RE46C168SW16F Equivalent & Substitute Parts

Part Overview

The RE46C168SW16F 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 product status, necessitating identification of active equivalent parts for ongoing design requirements and production continuity. The device operates with a supply current of 6 µA across an operating temperature range of -25°C to 75°C and is ROHS3 compliant with unlimited moisture sensitivity rating.

Substiute Parts

RE46C168SW16F

Microchip TechnologyIn Stock: 834RE46C168SW16F Datasheet

Current PartRFQ

RE46C145SW16F

Microchip TechnologyIn Stock: 1001RE46C145SW16F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RE46C168SW16F is determined by strict alignment of the following critical parameters:

• Photoelectric input type for smoke detection functionality
• Voltage output type for signal compatibility
• 16-SOIC surface mount package for PCB layout compatibility
• Operating temperature range of -25°C to 75°C or wider
• ROHS3 compliance and unlimited MSL rating for regulatory and manufacturing consistency

The RE46C145SW16F qualifies as a direct substitute based on matching all critical parameters. While the RE46C145SW16F operates at 4 µA supply current (lower than the 6 µA of the RE46C168SW16F), this represents an improvement in power efficiency and does not restrict substitution in applications designed for the original part's specifications.

Parameter Comparison

Engineering Selection Recommendations

The RE46C145SW16F is the qualified substitute for the obsolete RE46C168SW16F. Selection of the RE46C145SW16F is supported by:

• Active product status, ensuring long-term availability and manufacturing support
• Identical package, pinout, and functional classification as the original part
• Matching compliance certifications (ROHS3, unlimited MSL)
• Equivalent operating temperature range
• Reduced supply current specification, which provides operational margin in power-constrained applications

No additional design modifications are required for direct substitution in existing RE46C168SW16F applications.

Frequently Asked Questions (FAQ)

Q: Can the RE46C145SW16F be used as a direct replacement for the RE46C168SW16F?

A: Yes. Both parts share identical package geometry (16-SOIC), photoelectric input type, voltage output type, and operating temperature range. The RE46C145SW16F is the manufacturer-recommended substitute and is currently in active production status.

Q: What is the difference in supply current between these parts?

A: The RE46C168SW16F operates at 6 µA, while the RE46C145SW16F operates at 4 µA. The lower current consumption of the substitute part does not restrict its use in applications designed for the original specification.

Q: Are there any package or pinout differences?

A: No. Both parts use the 16-SOIC (0.295", 7.50mm Width) surface mount package with identical pin configuration.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the RE46C168SW16F and RE46C145SW16F are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1) ratings.

Q: Why is the RE46C168SW16F listed as obsolete?

A: The RE46C168SW16F has been discontinued by Microchip Technology. The RE46C145SW16F is the active equivalent part recommended for new designs and production continuity.