PCA9548ADW Equivalent & Substitute Parts

Part Overview

The PCA9548ADW is a translating switch interface IC manufactured by Texas Instruments, designed for I2C and SMBus applications. This 24-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 equivalent and substitute parts is essential for design continuity and long-term component availability.

Substiute Parts

PCA9548ADW

Texas InstrumentsIn Stock: 60415PCA9548ADW Datasheet

Current PartRFQ

TCA9548APWR

Texas InstrumentsIn Stock: 202284TCA9548APWR Datasheet

MFR RecommendedRFQ

PCA9548AD,118

NXP USA Inc.In Stock: 2399PCA9548AD,118 Datasheet

DirectRFQ

ADP5585ACPZ-03-R7

Analog Devices Inc.In Stock: 2055ADP5585ACPZ-03-R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PCA9548ADW is determined by the following critical parameters:

• Interface Protocol: I2C and SMBus compatibility
• Supply Voltage Range: Minimum 2.3V support for low-voltage applications
• Package Type: 24-pin surface mount configuration
• Functional Classification: Translating switch or equivalent bus switching interface
• Compliance: ROHS3 compliance and REACH unaffected status

The substitute parts identified fall into two categories based on these parameters:

1. Direct Functional Equivalent (Same Base Product): PCA9548AD,118 maintains identical functional specifications with the same base product number and interface protocol.

2. Alternative Interface Solutions: TCA9548APWR and ADP5585ACPZ-03-R7 provide I2C-based interface functionality but with different package configurations and voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

PCA9548AD,118 is the primary substitute for direct replacement. This part maintains identical I2C and SMBus interface specifications, operates across the same voltage supply range with dual-band support (2.3V ~ 3.6V and 4.5V ~ 5.5V), and uses the same 24-SOIC package footprint. The part is manufactured by NXP USA Inc. and carries Active product status with full ROHS3 compliance and unlimited moisture sensitivity rating. This part requires no PCB redesign and provides seamless functional compatibility.

TCA9548APWR serves as an alternative for applications where package size reduction is acceptable. This Texas Instruments bus switch operates across 1.65V ~ 5.5V and uses a smaller 24-TSSOP package (0.173" width versus 0.295"). The functional interface remains I2C-compatible, though the reduced pin pitch requires PCB layout modification. This part is Active status with ROHS3 compliance.

ADP5585ACPZ-03-R7 is suitable only for applications where I/O expansion functionality is required alongside keypad entry support. This Analog Devices part operates at 1.65V ~ 3.6V, uses a 16-pin LFCSP package, and carries a Moisture Sensitivity Level of 3. This option requires significant PCB redesign and is not recommended for direct substitution of the PCA9548ADW translating switch function.

Frequently Asked Questions (FAQ)

Q: Can PCA9548AD,118 be used as a direct drop-in replacement for PCA9548ADW?

A: Yes. Both parts share the same 24-SOIC package footprint, identical I2C and SMBus interface protocols, and compatible voltage supply ranges. No PCB modifications are required.

Q: What is the key difference between PCA9548ADW and TCA9548APWR?

A: The primary difference is package configuration. PCA9548ADW uses 24-SOIC (0.295" width), while TCA9548APWR uses 24-TSSOP (0.173" width). Both maintain I2C interface compatibility, but TCA9548APWR requires PCB layout redesign due to reduced pin pitch.

Q: Is ADP5585ACPZ-03-R7 a suitable replacement for the PCA9548ADW?

A: ADP5585ACPZ-03-R7 is not recommended as a direct substitute. While both are I2C interface components, the ADP5585 is designed for keypad entry and I/O expansion applications with a 16-pin LFCSP package. Functional compatibility cannot be assured without application-specific verification.

Q: What compliance certifications apply to all substitute parts?

A: All identified substitute parts carry ROHS3 compliance and REACH unaffected status, matching the original PCA9548ADW specifications.

Q: Why is PCA9548ADW classified as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued this product line. Existing inventory is available for final orders, but long-term availability is not guaranteed. Migration to active alternatives such as PCA9548AD,118 is recommended for new designs.

Q: Does moisture sensitivity affect component selection?

A: PCA9548ADW and its primary substitute PCA9548AD,118 both carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling requirements. ADP5585ACPZ-03-R7 carries MSL 3 (168 Hours), requiring controlled storage and handling procedures.