PCA9546ADGVR Equivalent & Substitute Parts

Part Overview

The PCA9546ADGVR is a translating switch interface IC manufactured by Texas Instruments, designed for I2C and SMBus applications. This 16-TVSOP surface mount component operates across a supply voltage range of 2.3V to 5.5V and is currently classified as Last Time Buy, indicating end-of-life status. Due to this product status, identifying functionally equivalent substitute components is essential for design continuity and long-term supply chain planning.

Substiute Parts

PCA9546ADGVR

Texas InstrumentsIn Stock: 894PCA9546ADGVR Datasheet

Current PartRFQ

TCA9546APWR

Texas InstrumentsIn Stock: 118175TCA9546APWR Datasheet

MFR RecommendedRFQ

ADP5585ACBZ-04-R7

Analog Devices Inc.In Stock: 12052ADP5585ACBZ-04-R7 Datasheet

MFR RecommendedRFQ

ADP5586ACBZ-03-R7

Analog Devices Inc.In Stock: 4017ADP5586ACBZ-03-R7 Datasheet

MFR RecommendedRFQ

CA91L862A-50IE

Renesas Electronics CorporationIn Stock: 1998CA91L862A-50IE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCA9546ADGVR are evaluated based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Interface Protocol: I2C or SMBus compatibility
• Package Type: Surface mount configuration with compatible footprint dimensions
• Voltage Supply Range: Overlap or compatibility with 2.3V ~ 5.5V operating range
• RoHS Compliance: ROHS3 Compliant status for regulatory alignment
• Moisture Sensitivity Level: MSL 1 or equivalent for handling and storage compatibility

Substitute Parts Identified:

1. TCA9546APWR (Texas Instruments) - Active product status, bus switch configuration with I2C interface
2. ADP5585ACBZ-04-R7 (Analog Devices Inc.) - Active product status, I2C interface with I/O expansion capability
3. ADP5586ACBZ-03-R7 (Analog Devices Inc.) - Active product status, I2C interface with I/O expansion capability
4. CA91L862A-50IE (Renesas Electronics Corporation) - Active product status, interface IC with PCI and Serial protocols

Parameter Comparison

Engineering Selection Recommendations

TCA9546APWR is the primary recommended substitute. It is manufactured by Texas Instruments (same original manufacturer), maintains ROHS3 compliance, features MSL 1 rating, and is in active production status. The 16-TSSOP package is mechanically compatible with the original 16-TFSOP footprint. Voltage supply range of 1.65V ~ 5.5V encompasses the original specification.

ADP5585ACBZ-04-R7 and ADP5586ACBZ-03-R7 are secondary alternatives from Analog Devices Inc. Both maintain ROHS3 compliance and MSL 1 rating with active product status. However, the voltage supply range of 1.65V ~ 3.6V is narrower than the original 2.3V ~ 5.5V specification. The 16-WLCSP package represents a different form factor requiring PCB layout modification.

CA91L862A-50IE is not recommended as a direct substitute. While it provides interface functionality, it is RoHS non-compliant, carries MSL 3 rating, and operates at fixed 3.3V supply. The 256-PBGA package is significantly larger and requires substantial design changes.

Frequently Asked Questions (FAQ)

Q: Can TCA9546APWR directly replace PCA9546ADGVR without PCB modifications?

A: The TCA9546APWR uses 16-TSSOP packaging compared to the original 16-TFSOP. Both packages share identical 0.173" width and 4.40mm dimensions, making them mechanically compatible on standard PCB layouts. Pin configuration alignment should be verified against datasheets before implementation.

Q: What is the voltage supply compatibility difference between PCA9546ADGVR and ADP5585ACBZ-04-R7?

A: The PCA9546ADGVR operates from 2.3V to 5.5V, while ADP5585ACBZ-04-R7 operates from 1.65V to 3.6V. If your application requires operation above 3.6V, the Analog Devices option is not suitable. TCA9546APWR supports the full 1.65V to 5.5V range, providing broader compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: TCA9546APWR, ADP5585ACBZ-04-R7, and ADP5586ACBZ-03-R7 are ROHS3 compliant. CA91L862A-50IE is RoHS non-compliant and should not be used in applications requiring RoHS certification.

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

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture control requirements. Components can be stored at room temperature without desiccant packaging. All recommended substitutes carry MSL 1 rating, matching the original part's handling requirements.

Q: Why is CA91L862A-50IE listed as a substitute if it has significant differences?

A: CA91L862A-50IE appears in the original part's substitute list but does not meet the primary substitution criteria for direct replacement. It serves as a functional alternative only in applications where the 256-PBGA package, fixed 3.3V supply, and RoHS non-compliance are acceptable design trade-offs.