PCA9544APW/G-T Equivalent & Substitute Parts

Part Overview

The PCA9544APW/G-T is a translating switch interface IC manufactured by NXP Semiconductors, designed for I2C and SMBus applications. This component is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. The part operates across dual voltage supply ranges (2.3V ~ 3.6V and 4.5V ~ 5.5V) and is packaged in a 20-TSSOP surface mount configuration. Equivalent substitutes maintain identical electrical specifications and mechanical compatibility while offering active product status or improved availability.

Substiute Parts

PCA9544APW/G-T

NXP SemiconductorsIn Stock: 1184PCA9544APW/G-T Datasheet

Current PartRFQ

PCA9544APW,118

NXP USA Inc.In Stock: 3014PCA9544APW,118 Datasheet

DirectRFQ

PCA9544APW

Texas InstrumentsIn Stock: 65882PCA9544APW Datasheet

MFR RecommendedRFQ

PCA9544APWR

Texas InstrumentsIn Stock: 29237PCA9544APWR Datasheet

MFR RecommendedRFQ

PCA9544APWT

Texas InstrumentsIn Stock: 2433PCA9544APWT Datasheet

MFR RecommendedRFQ

TCA9544APWR

Texas InstrumentsIn Stock: 700108TCA9544APWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCA9544APW/G-T is determined by the following critical parameters:

• Package / Case: 20-TSSOP (0.173", 4.40mm Width) — mechanical and electrical pin compatibility
• Interface Protocol: I2C, SMBus — functional protocol compatibility
• Voltage - Supply Range: Minimum 2.3V operation and maximum 5.5V operation
• Mounting Type: Surface Mount — PCB assembly compatibility
• RoHS & REACH Compliance: ROHS3 Compliant, REACH Unaffected — regulatory alignment

Substitute parts are grouped into two categories: direct equivalents (identical electrical and mechanical specifications) and functional alternatives (compatible protocols and packaging with extended voltage ranges).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

PCA9544APW,118 (NXP USA Inc.) is the direct equivalent with identical electrical specifications and active product status. This part maintains the dual voltage supply range (2.3V ~ 3.6V, 4.5V ~ 5.5V) and is available in Tape & Reel packaging with superior inventory levels (2919 Pcs).

PCA9544APWR (Texas Instruments) is functionally compatible with extended voltage range (2.3V ~ 5.5V continuous) and active product status. This part offers the highest inventory availability (29200 Pcs) among active alternatives and is packaged in Cut Tape & Digi-Reel format.

Secondary Substitutes (Functional Alternatives):

PCA9544APW (Texas Instruments) provides functional compatibility with extended voltage range but carries obsolete product status. This part is suitable only when new stock procurement is not feasible.

PCA9544APWT (Texas Instruments) is functionally compatible with extended voltage range but is obsolete. Selection of this part is not recommended for new designs.

TCA9544APWR (Texas Instruments) operates across the widest voltage range (1.65V ~ 5.5V) and maintains active product status with exceptional inventory availability (700024 Pcs). This part is categorized as Logic rather than Interface but maintains I2C/SMBus protocol compatibility and identical package specifications.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating, ensuring regulatory and environmental compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can PCA9544APW,118 be used as a direct replacement for PCA9544APW/G-T?

A: Yes. PCA9544APW,118 is a direct equivalent with identical electrical specifications, interface protocols, and package configuration. The primary difference is packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and active product status.

Q: What is the voltage range difference between NXP and Texas Instruments versions?

A: NXP versions (PCA9544APW/G-T and PCA9544APW,118) specify dual voltage ranges: 2.3V ~ 3.6V and 4.5V ~ 5.5V. Texas Instruments versions specify a continuous range: 2.3V ~ 5.5V. Both specifications cover the same operational envelope; the TI specification is expressed as a single continuous range.

Q: Is TCA9544APWR compatible with PCA9544APW/G-T?

A: TCA9544APWR is mechanically and electrically compatible. Both parts use the 20-TSSOP package, support I2C and SMBus protocols, and maintain identical compliance certifications. TCA9544APWR operates across a wider voltage range (1.65V ~ 5.5V) and is categorized as Logic rather than Interface, but functional compatibility is maintained.

Q: What packaging formats are available among substitute parts?

A: Substitute parts are available in two packaging formats: Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel. Both formats are surface mount compatible and suitable for automated PCB assembly. Selection depends on procurement volume and assembly line requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original PCA9544APW/G-T specification.

Q: Which substitute part offers the best availability?

A: TCA9544APWR (Texas Instruments) offers the highest inventory availability at 700024 Pcs. For direct NXP equivalents, PCA9544APW,118 provides 2919 Pcs in stock.