PCA9546ADR Equivalent & Substitute Parts

Part Overview

The PCA9546ADR is a translating switch interface IC manufactured by Texas Instruments, designed for I2C and SMBus applications. This 16-SOIC surface mount component operates across a supply voltage range of 2.3V to 5.5V and is currently in active product status with full RoHS3 compliance. The part is widely used in systems requiring I2C bus switching and signal translation functionality. Substitute parts may be required due to inventory constraints, end-of-life considerations, or specific application requirements that demand alternative package configurations or electrical characteristics.

Substiute Parts

PCA9546ADR

Texas InstrumentsIn Stock: 3221PCA9546ADR Datasheet

Current PartRFQ

ADP5585ACPZ-00-R7

Analog Devices Inc.In Stock: 3270ADP5585ACPZ-00-R7 Datasheet

MFR RecommendedRFQ

PCA9546AD,118

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCA9546ADR is determined by the following critical parameters: interface protocol compatibility (I2C/SMBus support), supply voltage range overlap, package type and form factor, mounting technology, and regulatory compliance status. Parts are grouped into two categories based on these criteria.

Category 1 - Direct Package Equivalent: Parts maintaining identical or compatible package specifications (16-SOIC) with matching interface protocols and overlapping voltage ranges.

Category 2 - Alternative Package with Functional Compatibility: Parts offering the same interface functionality but in different package configurations, suitable for applications where package flexibility is acceptable.

The PCA9546AD,118 falls into Category 1 as a direct equivalent. The ADP5585ACPZ-00-R7 falls into Category 2 due to its different package type (16-LFCSP) and narrower voltage range, requiring design verification for voltage compatibility.

Parameter Comparison

Engineering Selection Recommendations

PCA9546AD,118 (NXP USA Inc.): This substitute provides direct compatibility with the PCA9546ADR. Both parts share identical package specifications (16-SOIC), matching voltage supply ranges (2.3V ~ 5.5V), and equivalent interface protocols (I2C, SMBus). Both maintain active product status, ROHS3 compliance, and MSL 1 rating. This part is suitable for direct replacement in existing designs without PCB modifications.

ADP5585ACPZ-00-R7 (Analog Devices Inc.): This substitute offers I2C interface compatibility but operates within a narrower voltage range (1.65V ~ 3.6V) compared to the main part. The package configuration differs (16-LFCSP versus 16-SOIC), requiring PCB layout changes. The higher moisture sensitivity level (MSL 3) may impact storage and handling requirements. This part is suitable only for applications operating within the 1.65V ~ 3.6V range where package flexibility is acceptable.

All three parts maintain active product status and full regulatory compliance (ROHS3, REACH Unaffected, EAR99 classification).

Frequently Asked Questions (FAQ)

Q: Can PCA9546AD,118 be used as a direct replacement for PCA9546ADR?

A: Yes. Both parts share identical package specifications (16-SOIC with 0.154" width, 3.90mm), matching supply voltage ranges (2.3V ~ 5.5V), and equivalent interface protocols (I2C, SMBus). No design modifications are required.

Q: What are the limitations of using ADP5585ACPZ-00-R7 as a substitute?

A: The ADP5585ACPZ-00-R7 operates within a narrower voltage range (1.65V ~ 3.6V), which may not be compatible with applications requiring the full 2.3V ~ 5.5V range of the PCA9546ADR. Additionally, the package type differs (16-LFCSP versus 16-SOIC), requiring PCB layout redesign. The higher moisture sensitivity level (MSL 3 versus MSL 1) requires stricter storage and handling protocols.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three parts—PCA9546ADR, PCA9546AD,118, and ADP5585ACPZ-00-R7—are ROHS3 compliant and REACH unaffected.

Q: What is the primary difference between the two substitute options?

A: PCA9546AD,118 is a direct package equivalent requiring no design changes. ADP5585ACPZ-00-R7 requires PCB layout modifications due to its different package type and operates within a narrower voltage specification.

Q: Do all parts support both I2C and SMBus protocols?

A: PCA9546ADR and PCA9546AD,118 support both I2C and SMBus. ADP5585ACPZ-00-R7 supports I2C only.