PCA9554DWR Equivalent & Substitute Parts

Part Overview

The PCA9554DWR is an 8-bit I/O expander interface circuit manufactured by Texas Instruments, designed for I2C and SMBus communication at 400 kHz. The device is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. Equivalent and substitute parts maintain functional compatibility through matching electrical specifications and package configurations while offering active product status alternatives.

Substiute Parts

PCA9554DWR

Texas InstrumentsIn Stock: 2756PCA9554DWR Datasheet

Current PartRFQ

TCA9554DWR

Texas InstrumentsIn Stock: 770TCA9554DWR Datasheet

MFR RecommendedRFQ

TCA9554PWR

Texas InstrumentsIn Stock: 42237TCA9554PWR Datasheet

MFR RecommendedRFQ

PCA9554AD,118

NXP USA Inc.In Stock: 3992PCA9554AD,118 Datasheet

MFR RecommendedRFQ

PCA9554D,118

NXP USA Inc.In Stock: 100226PCA9554D,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9554DWR is determined by the following critical parameters:

Functional Equivalence Requirements:

• 8-bit I/O expander architecture
• I2C and SMBus protocol support at 400 kHz
• Push-pull output configuration with interrupt capability
• Power-on reset (POR) feature

Electrical Compatibility Requirements:

• Supply voltage range must encompass or match 2.3V ~ 5.5V
• Output current specifications: 10mA source, 25mA sink
• Operating temperature range: -40°C ~ 85°C
• Compliance certifications: ROHS3, REACH Unaffected, EAR99

Package Compatibility:

• Primary substitute: 16-SOIC package (0.295", 7.50mm Width)
• Alternative substitute: 16-TSSOP package (0.173", 4.40mm Width) with PCB layout modification

Substitute parts are grouped by manufacturer (Texas Instruments and NXP USA Inc.) and packaging format (Cut Tape & Digi-Reel or Tape & Reel).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (16-SOIC Package):

PCA9554D,118 and PCA9554AD,118 (NXP USA Inc.) are direct functional equivalents with identical electrical specifications to the PCA9554DWR. Both maintain the 2.3V ~ 5.5V supply voltage range, 10mA/25mA output current, and I2C/SMBus protocol support. PCA9554D,118 offers significantly higher inventory availability (100200 Pcs) compared to PCA9554AD,118 (3965 Pcs), making it the preferred choice for production volume requirements. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating.

TCA9554DWR (Texas Instruments) maintains the same 16-SOIC package and active product status. However, the supply voltage range is extended to 1.65V ~ 5.5V, and output current specifications are not provided in the data. This part is suitable for applications requiring lower voltage operation but should be evaluated for output drive capability requirements.

Alternative Substitute (16-TSSOP Package):

TCA9554PWR (Texas Instruments) provides functional equivalence with a different package format (16-TSSOP). This part offers the highest inventory availability (42131 Pcs), active product status, extended voltage range (1.65V ~ 5.5V), and specified output current matching the original part (10mA, 25mA). Package conversion from 16-SOIC to 16-TSSOP requires PCB layout modification and is suitable only when design flexibility permits.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification, matching the original part's regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can PCA9554D,118 directly replace PCA9554DWR without circuit modification?

A: Yes. Both parts share identical electrical specifications (8-bit I/O, I2C/SMBus 400 kHz, 2.3V ~ 5.5V supply, 10mA/25mA output current) and the same 16-SOIC package. The only difference is the packaging format (Cut Tape & Digi-Reel vs. Tape & Reel), which does not affect circuit functionality.

Q: What is the difference between TCA9554DWR and PCA9554D,118?

A: TCA9554DWR has an extended supply voltage range (1.65V ~ 5.5V) compared to PCA9554D,118 (2.3V ~ 5.5V). TCA9554DWR does not specify output current ratings. Both maintain the same package, protocol, and clock frequency. Selection depends on minimum voltage requirements and output drive specifications for the application.

Q: Is TCA9554PWR compatible with PCA9554DWR?

A: TCA9554PWR is functionally equivalent but uses a different package (16-TSSOP instead of 16-SOIC). The electrical specifications match the original part, including output current (10mA, 25mA) and I2C/SMBus support. Package conversion requires PCB redesign and is not a direct pin-for-pin replacement.

Q: Why is PCA9554DWR marked as obsolete?

A: Product obsolescence indicates the part is no longer manufactured by Texas Instruments. Active substitute parts from both Texas Instruments (TCA9554 series) and NXP USA Inc. (PCA9554 series) provide equivalent functionality and are recommended for new designs and production continuity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original PCA9554DWR.

Q: Which substitute part offers the best inventory availability?

A: PCA9554D,118 (NXP USA Inc.) provides the highest inventory availability at 100200 Pcs, followed by TCA9554PWR (Texas Instruments) at 42131 Pcs. Both are active products suitable for production requirements.