PCA9548APW,112 Equivalent & Substitute Parts

Part Overview

The PCA9548APW,112 is a translating switch interface IC manufactured by NXP USA Inc., designed for I2C and SMBus applications. This component operates across dual voltage ranges (2.3V ~ 3.6V and 4.5V ~ 5.5V) in a 24-TSSOP package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design considerations.

Substiute Parts

PCA9548APW,112

NXP USA Inc.In Stock: 2330PCA9548APW,112 Datasheet

Current PartRFQ

PCA9548ADB

Texas InstrumentsIn Stock: 2264PCA9548ADB Datasheet

MFR RecommendedRFQ

PCA9548ADBR

Texas InstrumentsIn Stock: 25486PCA9548ADBR Datasheet

MFR RecommendedRFQ

PCA9548APWR

Texas InstrumentsIn Stock: 4485PCA9548APWR Datasheet

MFR RecommendedRFQ

TCA9548APWR

Texas InstrumentsIn Stock: 202284TCA9548APWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCA9548APW,112 is determined by the following critical parameters:

• Interface Protocol: I2C and SMBus compatibility
• Package Type: 24-TSSOP or 24-SSOP form factors
• Voltage Supply Range: Minimum coverage of 2.3V ~ 5.5V operating window
• Mounting Type: Surface mount configuration
• Application Function: Translating switch or bus switch operation
• Compliance Standards: ROHS3 compliance and MSL rating

Substitute parts must maintain functional equivalence in I2C/SMBus signal translation while accommodating the specified package and voltage parameters. Package variations between 24-TSSOP (0.173" width) and 24-SSOP (0.209" width) represent acceptable mechanical substitutions when PCB layout permits.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: PCA9548ADBR

PCA9548ADBR is the recommended substitute for PCA9548APW,112 applications. This Texas Instruments part maintains active product status, ensuring long-term availability and manufacturing support. It provides expanded voltage coverage (2.3V ~ 5.5V) compared to the original dual-range specification, offering superior compatibility across system designs. The 24-SSOP package (0.209" width) represents a minor mechanical variation from the original 24-TSSOP form factor but remains functionally equivalent when PCB layout accommodates the increased width. Inventory availability (25,417 units) supports both immediate replacement and production scaling.

Secondary Substitute: PCA9548APWR

PCA9548APWR offers identical package geometry (24-TSSOP) to the original part, eliminating mechanical redesign requirements. However, this part carries "Not For New Designs" status, limiting its suitability for long-term system development. It remains acceptable for legacy system maintenance where package compatibility is critical.

Alternative Substitute: TCA9548APWR

TCA9548APWR provides the widest voltage operating range (1.65V ~ 5.5V) and maintains active product status with substantial inventory (202,230 units). The identical 24-TSSOP package ensures direct mechanical compatibility. This part is classified as a bus switch rather than a translating switch interface, but maintains functional equivalence for I2C and SMBus applications. This option is suitable for new designs requiring maximum voltage flexibility.

Frequently Asked Questions (FAQ)

Q: Can PCA9548ADB be used as a direct replacement for PCA9548APW,112?

A: PCA9548ADB is functionally equivalent but uses a 24-SSOP package (0.209" width) instead of the original 24-TSSOP (0.173" width). PCB layout modification is required to accommodate the wider package. Electrical performance and I2C/SMBus compatibility are maintained.

Q: What is the difference between 24-TSSOP and 24-SSOP packages?

A: Both are surface-mount packages with 24 pins. The primary difference is width: 24-TSSOP measures 0.173" (4.40mm) while 24-SSOP measures 0.209" (5.30mm). Pin pitch and electrical characteristics remain identical. Package selection depends on available PCB real estate.

Q: Why is PCA9548APWR marked "Not For New Designs"?

A: This designation indicates the manufacturer is transitioning away from this part number. While suitable for legacy system support, new product development should prioritize parts with "Active" status to ensure long-term supply chain stability and manufacturing support.

Q: Does TCA9548APWR provide the same functionality as PCA9548APW,112?

A: Yes. Although categorized as a bus switch rather than a translating switch interface, TCA9548APWR performs equivalent I2C and SMBus signal switching operations. The extended voltage range (1.65V ~ 5.5V) provides additional design flexibility for low-voltage applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL rating of 1 (Unlimited), matching the original part's environmental and regulatory specifications.

Q: Which substitute offers the best long-term availability?

A: TCA9548APWR demonstrates the strongest supply position with 202,230 units in inventory and active product status. PCA9548ADBR provides the second-best option with 25,417 units and active status.