SI2433-F-FTR Equivalent & Substitute Parts

Part Overview

The SI2433-F-FTR is a 56k modem interface integrated circuit manufactured by Skyworks Solutions Inc., designed for system-side applications. This device supports multiple modem standards including V.21, V.22, V.23, V.32, V.34, V.90, Bell 103, and Bell 212A protocols. The SI2433-F-FTR is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and component procurement.

Substiute Parts

SI2433-F-FTR

Skyworks Solutions Inc.In Stock: 1065SI2433-F-FTR Datasheet

Current PartRFQ

SI2434-D-FTR

Skyworks Solutions Inc.In Stock: 740SI2434-D-FTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SI2433-F-FTR is determined by the following critical parameters:

Mechanical Compatibility:

• Identical package type: 24-TSSOP with 0.173" (4.40mm) width
• Surface mount mounting type
• Equivalent moisture sensitivity level (MSL 3)

Electrical Compatibility:

• Supply voltage range: 3V ~ 3.6V
• Manufacturer: Skyworks Solutions Inc. (same family)
• Series: ISOmodem™ platform

Protocol Support:

• Modem standard compatibility within the ISOmodem family
• Data format protocols supported by both devices

The SI2434-D-FTR qualifies as a substitute based on matching mechanical form factor, electrical specifications, and platform family, despite supporting a lower baud rate (33.6k versus 56k).

Parameter Comparison

Engineering Selection Recommendations

SI2433-F-FTR Status: The SI2433-F-FTR is classified as obsolete. New procurement of this part number is not available through standard distribution channels. Existing inventory of 1017 pieces is available from current stock.

SI2434-D-FTR as Active Alternative: The SI2434-D-FTR is an active product from Skyworks Solutions Inc. with 637 pieces in current inventory. This part maintains identical mechanical and electrical specifications (package, mounting, voltage supply, MSL rating) as the SI2433-F-FTR. The primary functional difference is the supported baud rate: 33.6k versus 56k.

Selection Criteria:

• For applications requiring 56k modem capability, the SI2433-F-FTR remains the specified part if existing stock is available
• For new designs or applications where 33.6k baud rate is acceptable, the SI2434-D-FTR provides an active, supported alternative with identical form factor and electrical interface
• Both parts are ROHS3 compliant and share the same MSL rating, ensuring equivalent handling and storage requirements

Frequently Asked Questions (FAQ)

Q: Can the SI2434-D-FTR directly replace the SI2433-F-FTR in existing designs?

A: The SI2434-D-FTR is mechanically and electrically compatible with the SI2433-F-FTR due to identical package type (24-TSSOP), mounting method (surface mount), and supply voltage (3V ~ 3.6V). However, the SI2434-D-FTR supports a maximum baud rate of 33.6k compared to 56k for the SI2433-F-FTR. Substitution is valid only if the application does not require 56k modem performance.

Q: What are the package compatibility considerations?

A: Both parts use the 24-TSSOP package with 0.173" (4.40mm) width. Pin count, pitch, and physical dimensions are identical, allowing direct PCB layout compatibility without redesign.

Q: Are there differences in handling and storage requirements?

A: Both parts have identical Moisture Sensitivity Level (MSL 3, 168 Hours), requiring equivalent handling, storage, and reflow procedures.

Q: Why is the SI2433-F-FTR listed as obsolete?

A: The SI2433-F-FTR is an obsolete product, indicating it is no longer manufactured or supported by Skyworks Solutions Inc. Existing inventory may be available from component distributors, but long-term availability is not guaranteed.

Q: What modem standards are supported by each part?

A: The SI2433-F-FTR supports V.21, V.22, V.23, V.32, V.34, V.90, Bell 103, and Bell 212A. The SI2434-D-FTR supports V.21, V.22, V.23, V.29, V.32, Bell 103, and Bell 212A. Both parts support common standards; however, the SI2433-F-FTR includes V.34 and V.90 support, while the SI2434-D-FTR includes V.29 support.