PCA9554DB,118 Equivalent & Substitute Parts

Part Overview

The PCA9554DB,118 is an 8-bit I/O expander interface circuit manufactured by NXP USA Inc., designed for I2C and SMBus communication at 400 kHz. This device provides push-pull output capability with configurable interrupt functionality and power-on reset (POR) features. The part is currently in active production status with 2744 units in stock.

Substitute parts become necessary when the primary part reaches end-of-life status, experiences supply constraints, or when alternative packaging formats are required for manufacturing optimization. The PCA9554DB,118 has documented equivalents that maintain identical electrical and mechanical specifications while offering different product lifecycle statuses and packaging options.

Substiute Parts

PCA9554DB,118

NXP USA Inc.In Stock: 2804PCA9554DB,118 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

Substitution eligibility for the PCA9554DB,118 is determined by strict equivalence across the following critical parameters:

• I/O Configuration: 8-bit I/O expander architecture
• Communication Protocol: I2C and SMBus compatibility at 400 kHz
• Electrical Characteristics: Push-pull output with 10mA/25mA source/sink capability
• Supply Voltage: 2.3V to 5.5V operating range
• Temperature Range: -40°C to 85°C operational limits
• Package Specification: 16-SSOP surface mount package with identical physical dimensions
• Compliance: ROHS3 compliance and MSL Level 1 rating

The identified substitute parts maintain these specifications while differing in manufacturer source, product lifecycle status, and packaging format (Tube vs. Tape & Reel).

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: PCA9554DB,118 (NXP USA Inc.) remains the preferred choice due to active product status and continuous manufacturing availability.

Secondary Selection: PCA9554DB (Texas Instruments) in Tube packaging is suitable for applications where packaging format flexibility is acceptable. This part carries Last Time Buy status, indicating limited future availability.

Tertiary Selection: PCA9554DBR (Texas Instruments) in Tape & Reel format maintains identical electrical and mechanical specifications but is classified as Obsolete. Selection of this part should be limited to applications with existing inventory requirements or where supply chain alternatives are exhausted.

All three parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard surface mount assembly processes and long-term storage without moisture sensitivity constraints.

Frequently Asked Questions (FAQ)

Q: Can PCA9554DB (Texas Instruments, Tube) be used as a direct replacement for PCA9554DB,118 (NXP, Tape & Reel)?

A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format: Tube versus Tape & Reel. Tube packaging is suitable for manual assembly or lower-volume production runs, while Tape & Reel is optimized for automated pick-and-place assembly. Verify your assembly equipment compatibility before selection.

Q: Why is PCA9554DBR (Texas Instruments) marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. While existing inventory is available (3845 units), future procurement cannot be guaranteed. Use this part only when current stock is sufficient for project requirements or as a temporary solution pending transition to active alternatives.

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

A: No. Both manufacturers provide identical specifications for I/O count, interface protocol, clock frequency, output characteristics, supply voltage range, operating temperature, and interrupt functionality. All parts are pin-compatible and functionally equivalent.

Q: What is the significance of the ",118" suffix in PCA9554DB,118?

A: The ",118" suffix indicates a specific packaging or date code variant assigned by the supplier. The base part number PCA9554DB defines the core electrical and mechanical specifications. Substitutes with identical base part numbers maintain full compatibility.

Q: Can I mix manufacturers in the same assembly?

A: Yes. Since all parts meet identical electrical and mechanical specifications, ROHS3 compliance, and MSL Level 1 requirements, they can be used interchangeably within the same design. Verify your quality assurance and traceability requirements before implementing mixed-manufacturer designs.

Q: What should I consider when transitioning from PCA9554DBR (Obsolete) to an active alternative?

A: Verify current inventory levels of PCA9554DB,118 (NXP, Active) or PCA9554DB (Texas Instruments, Last Time Buy). Both maintain identical pin configuration and electrical performance. Plan procurement timelines to avoid supply gaps, particularly for PCA9554DB (Texas Instruments) due to Last Time Buy status.