventing direct board-level replacement without significant PCB redesign.

Voltage Supply Constraints: Although both components operate at low voltages, the AD9985ABSTZ-110 has a narrower supply range (2.2V to 3.45V) compared to the PCA9541APW/03,112 (2.3V to 5.5V), limiting flexibility in mixed-voltage system designs.

Product Status: Both components are discontinued or in last-time-buy status, indicating that alternative sourcing strategies beyond simple part substitution are required.

For applications requiring I2C multiplexing functionality, alternative components from active product lines should be evaluated based on matching interface protocols, compatible package specifications, and overlapping voltage supply ranges.

Frequently Asked Questions (FAQ)

Q: Can the AD9985ABSTZ-110 replace the PCA9541APW/03,112 in an existing design?

A: No. The AD9985ABSTZ-110 is a video interface component with serial protocol support, not an I2C multiplexer. Direct substitution is not possible due to incompatible interface protocols and package specifications.

Q: What are the critical parameters for finding a true substitute for the PCA9541APW/03,112?

A: A functional equivalent must support I2C and SMBus protocols, operate within or encompass the 2.3V to 5.5V supply range, use a compatible surface mount package suitable for the existing PCB layout, and maintain RoHS3 compliance and REACH compliance status.

Q: Why is the package specification important for substitution?

A: Package type (16-TSSOP vs. 80-LQFP) determines physical dimensions, pin pitch, and PCB footprint requirements. Incompatible packages require PCB redesign, assembly process changes, and re-qualification, making them unsuitable for direct substitution.

Q: What does "Obsolete" product status mean for procurement?

A: Obsolete status indicates the component is no longer manufactured and existing inventory is limited. Procurement must prioritize securing remaining stock or identifying active-production alternatives to ensure long-term supply chain viability.

Q: How do voltage supply ranges affect substitution decisions?

A: The supply voltage range determines compatibility with system power distribution. A substitute must operate safely across the voltage levels present in the target application. Narrower ranges may limit system flexibility or require additional voltage regulation.