PCA9541AD/03,112 Equivalent & Substitute Parts

Part Overview

The PCA9541AD/03,112 is a 2-Channel I2C Multiplexer Interface manufactured by NXP USA Inc., housed in a 16-SOIC package. This component is classified as Obsolete, indicating discontinued production and limited availability. The part operates across a supply voltage range of 2.3V to 5.5V and is designed for applications requiring I2C and SMBus interface multiplexing. Due to its obsolete status, identifying functionally equivalent substitute components is essential for system redesign, long-term supply chain planning, and production continuity.

Substiute Parts

PCA9541AD/03,112

NXP USA Inc.In Stock: 1167PCA9541AD/03,112 Datasheet

Current PartRFQ

ADP5585ACPZ-01-R7

Analog Devices Inc.In Stock: 3981ADP5585ACPZ-01-R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9541AD/03,112 is determined by the following critical parameters:

Interface Compatibility: The substitute part must support I2C protocol as the primary communication interface, ensuring functional compatibility with existing system architecture.

Voltage Supply Range: The substitute must operate within or encompass the original supply voltage specification of 2.3V to 5.5V. Parts with narrower voltage ranges may require circuit redesign.

Package and Mounting: Surface mount packages are required for direct PCB integration. Package footprint differences necessitate board layout modifications.

Regulatory Compliance: Both RoHS3 and REACH compliance status must be maintained to satisfy manufacturing and environmental standards.

Product Status: Active product status ensures long-term availability and supply chain reliability, contrasting with the obsolete status of the original part.

The identified substitute, ADP5585ACPZ-01-R7, meets the core interface requirement (I2C support) and maintains regulatory compliance. However, voltage supply range and package form factor differences require engineering evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

Regulatory Compliance: Both components maintain ROHS3 and REACH compliance, satisfying environmental and manufacturing standards.

Supply Chain Status: The ADP5585ACPZ-01-R7 carries Active product status with 3960 units in stock, providing immediate availability and long-term supply assurance compared to the Obsolete PCA9541AD/03,112.

Voltage Supply Consideration: The substitute operates at 1.65V to 3.6V, which is narrower than the original 2.3V to 5.5V range. Applications requiring operation above 3.6V or below 1.65V require alternative solutions or circuit modification.

Package and Footprint: The transition from 16-SOIC to 16-WFQFN Exposed Pad, CSP requires PCB layout redesign and updated assembly procedures. The smaller CSP footprint may offer space advantages in compact designs.

Moisture Sensitivity: The substitute has MSL 3 (168 Hours) versus MSL 1 (Unlimited) for the original, requiring stricter moisture control during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can the ADP5585ACPZ-01-R7 directly replace the PCA9541AD/03,112 without circuit modifications?

A: Direct replacement is not possible due to package differences (16-SOIC versus 16-WFQFN CSP) and voltage supply range variance. PCB layout redesign is required. Voltage supply compatibility must be verified for your specific application.

Q: What is the primary reason for substitution?

A: The PCA9541AD/03,112 is Obsolete, making long-term supply unavailable. The ADP5585ACPZ-01-R7 is an Active product with established inventory and supply continuity.

Q: Are both components I2C compatible?

A: Both support I2C protocol. The original also supports SMBus, while the substitute supports I2C only. Verify SMBus requirement in your application.

Q: What are the package footprint implications?

A: The original uses 16-SOIC (0.154", 3.90mm Width). The substitute uses 16-WFQFN Exposed Pad, CSP (3x3), requiring new PCB design files and assembly tooling.

Q: How do voltage supply ranges affect substitution?

A: Original operates 2.3V to 5.5V; substitute operates 1.65V to 3.6V. Applications requiring voltages above 3.6V cannot use the substitute without additional circuit design.

Q: What moisture handling differences exist?

A: Original has MSL 1 (Unlimited storage); substitute has MSL 3 (168 Hours maximum). Stricter moisture control procedures are required for the substitute during storage and assembly.