RE46C168SW16TF Equivalent & Substitute Parts

Part Overview

The RE46C168SW16TF 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 across a temperature range of -25°C to 75°C. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance, redesign, and production continuity.

Substiute Parts

RE46C168SW16TF

Microchip TechnologyIn Stock: 1011RE46C168SW16TF Datasheet

Current PartRFQ

RE46C145SW16TF

Microchip TechnologyIn Stock: 1127RE46C145SW16TF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RE46C168SW16TF is determined by strict alignment of the following critical parameters:

• Package Compatibility: Both parts must use the 16-SOIC (0.295", 7.50mm Width) surface mount package to ensure PCB layout and assembly process compatibility
• Functional Type: Both parts must be photoelectric smoke detector integrated circuits with voltage output
• Operating Temperature Range: Both parts must support the -25°C to 75°C operating window
• Regulatory Compliance: Both parts must maintain ROHS3 compliance and REACH unaffected status
• Moisture Sensitivity: Both parts must have MSL rating of 1 (Unlimited)

The RE46C145SW16TF meets all substitution criteria and is classified as an active product, providing long-term availability and supply chain stability compared to the obsolete RE46C168SW16TF.

Parameter Comparison

Engineering Selection Recommendations

The RE46C145SW16TF is the qualified substitute for the RE46C168SW16TF based on the following engineering criteria:

Package and Pinout Compatibility: Both components utilize the identical 16-SOIC (0.295", 7.50mm Width) surface mount package, ensuring direct PCB footprint compatibility without layout modifications.

Functional Equivalence: Both parts are photoelectric smoke detector integrated circuits with voltage output, maintaining identical input and output signal characteristics within the specified operating parameters.

Regulatory and Compliance Status: The RE46C145SW16TF maintains ROHS3 compliance and REACH unaffected status, matching the environmental and regulatory requirements of the original part. Both components have MSL rating of 1 (Unlimited), indicating identical moisture handling requirements.

Product Lifecycle Status: The RE46C145SW16TF is classified as an active product with confirmed inventory availability (1100 Pcs), providing superior supply chain continuity compared to the obsolete RE46C168SW16TF. This status ensures long-term sourcing reliability and technical support.

Supply Current Consideration: The RE46C145SW16TF operates at 4 µA supply current compared to 6 µA for the RE46C168SW16TF, representing a 33% reduction in power consumption. This parameter difference does not affect substitution eligibility but may provide system-level power efficiency benefits.

Frequently Asked Questions (FAQ)

Q: Can the RE46C145SW16TF be used as a direct replacement for the RE46C168SW16TF?

A: Yes. Both components share identical package specifications (16-SOIC), operating temperature range (-25°C to 75°C), and regulatory compliance status (ROHS3, REACH unaffected). The parts are functionally equivalent photoelectric smoke detector integrated circuits with voltage output.

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

A: The RE46C145SW16TF operates at 4 µA supply current, compared to 6 µA for the RE46C168SW16TF. This represents improved power efficiency in the substitute part. Both parts maintain identical electrical and mechanical specifications for substitution purposes.

Q: Why is the RE46C168SW16TF classified as obsolete?

A: The RE46C168SW16TF has reached end-of-life status in the manufacturer's product portfolio. The RE46C145SW16TF represents the active, supported alternative for new designs and ongoing production requirements.

Q: Are there any PCB layout changes required when substituting the RE46C145SW16TF?

A: No. Both parts use the identical 16-SOIC (0.295", 7.50mm Width) surface mount package. PCB footprints, assembly processes, and thermal management considerations remain unchanged.

Q: What is the MSL rating for both parts, and what does it mean?

A: Both the RE46C168SW16TF and RE46C145SW16TF have an MSL rating of 1 (Unlimited). This indicates the components have unlimited shelf life and require no special moisture control measures during storage or handling.

Q: Are both parts RoHS compliant?

A: Yes. Both the RE46C168SW16TF and RE46C145SW16TF are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.