PCA8550D,118 Equivalent & Substitute Parts

Part Overview

The PCA8550D,118 is a 1 x 4:4 multiplexer logic IC manufactured by NXP USA Inc., designed for single supply operation in the 3V to 3.6V range. This component is classified as obsolete, which necessitates identification of active equivalent parts to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Substiute Parts

PCA8550D,118

NXP USA Inc.In Stock: 931PCA8550D,118 Datasheet

Current PartRFQ

PCA8550PW,118

NXP USA Inc.In Stock: 11630PCA8550PW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA8550D,118 is based on the following critical parameters that must remain constant across equivalent parts:

• Base product number: PCA8550
• Circuit configuration: 1 x 4:4 multiplexer topology
• Independent circuits: 1
• Output current specifications: 2mA high, 2mA low
• Supply voltage range: 3V ~ 3.6V
• Operating temperature range: 0°C ~ 70°C
• Mounting type: Surface Mount
• RoHS3 compliance and MSL Level 1 rating

The PCA8550PW,118 qualifies as a direct substitute based on identical electrical specifications and functional characteristics. The primary difference is the package format: the substitute uses 16-TSSOP (Thin Shrink Small Outline Package) instead of 16-SOIC, with a slightly wider body (4.40mm vs. 3.90mm). Both packages are surface-mount compatible and maintain the same pin count and electrical performance.

Parameter Comparison

Engineering Selection Recommendations

The PCA8550PW,118 is the recommended substitute for the obsolete PCA8550D,118. Both parts share identical electrical specifications, functional performance, and regulatory compliance status (ROHS3 Compliant, MSL Level 1). The substitute part maintains active product status with NXP USA Inc., ensuring continued availability and supply chain reliability.

The primary design consideration is the package transition from 16-SOIC to 16-TSSOP. This requires PCB layout modification to accommodate the different package footprint dimensions (body width increases from 3.90mm to 4.40mm). Pin configuration and electrical characteristics remain unchanged, allowing direct functional replacement once the PCB layout is updated.

Frequently Asked Questions (FAQ)

Q: Are the PCA8550D,118 and PCA8550PW,118 electrically identical?

A: Yes. Both parts share identical electrical specifications including output current (2mA high/low), supply voltage range (3V ~ 3.6V), operating temperature (0°C ~ 70°C), and circuit configuration (1 x 4:4 multiplexer). Functional performance is equivalent.

Q: What is the main difference between these two parts?

A: The primary difference is the package format. The PCA8550D,118 uses 16-SOIC packaging (3.90mm body width), while the PCA8550PW,118 uses 16-TSSOP packaging (4.40mm body width). Both are surface-mount packages with identical pin counts and electrical performance.

Q: Can I use PCA8550PW,118 as a direct drop-in replacement?

A: The parts are electrically compatible, but PCB layout modification is required due to different package footprints. The TSSOP package has a wider body dimension, necessitating updated PCB land patterns and routing.

Q: Why is the PCA8550D,118 obsolete?

A: Product obsolescence is determined by the manufacturer. The active equivalent PCA8550PW,118 provides continued access to the same multiplexer functionality with improved supply chain availability.

Q: Are both parts RoHS compliant?

A: Yes. Both the PCA8550D,118 and PCA8550PW,118 are ROHS3 Compliant with MSL Level 1 (Unlimited) moisture sensitivity rating.