SI2404-C-FSR Equivalent & Substitute Parts

Part Overview

The SI2404-C-FSR is a 2.4k modem interface IC manufactured by Skyworks Solutions Inc., designed for system-side DAA (Data Access Arrangement) applications. It supports multiple modem standards including V.21, V.22, V.23, V.29, Bell 103, and Bell 212A protocols in a 16-SOIC surface mount package. The part is currently marked as Not For New Designs, which necessitates identification of active equivalent alternatives for ongoing production and new design implementations.

Substiute Parts

SI2404-C-FSR

Skyworks Solutions Inc.In Stock: 2885SI2404-C-FSR Datasheet

Current PartRFQ

SI2404-D-FSR

Skyworks Solutions Inc.In Stock: 3659SI2404-D-FSR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SI2404-D-FSR qualifies as a direct substitute for the SI2404-C-FSR based on the following matching parameters:

• Identical modem protocol support (V.21, V.22, V.23, V.29, Bell 103, Bell 212A)
• Identical baud rate specification (2.4k)
• Identical supply voltage range (3V ~ 3.6V)
• Identical package configuration (16-SOIC, 0.154" width, 3.90mm)
• Identical mounting type (Surface Mount)
• Identical moisture sensitivity level (MSL 3, 168 Hours)
• Identical base product number (SI2404)
• Identical regulatory classifications (ECCN EAR99, HTSUS 8542.39.0001)

The primary distinction is product status: SI2404-D-FSR is Active, whereas SI2404-C-FSR is Not For New Designs.

Parameter Comparison

Engineering Selection Recommendations

The SI2404-D-FSR is the appropriate selection for new designs and ongoing production applications. This part maintains full electrical and mechanical compatibility with the SI2404-C-FSR while offering Active product status from the manufacturer. The SI2404-D-FSR carries identical regulatory compliance certifications (ECCN EAR99, HTSUS 8542.39.0001) and equivalent inventory availability. For applications currently using SI2404-C-FSR, transition to SI2404-D-FSR is supported by identical package geometry, pin configuration, and functional specifications.

Frequently Asked Questions (FAQ)

Q: Can SI2404-D-FSR be used as a direct replacement for SI2404-C-FSR in existing designs?

A: Yes. Both parts share identical electrical specifications (supply voltage, data formats, baud rates), package configuration (16-SOIC), and mounting type (Surface Mount). No circuit modifications are required.

Q: What is the significance of the product status difference?

A: SI2404-C-FSR is marked Not For New Designs, indicating the manufacturer is transitioning away from this variant. SI2404-D-FSR is Active, meaning it receives ongoing manufacturer support and is recommended for new applications.

Q: Are the pin configurations identical between these parts?

A: Both parts use the 16-SOIC package with identical base product number (SI2404), confirming pin-for-pin compatibility.

Q: Do both parts meet the same moisture sensitivity requirements?

A: Yes. Both parts carry MSL 3 rating (168 Hours), requiring identical handling and storage protocols.

Q: Are there any supply chain or availability differences?

A: SI2404-D-FSR currently shows higher inventory availability (3580 Pcs vs. 2874 Pcs), though both are listed as New Original In Stock.