PCA9546AD,112 Equivalent & Substitute Parts

Part Overview

The PCA9546AD,112 is a translating switch interface IC manufactured by NXP USA Inc., 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 part is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

PCA9546AD,112

NXP USA Inc.In Stock: 820PCA9546AD,112 Datasheet

Current PartRFQ

PCA9546AD

Texas InstrumentsIn Stock: 3345PCA9546AD Datasheet

DirectRFQ

ADP5585ACPZ-03-R7

Analog Devices Inc.In Stock: 2055ADP5585ACPZ-03-R7 Datasheet

MFR RecommendedRFQ

CA91L862A-50IE

Renesas Electronics CorporationIn Stock: 1998CA91L862A-50IE Datasheet

MFR RecommendedRFQ

NCT5948W

Nuvoton Technology CorporationIn Stock: 1047NCT5948W Datasheet

MFR RecommendedRFQ

PCA9546ADR

Texas InstrumentsIn Stock: 3221PCA9546ADR Datasheet

MFR RecommendedRFQ

PCA9546ADT

Texas InstrumentsIn Stock: 1189PCA9546ADT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9546AD,112 is determined by the following critical parameters:

• Interface Protocol: I2C and/or SMBus compatibility
• Supply Voltage Range: Minimum 2.3V to 5.5V operation
• Package Type: 16-pin SOIC or equivalent footprint
• Application Function: Translating switch capability
• RoHS Compliance: ROHS3 Compliant status
• Product Status: Active or Obsolete designation

Substitute parts are grouped into two categories: direct equivalents maintaining identical electrical and mechanical specifications, and functional alternatives with modified package or voltage specifications that serve the same application role.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Recommended for Pin-Compatible Replacement)

PCA9546ADR (Texas Instruments) is the primary substitute for the PCA9546AD,112. This part maintains identical electrical specifications (2.3V to 5.5V supply, I2C/SMBus interface) and mechanical compatibility (16-SOIC package). The PCA9546ADR holds Active product status, ensuring continued availability and manufacturing support. Both parts are ROHS3 Compliant with MSL rating of 1 (Unlimited), providing equivalent environmental performance.

PCA9546ADT (Texas Instruments) provides an alternative packaging option (Tape & Reel) with identical electrical and mechanical specifications. This part is classified as Obsolete but maintains full parameter compatibility with the original component.

Functional Alternatives (Modified Specifications)

ADP5585ACPZ-03-R7 (Analog Devices Inc.) serves I2C applications with reduced supply voltage range (1.65V to 3.6V) and alternative package format (16-WFQFN Exposed Pad, CSP). This part is Active and ROHS3 Compliant but requires PCB layout redesign due to package differences.

NCT5948W (Nuvoton Technology Corporation) is specified as an I2C interface component with Active product status and ROHS3 Compliance. Limited parameter documentation restricts detailed compatibility assessment.

CA91L862A-50IE (Renesas Electronics Corporation) is not recommended as a substitute. This part operates at fixed 3.3V supply voltage, uses a 256-PBGA package incompatible with the original footprint, and is RoHS non-compliant.

Frequently Asked Questions (FAQ)

Q: Can PCA9546ADR directly replace PCA9546AD,112 without PCB modifications?

A: Yes. PCA9546ADR maintains identical pin configuration, package dimensions (16-SOIC), and electrical specifications (2.3V to 5.5V supply, I2C/SMBus interface). No PCB layout changes are required.

Q: What is the difference between PCA9546ADR and PCA9546ADT?

A: Both parts are electrically identical. The primary difference is packaging format: PCA9546ADR is supplied in Cut Tape (CT) & Digi-Reel format, while PCA9546ADT is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements.

Q: Why is ADP5585ACPZ-03-R7 listed as a substitute if the package is different?

A: ADP5585ACPZ-03-R7 provides functional I2C interface capability for applications where package redesign is acceptable. The reduced supply voltage range (1.65V to 3.6V) and alternative package format (16-WFQFN) require design validation before implementation.

Q: Is CA91L862A-50IE suitable for this application?

A: No. CA91L862A-50IE operates at fixed 3.3V supply voltage, uses a 256-PBGA package, and is RoHS non-compliant. This part does not meet the electrical or mechanical requirements of the original specification.

Q: What does MSL rating 1 (Unlimited) mean for component handling?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. The part can be stored indefinitely without desiccant packaging or time-limited shelf life constraints, simplifying inventory management.

Q: Are all recommended substitutes ROHS3 Compliant?

A: PCA9546ADR, PCA9546ADT, ADP5585ACPZ-03-R7, and NCT5948W are ROHS3 Compliant. CA91L862A-50IE is RoHS non-compliant and does not meet current environmental regulations.