PCA9546APW,112 Equivalent & Substitute Parts

Part Overview

The PCA9546APW,112 is a translating switch interface IC manufactured by NXP USA Inc., designed for I2C and SMBus applications. This 16-TSSOP surface mount component operates across a supply voltage range of 2.3V to 5.5V and is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, identifying equivalent substitute parts is essential for ongoing system design and production continuity.

Substiute Parts

PCA9546APW,112

NXP USA Inc.In Stock: 745PCA9546APW,112 Datasheet

Current PartRFQ

ADP5585ACBZ-04-R7

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

MFR RecommendedRFQ

BU6521KV-E2

Rohm SemiconductorIn Stock: 2440BU6521KV-E2 Datasheet

MFR RecommendedRFQ

PCA9546APWR

Texas InstrumentsIn Stock: 85177PCA9546APWR Datasheet

MFR RecommendedRFQ

PCA9546APWT

Texas InstrumentsIn Stock: 4427PCA9546APWT Datasheet

MFR RecommendedRFQ

TCA9546APWR

Texas InstrumentsIn Stock: 118175TCA9546APWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCA9546APW,112 is determined by the following critical parameters:

Primary Substitution Criteria:

• Interface protocol compatibility (I2C and/or SMBus support)
• Supply voltage range overlap with 2.3V ~ 5.5V
• Package form factor and mounting type (surface mount preferred for PCB compatibility)
• Functional classification as a translating switch or equivalent interface IC
• RoHS3 compliance and MSL rating consistency

Substitute Categories:

1. Direct Package Match (16-TSSOP): Parts maintaining identical package geometry and pinout compatibility
2. Functional Equivalent with Alternative Package: Parts providing translating switch functionality in different surface mount packages
3. Extended Functionality Variants: Parts with enhanced features while maintaining core I2C/SMBus interface capability

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Substitutes (Highest Compatibility):

PCA9546APWR and TCA9546APWR are the primary substitutes for the PCA9546APW,112. Both maintain the 16-TSSOP package geometry, support I2C/SMBus protocols, and operate within overlapping supply voltage ranges. PCA9546APWR is manufactured by Texas Instruments with active product status and 85,100 units in stock, providing superior availability. TCA9546APWR, also from Texas Instruments, is classified as a bus switch with active status and 118,089 units available, offering extended voltage range capability (1.65V ~ 5.5V).

Tier 2 - Functional Equivalents (Alternative Packages):

ADP5585ACBZ-04-R7 from Analog Devices Inc. provides I2C interface functionality in a 16-WLCSP package. This substitute is suitable for applications where package miniaturization is acceptable. The reduced supply voltage range (1.65V ~ 3.6V) requires verification against system requirements. Active product status with 12,000 units in stock ensures availability.

Tier 3 - Extended Functionality (Specialized Applications):

BU6521KV-E2 from Rohm Semiconductor is a video encoder IC with 48-VQFPC package. This part is listed as a substitute but serves a different primary application (camera encoding). Selection requires confirmation that video encoding functionality aligns with system requirements.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL rating of 1 (Unlimited), ensuring compatibility with standard manufacturing and storage protocols. Active product status for PCA9546APWR and TCA9546APWR provides long-term supply chain stability compared to the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can PCA9546APWR directly replace PCA9546APW,112 without PCB modifications?

A: Yes. PCA9546APWR maintains identical 16-TSSOP package geometry, pinout, and electrical specifications (2.3V ~ 5.5V supply, I2C/SMBus interface). No PCB layout changes are required.

Q: What is the key difference between PCA9546APWR and TCA9546APWR?

A: Both are 16-TSSOP translating/bus switch interfaces with I2C/SMBus support. TCA9546APWR extends the lower supply voltage limit to 1.65V (versus 2.3V for PCA9546APWR), providing broader compatibility with low-voltage systems. Functional operation in standard 2.3V ~ 5.5V applications is equivalent.

Q: Why is ADP5585ACBZ-04-R7 listed as a substitute despite different package?

A: ADP5585ACBZ-04-R7 provides equivalent I2C interface functionality for keypad and I/O expansion applications. The 16-WLCSP package is a miniaturized alternative suitable for space-constrained designs. PCB redesign is required for package transition.

Q: Is BU6521KV-E2 suitable for standard translating switch applications?

A: BU6521KV-E2 is a video encoder IC with specialized camera application focus. While listed as a substitute, its primary function differs from translating switch operation. Selection requires confirmation that video encoding capability is required or compatible with system architecture.

Q: What supply voltage range is safe for all substitute parts?

A: The overlapping safe operating range across all substitutes is 2.3V ~ 3.6V. For applications requiring operation above 3.6V, PCA9546APWR and TCA9546APWR support up to 5.5V. ADP5585ACBZ-04-R7 is limited to 3.6V maximum.

Q: Are there inventory or lead-time advantages to selecting specific substitutes?

A: TCA9546APWR offers the highest inventory (118,089 units), followed by PCA9546APWR (85,100 units). Both provide immediate availability. ADP5585ACBZ-04-R7 (12,000 units) and PCA9546APWT (4,390 units) have lower stock levels.

Q: Do all substitutes maintain RoHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited), meeting standard environmental and manufacturing requirements.