PCA9546AD Equivalent & Substitute Parts

Part Overview

The PCA9546AD is a translating switch interface IC manufactured by Texas Instruments, designed for I2C and SMBus applications. This component operates across a supply voltage range of 2.3V to 5.5V and is housed in a 16-SOIC package. The product is currently classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs requiring this interface functionality.

Substiute Parts

PCA9546AD

Texas InstrumentsIn Stock: 3345PCA9546AD Datasheet

Current PartRFQ

PCA9546AD,118

NXP USA Inc.In Stock: 3112PCA9546AD,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCA9546AD is determined by strict alignment of the following parameters:

• Base Product Number: Both parts must share the PCA9546 base designation
• Interface Protocol: I2C and SMBus compatibility required
• Supply Voltage Range: 2.3V ~ 5.5V operational window must be maintained
• Package Specification: 16-SOIC (0.154", 3.90mm Width) form factor required for PCB compatibility
• Mounting Type: Surface mount technology consistency
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status must be preserved

The PCA9546AD,118 variant manufactured by NXP USA Inc. meets all substitution criteria as an active product alternative.

Parameter Comparison

Engineering Selection Recommendations

The PCA9546AD,118 manufactured by NXP USA Inc. is the qualified substitute for the obsolete PCA9546AD from Texas Instruments. Selection of this alternative is supported by:

• Product Status Alignment: The substitute is classified as active, ensuring continued availability and supply chain stability
• Regulatory Compliance: Both ROHS3 compliance and REACH unaffected status are maintained, meeting environmental and regulatory requirements
• Functional Equivalence: Identical interface protocols (I2C, SMBus), supply voltage specifications (2.3V ~ 5.5V), and package form factor (16-SOIC) ensure direct functional compatibility
• Certification Preservation: ECCN and HTSUS classifications remain unchanged, supporting export and trade compliance

Frequently Asked Questions (FAQ)

Q: Can the PCA9546AD,118 be used as a direct replacement for the PCA9546AD?

A: Yes. Both parts share identical electrical specifications (I2C/SMBus interface, 2.3V ~ 5.5V supply voltage), mechanical packaging (16-SOIC, 0.154" width), and regulatory compliance status. The PCA9546AD,118 is an active product variant suitable for direct substitution.

Q: What is the significance of the ",118" suffix in the part number?

A: The ",118" suffix indicates a packaging variant designation assigned by NXP USA Inc. This designation does not alter the electrical or functional characteristics of the component; it specifies the supplier device package configuration (16-SO).

Q: Are there any compatibility concerns when switching from the Texas Instruments version to the NXP version?

A: No compatibility concerns exist. Both manufacturers' versions conform to identical electrical parameters, interface protocols, and package specifications. The components are electrically and mechanically interchangeable.

Q: Why is the original PCA9546AD classified as obsolete?

A: Product obsolescence is determined by manufacturer discontinuation. The NXP USA Inc. PCA9546AD,118 variant remains in active production, providing continued support for this interface function.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by: base product number (PCA9546), interface protocol (I2C/SMBus), supply voltage range (2.3V ~ 5.5V), package type (16-SOIC, 0.154" width), mounting type (surface mount), and regulatory compliance status (ROHS3, REACH unaffected).