RE46C167SW16F Equivalent & Substitute Parts

Part Overview

The RE46C167SW16F 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 6 µA supply current 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

RE46C167SW16F

Microchip TechnologyIn Stock: 838RE46C167SW16F Datasheet

Current PartRFQ

RE46C145SW16F

Microchip TechnologyIn Stock: 1001RE46C145SW16F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RE46C167SW16F is determined by 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
• Supply Current: Equivalent or lower current consumption
• Compliance Standards: ROHS3 compliance and REACH unaffected status

The RE46C145SW16F qualifies as a direct substitute based on matching package geometry, operating temperature range, functional classification, and regulatory compliance. The substitute part operates at 4 µA supply current, which is lower than the original specification, providing improved power efficiency while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The RE46C145SW16F is the qualified substitute for the RE46C167SW16F based on the following engineering criteria:

Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring compatibility with current environmental and safety standards.

Product Status: The RE46C145SW16F carries an active product status, whereas the RE46C167SW16F is obsolete. Selection of the active component ensures long-term availability and supply chain continuity.

Electrical Equivalence: The substitute part maintains identical functional classification as a photoelectric smoke detector with voltage output. The reduced supply current specification (4 µA versus 6 µA) represents an improvement in power efficiency without compromising functional performance.

Package Compatibility: Identical 16-SOIC package geometry ensures direct PCB footprint compatibility and eliminates layout redesign requirements.

Temperature Range: Matching operating temperature specifications (-25°C ~ 75°C) confirm thermal equivalence across all intended application environments.

Frequently Asked Questions (FAQ)

Q: Can the RE46C145SW16F be used as a direct replacement for the RE46C167SW16F in existing designs?

A: Yes. Both components share identical package geometry (16-SOIC), operating temperature range, functional type (photoelectric smoke detector), and output characteristics (voltage). The substitute part can be used in existing PCB layouts without modification.

Q: What is the significance of the lower supply current in the RE46C145SW16F?

A: The RE46C145SW16F operates at 4 µA compared to the RE46C167SW16F at 6 µA. This represents improved power efficiency and is compatible with designs specified for the original part, as lower current consumption does not create functional conflicts.

Q: Are there any compliance differences between these parts?

A: No. Both components are ROHS3 compliant and REACH unaffected, meeting identical regulatory requirements.

Q: Why is the RE46C167SW16F listed as obsolete?

A: Obsolete status indicates the part is no longer in active production. The RE46C145SW16F, with active product status, represents the current manufacturing equivalent and is recommended for new designs and ongoing procurement.

Q: Does the package designation "16-SOIC (0.295", 7.50mm Width)" guarantee mechanical interchangeability?

A: Yes. Identical package designations confirm matching lead pitch, body dimensions, and pin configuration, ensuring mechanical and electrical interchangeability on standard PCB layouts designed for 16-SOIC components.