PCA9554ADB,112 Equivalent & Substitute Parts

Part Overview

The PCA9554ADB,112 is an 8-bit I/O Expander designed for I2C and SMBus communication at 400 kHz, manufactured by NXP USA Inc. in a 16-SSOP surface mount package. This component provides push-pull output capability with interrupt functionality and power-on reset (POR) features, operating across a 2.3V to 5.5V supply range.

The PCA9554ADB,112 is classified as Obsolete. Equivalent substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and system upgrades.

Substiute Parts

PCA9554ADB,112

NXP USA Inc.In Stock: 726PCA9554ADB,112 Datasheet

Current PartRFQ

PCA9554DB

Texas InstrumentsIn Stock: 2185PCA9554DB Datasheet

MFR RecommendedRFQ

PCA9554DBR

Texas InstrumentsIn Stock: 3872PCA9554DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCA9554ADB,112 are qualified based on electrical and mechanical parameter equivalence. The following criteria determine substitutability:

• Functional Equivalence: 8-bit I/O count, I2C/SMBus interface, 400 kHz clock frequency
• Electrical Compatibility: Identical supply voltage range (2.3V ~ 5.5V), output current specifications (10mA, 25mA), and operating temperature range (-40°C ~ 85°C)
• Package Compatibility: 16-SSOP surface mount package with identical physical dimensions (0.209", 5.30mm Width)
• Feature Parity: Push-pull output type, interrupt output capability, and power-on reset functionality
• Compliance Alignment: ROHS3 compliance and MSL Level 1 rating

The qualified substitute parts are:

• PCA9554DB (Texas Instruments) — Tube packaging
• PCA9554DBR (Texas Instruments) — Tape & Reel packaging

Parameter Comparison

Engineering Selection Recommendations

Both PCA9554DB and PCA9554DBR are direct functional and electrical equivalents to the PCA9554ADB,112. Selection between these substitutes depends on packaging and procurement requirements:

• PCA9554DB (Tube Packaging): Suitable for lower-volume applications and manual assembly processes. Product status is Last Time Buy, indicating limited future availability.

• PCA9554DBR (Tape & Reel Packaging): Optimized for high-volume automated assembly and pick-and-place operations. Product status is Obsolete, consistent with the original part.

Both substitutes maintain full ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols. Inventory availability should be verified at the time of procurement, as both parts carry end-of-life designations.

Frequently Asked Questions (FAQ)

Q: Can PCA9554DB and PCA9554DBR be used interchangeably with PCA9554ADB,112?

A: Yes. Both parts are electrically and mechanically equivalent. The difference is packaging format: PCA9554DB uses tube packaging, while PCA9554DBR uses tape & reel. The choice depends on assembly method and volume requirements.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging is suitable for manual handling and lower-volume applications. Tape & reel packaging is designed for automated pick-and-place assembly equipment and high-volume production. Both formats contain the same component.

Q: Are there any differences in electrical performance between the NXP and Texas Instruments versions?

A: No. All three parts (PCA9554ADB,112, PCA9554DB, and PCA9554DBR) share identical electrical specifications, including supply voltage, output current, clock frequency, and operating temperature range.

Q: Why is the original PCA9554ADB,112 marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Substitute parts ensure continued availability for maintenance, repair, and new production requirements.

Q: Are these parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant and carry MSL Level 1 rating, meeting standard environmental and reliability requirements for industrial and commercial applications.

Q: Can I mix packaging formats in the same production run?

A: Yes, provided your assembly process can accommodate both tube and tape & reel formats. However, standardizing on a single packaging format is recommended for supply chain consistency.