FSTU3384WMX Equivalent & Substitute Parts

Part Overview

The FSTU3384WMX is a bus switch IC manufactured by onsemi, configured as a 5 x 1:1 multiplexer in a 24-SOP package. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement. Bus switches of this configuration are used in signal routing and multiplexing applications where multiple input sources must be selectively connected to a single output path. The obsolete status of the FSTU3384WMX necessitates evaluation of functionally equivalent active alternatives to maintain design continuity and ensure long-term component availability.

Substiute Parts

FSTU3384WMX

onsemiIn Stock: 1185FSTU3384WMX Datasheet

Current PartRFQ

SN74CBT3384CDWR

Texas InstrumentsIn Stock: 3036SN74CBT3384CDWR Datasheet

SimilarRFQ

SN74CBTD3384CDW

Texas InstrumentsIn Stock: 947SN74CBTD3384CDW Datasheet

SimilarRFQ

SN74CBTD3384CDWR

Texas InstrumentsIn Stock: 5094SN74CBTD3384CDWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FSTU3384WMX is determined by the following critical parameters:

• Circuit Configuration: 5 x 1:1 multiplexer topology
• Independent Circuits: 2 circuits
• Voltage Supply Range: 4V ~ 5.5V (substitute must support this range)
• Operating Temperature: -40°C ~ 85°C
• Package: 24-SOIC form factor with 0.295" width and 7.50mm width specification
• Mounting: Surface mount technology

All identified substitute parts maintain these electrical and mechanical specifications. The substitutes are manufactured by Texas Instruments and carry active product status, providing improved long-term availability compared to the obsolete FSTU3384WMX.

Parameter Comparison

Engineering Selection Recommendations

All three Texas Instruments substitutes (SN74CBT3384CDWR, SN74CBTD3384CDW, SN74CBTD3384CDWR) are functionally equivalent to the FSTU3384WMX and maintain the required electrical and mechanical specifications. Selection among these alternatives should be based on:

Product Status: All substitute parts carry active product status, ensuring continued availability and manufacturing support.

Compliance: All substitutes are ROHS3 compliant, meeting current environmental and regulatory requirements.

Packaging Format: SN74CBT3384CDWR and SN74CBTD3384CDWR are supplied in Tape & Reel format, matching the original FSTU3384WMX packaging. SN74CBTD3384CDW is supplied in Tube format and may require different handling in automated assembly processes.

Voltage Supply Range: The substitute parts specify 4.5V ~ 5.5V, which is a subset of the original 4V ~ 5.5V range. Applications requiring operation below 4.5V require verification of actual circuit requirements before substitution.

Frequently Asked Questions (FAQ)

Q: Can SN74CBT3384CDWR directly replace FSTU3384WMX in existing designs?

A: Yes. Both parts share identical circuit configuration (5 x 1:1), independent circuit count (2), operating temperature range (-40°C ~ 85°C), and 24-SOIC package dimensions. The substitute is pin-compatible and functionally equivalent.

Q: What is the difference between SN74CBT3384CDWR and SN74CBTD3384CDWR?

A: Both parts are functionally equivalent with identical electrical specifications and package format (Tape & Reel). The primary difference is the series designation: 74CBT versus 74CBTD. Both are active products from Texas Instruments.

Q: Why does SN74CBTD3384CDW have different packaging?

A: SN74CBTD3384CDW is supplied in Tube packaging rather than Tape & Reel. The electrical and mechanical specifications remain identical. Tube packaging may affect automated assembly compatibility and handling procedures.

Q: Is the voltage supply range difference (4V ~ 5.5V vs. 4.5V ~ 5.5V) significant?

A: The substitute parts specify a minimum of 4.5V versus the original 4V minimum. If your application requires operation below 4.5V, verify actual circuit operating voltage before substitution.

Q: Are all substitutes RoHS compliant?

A: Yes. All three Texas Instruments substitutes are ROHS3 compliant, meeting current environmental regulations.