PCA9554CPWJ Equivalent & Substitute Parts

Part Overview

The PCA9554CPWJ is an 8-bit I/O expander with I2C and SMBus interface operating at 400 kHz, manufactured by NXP USA Inc. in a 16-TSSOP surface mount package. This device is currently in active product status with 3784 units in stock. Substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers are preferred for supply chain diversification, or when design requirements allow for compatible alternatives that meet the same electrical and mechanical specifications.

Substiute Parts

PCA9554CPWJ

NXP USA Inc.In Stock: 3892PCA9554CPWJ Datasheet

Current PartRFQ

PCA9654EDTR2G

onsemiIn Stock: 10226PCA9654EDTR2G Datasheet

MFR RecommendedRFQ

PI4IOE5V9554LEX

Diodes IncorporatedIn Stock: 142674PI4IOE5V9554LEX Datasheet

MFR RecommendedRFQ

TCA9534APWR

Texas InstrumentsIn Stock: 2376TCA9534APWR Datasheet

MFR RecommendedRFQ

TCA9534PWR

Texas InstrumentsIn Stock: 165243TCA9534PWR Datasheet

MFR RecommendedRFQ

TCA9554APWR

Texas InstrumentsIn Stock: 164732TCA9554APWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9554CPWJ is determined by the following critical parameters:

• Number of I/O: Must be 8 bits
• Interface Protocol: Must support I2C (SMBus support is optional)
• Clock Frequency: 400 kHz operation required for direct substitution
• Package Type: 16-TSSOP form factor mandatory for PCB compatibility
• Voltage Supply Range: Must encompass or match 1.65V ~ 5.5V
• Operating Temperature Range: Must cover -40°C ~ 85°C minimum
• Output Type: Push-Pull configuration required
• Interrupt Output: Must be present
• RoHS Compliance: ROHS3 Compliant status required

Substitute parts are grouped into two categories: direct equivalents (matching all critical parameters) and functional alternatives (meeting core I/O expansion requirements with compatible electrical characteristics).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Highest Compatibility)

TCA9554APWR (Texas Instruments) and TCA9534PWR (Texas Instruments) are the primary direct substitutes for the PCA9554CPWJ. Both devices match all critical electrical parameters including 400 kHz clock frequency, 1.65V ~ 5.5V supply voltage range, -40°C ~ 85°C operating temperature, and 16-TSSOP package. TCA9554APWR additionally supports SMBus protocol identical to the main part. Both are in active product status with ROHS3 compliance and MSL 1 rating. TCA9554APWR has 164,662 units in stock; TCA9534PWR has 165,200 units in stock.

Compatible Alternatives

TCA9534APWR (Texas Instruments) is functionally compatible but does not specify output current source/sink ratings. This part is in active status with ROHS3 compliance and operates within the required temperature and voltage ranges at 400 kHz.

PI4IOE5V9554LEX (Diodes Incorporated) operates at 400 kHz with 8-bit I/O and I2C interface in 16-TSSOP package. The minimum supply voltage is 2.3V, which is higher than the main part's 1.65V minimum. This part is in active status with 142,600 units in stock and ROHS3 compliance.

Not Recommended for Direct Substitution

PCA9654EDTR2G (onsemi) operates at 100 kHz clock frequency, which is below the 400 kHz specification of the main part. Although this part is ROHS3 compliant with MSL 1 rating and matches the 16-TSSOP package, the reduced clock frequency makes it unsuitable for applications requiring 400 kHz I2C operation. Additionally, this part is in obsolete product status.

Frequently Asked Questions (FAQ)

Q: Can I use TCA9554APWR as a direct replacement for PCA9554CPWJ?

A: Yes. TCA9554APWR matches all critical parameters including 8-bit I/O, I2C/SMBus interface, 400 kHz clock frequency, 1.65V ~ 5.5V supply voltage, -40°C ~ 85°C operating temperature, 16-TSSOP package, push-pull output type, and POR feature. Both are ROHS3 compliant with MSL 1 rating and active product status.

Q: What is the difference between TCA9554APWR and TCA9534PWR?

A: Both devices are functionally equivalent for I/O expansion with 8 bits, 400 kHz I2C operation, and identical electrical specifications. The primary difference is that TCA9554APWR explicitly specifies 10mA and 25mA output source/sink current ratings, while TCA9534PWR does not provide this specification in the available data. Both are in active status with equivalent inventory levels.

Q: Why is PCA9654EDTR2G listed as a substitute if it operates at 100 kHz?

A: PCA9654EDTR2G is included in the substitute list based on the provided input data, but it is not recommended for direct substitution due to its 100 kHz clock frequency specification, which does not meet the 400 kHz requirement of the main part. This part is also in obsolete product status.

Q: Is PI4IOE5V9554LEX compatible with designs requiring 1.65V supply voltage?

A: No. PI4IOE5V9554LEX has a minimum supply voltage of 2.3V, which exceeds the main part's 1.65V minimum specification. This part is suitable only for applications with supply voltages of 2.3V or higher.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts listed are available in 16-TSSOP (0.173", 4.40mm Width) surface mount package, ensuring mechanical compatibility with existing PCB designs.

Q: What is the inventory status for substitute parts?

A: TCA9554APWR has 164,662 units in stock, TCA9534PWR has 165,200 units in stock, TCA9534APWR has 2,272 units in stock, PI4IOE5V9554LEX has 142,600 units in stock, and PCA9654EDTR2G has 10,214 units in stock.