PCA9546APWT Equivalent & Substitute Parts

Part Overview

The PCA9546APWT is a translating switch interface IC manufactured by Texas Instruments, designed for I2C and SMBus applications. This 16-TSSOP surface mount device operates across a supply voltage range of 2.3V to 5.5V and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute components is essential for ongoing system design, maintenance, and production continuity.

Substiute Parts

PCA9546APWT

Texas InstrumentsIn Stock: 4427PCA9546APWT Datasheet

Current PartRFQ

ADN8102ACPZ-R7

Analog Devices Inc.In Stock: 1236ADN8102ACPZ-R7 Datasheet

MFR RecommendedRFQ

ADP5585ACBZ-02-R7

Analog Devices Inc.In Stock: 2131ADP5585ACBZ-02-R7 Datasheet

MFR RecommendedRFQ

PCA9546APW,118

NXP SemiconductorsIn Stock: 24142PCA9546APW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCA9546APWT are identified based on the following critical parameters:

Primary Substitution Criteria:

• Interface protocol compatibility (I2C and/or SMBus support)
• Voltage supply range overlap or compatibility
• Surface mount packaging capability
• RoHS3 compliance status
• Moisture sensitivity level (MSL) rating

Substitute Classification:

Direct Functional Equivalent (Highest Compatibility):

• PCA9546APW,118 (NXP Semiconductors): Identical interface protocols (I2C, SMBus), matching voltage range (2.3V ~ 5.5V), same package type (16-TSSOP), active product status, and equivalent MSL rating. This part provides the most direct replacement path.

Alternative Interface Solutions (Functional Substitutes):

• ADP5585ACBZ-02-R7 (Analog Devices Inc.): I2C interface support, lower voltage range (1.65V ~ 3.6V), different package (16-WLCSP), active product status, MSL 1 rating. Suitable for applications where voltage requirements are within the lower range.
• ADN8102ACPZ-R7 (Analog Devices Inc.): I2C interface support, lower voltage range (1.8V ~ 3.3V), different package (64-LFCSP-VQ), active product status, MSL 3 rating. Applicable for Ethernet controller applications with compatible voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

PCA9546APW,118 (Recommended Primary Substitute): This NXP Semiconductors part is the optimal replacement for the obsolete PCA9546APWT. It maintains identical electrical specifications (2.3V ~ 5.5V supply range), supports both I2C and SMBus protocols, uses the same 16-TSSOP package, and carries active product status with ROHS3 compliance. The MSL 1 rating matches the original part, ensuring equivalent moisture handling requirements. This substitution requires no design modifications.

ADP5585ACBZ-02-R7 (Alternative for Lower Voltage Applications): This Analog Devices part supports I2C interface and operates within a lower voltage range (1.65V ~ 3.6V). It is suitable for applications where the system voltage does not exceed 3.6V. The 16-WLCSP package differs from the original, requiring PCB layout adjustments. Active product status and ROHS3 compliance are confirmed. MSL 1 rating provides equivalent moisture sensitivity characteristics.

ADN8102ACPZ-R7 (Specialized Ethernet Applications): This Analog Devices part is applicable for Ethernet controller interface applications with I2C support. The voltage range (1.8V ~ 3.3V) is lower than the original part. The 64-LFCSP-VQ package represents a significant footprint change requiring substantial PCB redesign. MSL 3 rating indicates stricter moisture handling requirements (168-hour limit) compared to the original MSL 1. This option is suitable only when Ethernet controller functionality is required and voltage specifications align.

Frequently Asked Questions (FAQ)

Q: Can PCA9546APW,118 be used as a direct drop-in replacement for PCA9546APWT?

A: Yes. Both parts share identical electrical specifications, interface protocols (I2C and SMBus), supply voltage range (2.3V ~ 5.5V), and package type (16-TSSOP). No circuit modifications are required. The primary difference is product status: PCA9546APWT is obsolete while PCA9546APW,118 is active.

Q: What are the voltage compatibility constraints when selecting a substitute?

A: The original PCA9546APWT operates from 2.3V to 5.5V. PCA9546APW,118 matches this range exactly. ADP5585ACBZ-02-R7 operates from 1.65V to 3.6V, limiting its use to systems with maximum supply voltage of 3.6V. ADN8102ACPZ-R7 operates from 1.8V to 3.3V, further restricting application to lower voltage systems. Verify system voltage specifications before selection.

Q: How do package differences affect substitution decisions?

A: PCA9546APWT and PCA9546APW,118 both use 16-TSSOP packaging, allowing direct PCB compatibility. ADP5585ACBZ-02-R7 uses 16-WLCSP packaging, requiring PCB layout modifications. ADN8102ACPZ-R7 uses 64-LFCSP-VQ packaging, necessitating significant redesign. Package selection impacts board space, thermal management, and manufacturing processes.

Q: What is the significance of MSL ratings in substitute selection?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to moisture before soldering. PCA9546APWT, PCA9546APW,118, and ADP5585ACBZ-02-R7 all carry MSL 1 (unlimited exposure). ADN8102ACPZ-R7 carries MSL 3 (168-hour limit), requiring stricter handling and storage protocols. For applications with extended pre-soldering exposure, MSL 1 parts are preferred.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. PCA9546APWT, PCA9546APW,118, ADP5585ACBZ-02-R7, and ADN8102ACPZ-R7 are all ROHS3 compliant, meeting environmental and regulatory requirements for restricted hazardous substances.

Q: Which substitute is best for SMBus protocol applications?

A: PCA9546APW,118 is the only active substitute that supports both I2C and SMBus protocols, matching the original PCA9546APWT functionality. ADP5585ACBZ-02-R7 and ADN8102ACPZ-R7 support I2C only and are not suitable for SMBus-dependent applications.