PCA9554APW,118 Equivalent & Substitute Parts

Part Overview

The PCA9554APW,118 is an 8-bit I/O expander with I2C and SMBus interface operating at 400 kHz, manufactured by NXP Semiconductors. This interface IC features push-pull output configuration with 10mA/25mA source/sink capability, power-on reset (POR), and interrupt output functionality. The device operates across a 2.3V to 5.5V supply range and is rated for -40°C to 85°C operating temperature in a 16-TSSOP surface mount package.

The PCA9554APW,118 maintains active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and functional equivalence within the I/O expander category.

Substiute Parts

PCA9554APW,118

NXP SemiconductorsIn Stock: 2124PCA9554APW,118 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

Substitute parts for the PCA9554APW,118 are qualified based on the following criteria:

Primary Matching Parameters:

• Number of I/O: 8 bits
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• Mounting Type: Surface Mount
• Interface: I2C or I2C/SMBus
• Interrupt Output: Yes
• RoHS Status: ROHS3 Compliant
• MSL Rating: 1 (Unlimited)

Secondary Compatibility Parameters:

• Clock Frequency: 400 kHz (primary specification)
• Output Type: Push-Pull
• Voltage Supply Range: Minimum 2.3V to 5.5V compatibility
• Operating Temperature: -40°C to 85°C minimum coverage

Substitutes are grouped into two categories: direct equivalents matching all primary parameters, and functional alternatives with compatible electrical specifications within the allowed parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Preferred):

TCA9554APWR (Texas Instruments) and TCA9534PWR (Texas Instruments) are the primary substitutes for the PCA9554APW,118. Both devices maintain active product status, ROHS3 compliance, and MSL 1 rating. TCA9554APWR matches the I2C/SMBus interface specification and 400 kHz clock frequency with identical push-pull output configuration and 10mA/25mA source/sink capability. TCA9534PWR provides equivalent electrical performance with 400 kHz operation and push-pull output at 10mA/25mA ratings, though with I2C interface only.

Compatible Alternatives:

PI4IOE5V9554LEX (Diodes Incorporated) maintains active product status with matching 400 kHz clock frequency, 8-bit I/O configuration, and 16-TSSOP package. This device operates within the 2.3V to 5.5V supply range and -40°C to 85°C temperature specification. High inventory availability (142,600 units) supports supply chain continuity.

TCA9534APWR (Texas Instruments) provides functional compatibility with 400 kHz operation and push-pull output configuration, though output current specifications are not provided in the available data.

Not Recommended:

PCA9654EDTR2G (onsemi) operates at 100 kHz clock frequency, which does not meet the 400 kHz specification of the primary part. Additionally, this device carries obsolete product status. Use of this substitute requires design verification for reduced clock frequency operation.

Frequently Asked Questions (FAQ)

Q: Can TCA9554APWR directly replace PCA9554APW,118 in existing designs?

A: Yes. TCA9554APWR matches the critical parameters: 8-bit I/O configuration, I2C/SMBus interface, 400 kHz clock frequency, push-pull output with 10mA/25mA source/sink capability, 2.3V to 5.5V supply range (within the 1.65V to 5.5V rating), -40°C to 85°C operating temperature, and 16-TSSOP package. Both devices are ROHS3 compliant with MSL 1 rating and active product status.

Q: What is the impact of using PI4IOE5V9554LEX as a substitute?

A: PI4IOE5V9554LEX maintains functional equivalence with 400 kHz I2C operation, 8-bit I/O, interrupt output, and 16-TSSOP packaging. The device operates within the specified voltage and temperature ranges. Output type and current specifications are not provided in the available data; design verification is recommended for applications with specific output drive requirements.

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. However, the 100 kHz clock frequency does not meet the 400 kHz specification of the primary part. This device is suitable only for applications where reduced clock frequency operation is acceptable. The obsolete product status further limits its use in new designs.

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

A: Yes. All listed substitutes use the 16-TSSOP (0.173", 4.40mm Width) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts and sockets.

Q: What is the difference between TCA9534APWR and TCA9534PWR?

A: Both devices are manufactured by Texas Instruments with identical 400 kHz I2C operation, 8-bit I/O, push-pull output, and 16-TSSOP packaging. TCA9534PWR specifies 10mA/25mA output source/sink current, while TCA9534APWR does not provide this specification in the available data. TCA9534PWR is preferred for applications requiring confirmed output drive capability.

Q: Can substitutes be used interchangeably in SMBus applications?

A: TCA9554APWR supports both I2C and SMBus protocols, matching the primary part specification. PI4IOE5V9554LEX, TCA9534APWR, and TCA9534PWR support I2C interface only. For SMBus-specific applications, TCA9554APWR is the appropriate substitute. Other alternatives require design verification for SMBus compatibility.

Q: What compliance certifications apply to all substitute parts?

A: All listed substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the primary part specifications. All devices carry EAR99 ECCN classification and REACH Unaffected status.