PCA9543AD,118 Equivalent & Substitute Parts

Part Overview

The PCA9543AD,118 is a 2-Channel I2C Multiplexer Interface manufactured by NXP USA Inc., designed for applications requiring I2C and SMBus protocol management across multiple channels. This component operates within a supply voltage range of 2.3V to 5.5V and is housed in a 14-SOIC package format. The part is currently in Active product status with 3487 units available in inventory.

Substitute parts become necessary when the primary part reaches end-of-life status, experiences supply constraints, or when alternative packaging formats better suit manufacturing requirements. The parts listed below maintain electrical and mechanical compatibility based on identical interface protocols, voltage specifications, and package dimensions.

Substiute Parts

PCA9543AD,118

NXP USA Inc.In Stock: 3517PCA9543AD,118 Datasheet

Current PartRFQ

PCA9543AD

Texas InstrumentsIn Stock: 3337PCA9543AD Datasheet

MFR RecommendedRFQ

PCA9543ADR

Texas InstrumentsIn Stock: 5177PCA9543ADR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCA9543AD,118 is determined by the following critical parameters:

Interface Protocol Compatibility: All substitute parts must support I2C and SMBus protocols to maintain functional equivalence in multiplexing applications.

Electrical Specifications: Supply voltage range must encompass or match the 2.3V to 5.5V specification to ensure operation across the same system voltage domains.

Package Dimensions: The 14-SOIC package format with 0.154" width and 3.90mm width specification is mandatory for PCB layout compatibility and automated assembly processes.

Mounting Technology: Surface Mount technology is required for compatibility with standard manufacturing equipment and assembly workflows.

Regulatory Compliance: ROHS3 compliance and REACH Unaffected status ensure substitutes meet environmental and regulatory requirements equivalent to the primary part.

The substitute parts listed below satisfy all these criteria, with variations limited to manufacturer identity and packaging delivery format (Tape & Reel, Cut Tape, or Tube).

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: PCA9543AD,118 (NXP USA Inc.) remains the recommended choice due to Active product status and established supply availability of 3487 units.

Secondary Selection: PCA9543ADR (Texas Instruments) is the preferred substitute, offering the highest inventory level at 5100 units and Active product status. The Cut Tape and Digi-Reel® packaging format provides flexibility for both high-volume and low-volume manufacturing scenarios.

Tertiary Selection: PCA9543AD (Texas Instruments) is available as an alternative with 3290 units in stock. This part carries Last Time Buy status, indicating limited future availability. Selection of this part should be evaluated against long-term supply chain requirements.

All three parts maintain identical electrical specifications, package dimensions, and regulatory compliance certifications, ensuring direct functional substitution within system designs.

Frequently Asked Questions (FAQ)

Q: Can PCA9543AD from Texas Instruments directly replace the NXP PCA9543AD,118?

A: Yes. Both parts share identical interface protocols (I2C, SMBus), supply voltage range (2.3V to 5.5V), package format (14-SOIC with 0.154" width), and regulatory compliance status (ROHS3, REACH Unaffected). The primary difference is packaging delivery format and manufacturer identity.

Q: What is the difference between PCA9543AD and PCA9543ADR?

A: Both parts are functionally equivalent with identical electrical and mechanical specifications. The difference lies in packaging delivery format: PCA9543AD is supplied in Tube format, while PCA9543ADR is supplied in Cut Tape and Digi-Reel® format. Selection depends on manufacturing process requirements and volume handling procedures.

Q: Does product status affect substitution eligibility?

A: Product status indicates supply continuity but does not affect electrical or mechanical compatibility. The PCA9543AD (Last Time Buy status) remains functionally equivalent to Active parts. However, long-term supply planning should prioritize parts with Active status for new designs.

Q: Are there any package dimension variations among these substitutes?

A: No. All three parts use the 14-SOIC package with identical dimensions of 0.154" width and 3.90mm width. PCB layouts and assembly processes require no modification when substituting between these parts.

Q: What packaging format should be selected for high-volume production?

A: Tape & Reel (TR) and Cut Tape (CT) formats are optimized for automated assembly equipment. The PCA9543ADR in Cut Tape and Digi-Reel® format offers flexibility for both high-volume and lower-volume production runs.