PCA9546ADWR Equivalent & Substitute Parts

Part Overview

The PCA9546ADWR 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 classified as Last Time Buy, indicating end-of-life status. Due to this product status, identifying functionally compatible substitute parts is essential for ongoing design support and procurement continuity.

Substiute Parts

PCA9546ADWR

Texas InstrumentsIn Stock: 5506PCA9546ADWR Datasheet

Current PartRFQ

TCA9546ADR

Texas InstrumentsIn Stock: 11711TCA9546ADR Datasheet

MFR RecommendedRFQ

ADP5585ACPZ-01-R7

Analog Devices Inc.In Stock: 3981ADP5585ACPZ-01-R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCA9546ADWR are identified based on the following critical parameters:

Primary Substitution Criteria:

• Interface protocol compatibility (I2C/SMBus support)
• Package type (16-pin SOIC or equivalent footprint)
• Supply voltage range overlap with original specification
• Surface mount technology
• RoHS3 compliance and REACH unaffected status

Substitute Parts Identified:

1. TCA9546ADR (Texas Instruments) - Bus Switch 2 x 1:4 configuration, 16-SOIC package, operates at 1.65V ~ 5.5V, Active product status
2. ADP5585ACPZ-01-R7 (Analog Devices Inc.) - Keypad Entries and I/O Expansion Interface, 16-LFCSP package, operates at 1.65V ~ 3.6V, Active product status

Parameter Comparison

Engineering Selection Recommendations

TCA9546ADR Selection Criteria: The TCA9546ADR is the primary substitute option from Texas Instruments with Active product status. It maintains I2C protocol compatibility and operates within an extended supply voltage range (1.65V ~ 5.5V), which encompasses the original PCA9546ADWR specification. Both components share ROHS3 compliance and MSL 1 rating. Package footprint differences exist (0.154" vs 0.295" width), requiring PCB layout verification. This option provides continuity with the original manufacturer ecosystem.

ADP5585ACPZ-01-R7 Selection Criteria: The ADP5585ACPZ-01-R7 from Analog Devices Inc. is an Active product with I2C interface support. This substitute is suitable for applications where the reduced supply voltage range (1.65V ~ 3.6V) aligns with system requirements. The 16-LFCSP package represents a different form factor requiring PCB redesign. MSL 3 rating indicates higher moisture sensitivity compared to the original component. This option is applicable for low-voltage I/O expansion and keypad entry applications.

Frequently Asked Questions (FAQ)

Q: Can TCA9546ADR directly replace PCA9546ADWR without PCB modifications? A: Both components are 16-pin SOIC packages but differ in width dimensions (0.154" vs 0.295"). Footprint compatibility must be verified against PCB design specifications. Pin configuration alignment is required before implementation.

Q: What is the voltage compatibility range for substitutes? A: The PCA9546ADWR operates at 2.3V ~ 5.5V. TCA9546ADR supports 1.65V ~ 5.5V, providing full compatibility. ADP5585ACPZ-01-R7 operates at 1.65V ~ 3.6V and is suitable only for applications within this lower range.

Q: Are all substitute parts RoHS3 compliant? A: Yes, all identified substitute parts (TCA9546ADR and ADP5585ACPZ-01-R7) are ROHS3 compliant and REACH unaffected, matching the original PCA9546ADWR compliance status.

Q: What is the significance of Moisture Sensitivity Level differences? A: The PCA9546ADWR and TCA9546ADR both have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. The ADP5585ACPZ-01-R7 has MSL 3 (168 Hours), requiring controlled storage and handling conditions within 168 hours of package opening.

Q: Why is PCA9546ADWR classified as Last Time Buy? A: Last Time Buy status indicates the manufacturer is discontinuing this product. Existing inventory is available for final orders, but long-term availability is not guaranteed. Transition to Active substitute parts is recommended for new designs and ongoing production.

Q: Are there functional differences between the substitute parts? A: TCA9546ADR is a bus switch with 2 x 1:4 circuit configuration. ADP5585ACPZ-01-R7 is designed for keypad entries and I/O expansion. Functional compatibility depends on the specific application requirements of the original PCA9546ADWR implementation.