PCA9544APW,112 Equivalent & Substitute Parts

Part Overview

The PCA9544APW,112 is a translating switch interface IC manufactured by NXP USA Inc., designed for I2C and SMBus applications. This component operates across dual voltage supply ranges (2.3V ~ 3.6V and 4.5V ~ 5.5V) in a 20-TSSOP surface mount package. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support and new design implementations.

Substiute Parts

PCA9544APW,112

NXP USA Inc.In Stock: 823PCA9544APW,112 Datasheet

Current PartRFQ

PCA9544APW,118

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

MFR RecommendedRFQ

ADP5586ACBZ-00-R7

Analog Devices Inc.In Stock: 2175ADP5586ACBZ-00-R7 Datasheet

MFR RecommendedRFQ

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,112 is determined by the following critical parameters:

Primary Substitution Criteria:

• Interface protocol compatibility (I2C and/or SMBus support)
• Voltage supply range overlap or compatibility
• Package type and form factor (20-TSSOP preferred for direct replacement)
• Surface mount mounting type
• RoHS3 compliance and MSL rating

Substitution Groups:

Group 1: Direct Package Equivalents (20-TSSOP) Parts maintaining identical 20-TSSOP packaging with I2C/SMBus interface support and compatible voltage ranges qualify as direct substitutes. These include PCA9544APW,118, PCA9544APW, PCA9544APWR, PCA9544APWT, and TCA9544APWR.

Group 2: Functional Equivalents (Alternative Package) The ADP5586ACBZ-00-R7 provides I2C interface functionality but uses a 16-WLCSP package with a narrower voltage supply range (1.65V ~ 3.6V), requiring board-level redesign for integration.

Parameter Comparison

Engineering Selection Recommendations

Preferred Substitutes (Active Product Status):

PCA9544APW,118 is the primary recommended substitute, maintaining NXP USA Inc. manufacturing with identical electrical specifications and 20-TSSOP packaging. This part is currently in active production status with 2919 units in stock.

PCA9544APWR (Texas Instruments) provides an active alternative with compatible voltage supply range (2.3V ~ 5.5V) and identical 20-TSSOP package configuration. Inventory availability is 29200 units.

TCA9544APWR (Texas Instruments) operates across an extended voltage supply range (1.65V ~ 5.5V) in the same 20-TSSOP package with active product status and substantial inventory (700024 units).

Secondary Substitutes (Obsolete Status):

PCA9544APW and PCA9544APWT remain available but are classified as obsolete. These parts maintain full electrical and package compatibility but should be considered only when active alternatives are unavailable.

Alternative Functional Equivalent:

ADP5586ACBZ-00-R7 (Analog Devices Inc.) provides I2C interface functionality but requires board-level redesign due to 16-WLCSP package format and narrower voltage supply range (1.65V ~ 3.6V). This option is suitable only for new designs where package constraints permit.

Frequently Asked Questions (FAQ)

Q: Can PCA9544APW,118 directly replace PCA9544APW,112 without design modifications?

A: Yes. Both parts maintain identical electrical specifications (2.3V ~ 3.6V and 4.5V ~ 5.5V supply ranges), I2C/SMBus interface protocols, and 20-TSSOP package dimensions. The primary difference is packaging format (Tape & Reel for the substitute versus unspecified for the original), which does not affect electrical performance or PCB integration.

Q: What is the voltage supply range difference between PCA9544APW,118 and TCA9544APWR?

A: PCA9544APW,118 operates at 2.3V ~ 3.6V and 4.5V ~ 5.5V (dual range). TCA9544APWR operates at a continuous 1.65V ~ 5.5V range. Both ranges encompass the original part's operating envelope, making TCA9544APWR suitable for applications requiring extended low-voltage operation.

Q: Why is ADP5586ACBZ-00-R7 listed as a substitute if it uses a different package?

A: ADP5586ACBZ-00-R7 provides equivalent I2C interface functionality for translating switch and I/O expansion applications. However, the 16-WLCSP package differs from the 20-TSSOP format, requiring PCB redesign. This part is listed as a functional equivalent for new designs only, not for direct replacement scenarios.

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 PCA9544APW,112 specifications.

Q: Which substitute has the highest inventory availability?

A: TCA9544APWR maintains the highest inventory level at 700024 units in stock, followed by PCA9544APWR at 29200 units and PCA9544APW,118 at 2919 units.