RE46C165SW16F Equivalent & Substitute Parts

Part Overview

The RE46C165SW16F is a photoelectric smoke detector integrated circuit manufactured by Microchip Technology, classified as an Interface IC in the 16-SOIC surface mount package. This component is designated as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The part operates with a 6 µA supply current and functions across the -25°C to 75°C temperature range, serving as the detection element in smoke alarm applications.

Substiute Parts

RE46C165SW16F

Microchip TechnologyIn Stock: 1142RE46C165SW16F Datasheet

Current PartRFQ

RE46C145SW16F

Microchip TechnologyIn Stock: 1001RE46C145SW16F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RE46C165SW16F is determined by strict alignment across the following critical parameters:

• Functional Type: Smoke detector with photoelectric input and voltage output
• Package Compatibility: 16-SOIC surface mount package (0.295", 7.50mm Width)
• Operating Temperature Range: -25°C ~ 75°C
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected status
• Moisture Sensitivity Level: MSL 1 (Unlimited)

The RE46C145SW16F qualifies as a direct substitute based on these parameters. While the substitute exhibits a lower supply current specification (4 µA versus 6 µA), both parts maintain identical package geometry, temperature operating range, and regulatory compliance status, enabling functional equivalence in photoelectric smoke detection applications.

Parameter Comparison

Engineering Selection Recommendations

The RE46C145SW16F is the qualified substitute for the obsolete RE46C165SW16F. Both components are manufactured by Microchip Technology and maintain identical package specifications, temperature operating ranges, and regulatory compliance certifications. The substitute part carries Active product status, ensuring continued availability and manufacturing support.

The primary distinction between the parts is the supply current specification: the substitute operates at 4 µA compared to the main part's 6 µA. This reduced current consumption in the substitute represents an improvement in power efficiency without compromising functional equivalence in photoelectric smoke detection circuits.

Both parts satisfy ROHS3 compliance and REACH unaffected requirements, supporting deployment in regulated applications. The MSL 1 rating for both components indicates unlimited shelf life under standard storage conditions.

Frequently Asked Questions (FAQ)

Q: Can the RE46C145SW16F directly replace the RE46C165SW16F in existing designs?

A: Yes. Both parts share identical package geometry (16-SOIC), operating temperature range (-25°C ~ 75°C), and regulatory compliance status. The substitute is functionally equivalent for photoelectric smoke detection applications.

Q: What is the significance of the lower supply current in the substitute part?

A: The RE46C145SW16F operates at 4 µA supply current versus 6 µA for the main part. This represents improved power efficiency and is not a limitation for substitution. The lower current consumption may provide benefits in battery-powered or low-power applications.

Q: Are there any package or mounting differences between these parts?

A: No. Both parts use the 16-SOIC surface mount package with identical 0.295" (7.50mm) width specifications. PCB layout and assembly processes require no modification.

Q: What is the product status difference, and does it affect substitution?

A: The main part (RE46C165SW16F) is obsolete, while the substitute (RE46C145SW16F) is active. The active status of the substitute ensures ongoing manufacturing availability and supply chain continuity.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, satisfying identical regulatory compliance requirements for deployment in regulated markets.