SI2404-C-FS Equivalent & Substitute Parts

Part Overview

The SI2404-C-FS is a 2.4k modem interface IC manufactured by Skyworks Solutions Inc., designed for system-side applications supporting V.21, V.22, V.23, V.29, Bell 103, and Bell 212A data formats. The device is packaged in a 16-SOIC surface mount configuration with a 3V to 3.6V supply voltage range.

The SI2404-C-FS carries a "Not For New Designs" product status, indicating that Skyworks Solutions Inc. has discontinued active development and support for this component. Identifying equivalent substitute parts is necessary for ongoing maintenance, repair, and legacy system support where continued component availability is required.

Substiute Parts

SI2404-C-FS

Skyworks Solutions Inc.In Stock: 909SI2404-C-FS Datasheet

Current PartRFQ

SI2404-D-FS

Skyworks Solutions Inc.In Stock: 69851SI2404-D-FS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SI2404-C-FS is determined by strict alignment of the following electrical and mechanical parameters:

• Data format compatibility: V.21, V.22, V.23, V.29, Bell 103, Bell 212A
• Baud rate: 2.4k
• Supply voltage range: 3V ~ 3.6V
• Package configuration: 16-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• Series designation: ISOmodem®

The SI2404-D-FS meets all substitution criteria, maintaining identical electrical specifications, data format support, baud rate, supply voltage, and physical package dimensions. The primary distinction is product status: SI2404-D-FS is Active, whereas SI2404-C-FS is Not For New Designs.

Parameter Comparison

Engineering Selection Recommendations

The SI2404-D-FS is the direct substitute for SI2404-C-FS applications. Both components share identical electrical and mechanical specifications, ensuring pin-for-pin compatibility and functional equivalence in 16-SOIC surface mount configurations.

The SI2404-D-FS offers the advantage of Active product status with confirmed RoHS3 compliance and REACH unaffected designation, providing regulatory clarity for systems requiring environmental and hazardous substance compliance documentation. The SI2404-C-FS, classified as Not For New Designs, lacks published compliance certifications in the provided data.

For legacy system maintenance and repair applications, SI2404-D-FS availability (69,800 pcs in stock) exceeds SI2404-C-FS availability (853 pcs in stock), supporting long-term component sourcing requirements.

Frequently Asked Questions (FAQ)

Q: Can SI2404-D-FS replace SI2404-C-FS in existing designs?

A: Yes. Both components are electrically and mechanically identical, supporting the same data formats (V.21, V.22, V.23, V.29, Bell 103, Bell 212A), baud rate (2.4k), supply voltage (3V ~ 3.6V), and 16-SOIC package configuration. Pin-for-pin substitution is valid.

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

A: SI2404-C-FS is classified as Not For New Designs, indicating discontinued active development. SI2404-D-FS is Active, meaning Skyworks Solutions Inc. continues to support and manufacture this variant. For ongoing production and maintenance, SI2404-D-FS is the recommended choice.

Q: Are there compliance differences between the two parts?

A: SI2404-D-FS is documented as ROHS3 Compliant and REACH Unaffected. SI2404-C-FS compliance certifications are not specified in available data. For applications requiring regulatory compliance documentation, SI2404-D-FS provides explicit certification.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both SI2404-C-FS and SI2404-D-FS carry MSL 3 (168 Hours) moisture sensitivity level, requiring identical handling and storage protocols.

Q: Is the 16-SOIC package identical for both parts?

A: Yes. Both components use the same 16-SOIC package with 0.154" width (3.90mm), ensuring mechanical compatibility in PCB layouts and assembly processes.