RE46C166SW16F Equivalent & Substitute Parts

Part Overview

The RE46C166SW16F is a photoelectric smoke detector integrated circuit manufactured by Microchip Technology, designed for interface applications in smoke detection systems. This component features a 16-SOIC surface mount package and operates with a supply current of 6 µA across a temperature range of -25°C to 75°C. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations where legacy compatibility is not required.

Substiute Parts

RE46C166SW16F

Microchip TechnologyIn Stock: 866RE46C166SW16F Datasheet

Current PartRFQ

RE46C145SW16F

Microchip TechnologyIn Stock: 1001RE46C145SW16F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RE46C166SW16F is determined by strict equivalence across the following critical parameters:

• Package Compatibility: Both main and substitute parts must use the 16-SOIC (0.295", 7.50mm Width) surface mount package to ensure PCB layout and assembly process compatibility.
• Functional Classification: Both parts must be classified as photoelectric smoke detector integrated circuits with voltage output.
• Operating Temperature Range: The substitute must support the full -25°C to 75°C operating temperature specification.
• Electrical Interface: Both parts must provide voltage output and operate within compatible supply current specifications.
• Compliance Standards: RoHS3 compliance and MSL Level 1 rating must be maintained for manufacturing and storage compatibility.

The RE46C145SW16F qualifies as a direct substitute based on these parameters, with the additional benefit of active product status and improved supply current efficiency.

Parameter Comparison

Engineering Selection Recommendations

The RE46C145SW16F is the qualified substitute for the RE46C166SW16F based on functional and physical equivalence. Key selection factors include:

• Product Status: The RE46C145SW16F maintains active product status with Microchip Technology, ensuring continued availability and manufacturing support compared to the obsolete RE46C166SW16F.
• Package Equivalence: Both parts utilize identical 16-SOIC surface mount packaging, eliminating PCB redesign requirements.
• Compliance Alignment: Both parts maintain ROHS3 compliance and MSL Level 1 rating, satisfying manufacturing and environmental requirements.
• Supply Current Advantage: The RE46C145SW16F operates at 4 µA supply current versus 6 µA for the main part, providing improved power efficiency in battery-powered smoke detection applications.
• Temperature Range: Full operational equivalence across the -25°C to 75°C temperature specification.

Frequently Asked Questions (FAQ)

Q: Can the RE46C145SW16F be used as a direct replacement for the RE46C166SW16F?

A: Yes. Both parts share identical package specifications (16-SOIC), operating temperature range (-25°C to 75°C), photoelectric input type, voltage output configuration, and compliance certifications (ROHS3, MSL Level 1). The substitute offers improved supply current efficiency at 4 µA compared to 6 µA.

Q: What is the primary reason for substitution?

A: The RE46C166SW16F is classified as obsolete. The RE46C145SW16F provides functional equivalence with active product status, ensuring long-term availability and manufacturing support.

Q: Are there any package or mounting differences?

A: No. Both parts use the 16-SOIC (0.295", 7.50mm Width) surface mount package. No PCB layout modifications are required for substitution.

Q: How do the supply current specifications compare?

A: The RE46C145SW16F operates at 4 µA supply current, compared to 6 µA for the RE46C166SW16F. This represents a 33% reduction in power consumption, beneficial for battery-powered applications.

Q: Are compliance certifications equivalent?

A: Yes. Both parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) rating, satisfying manufacturing, storage, and environmental requirements.

Q: What is the inventory status for the substitute part?

A: The RE46C145SW16F has 911 pieces in stock as new original inventory, providing immediate availability for production requirements.