FSTU3384WM Equivalent & Substitute Parts

Part Overview

The FSTU3384WM is a bus switch IC manufactured by onsemi, featuring a 5 x 1:1 circuit configuration in a 24-SOP package. This component functions as a logic-level bus switch for signal routing and multiplexing applications. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and component procurement.

Substiute Parts

FSTU3384WM

onsemiIn Stock: 794FSTU3384WM Datasheet

Current PartRFQ

SN74CBT3384CDWR

Texas InstrumentsIn Stock: 3036SN74CBT3384CDWR Datasheet

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SN74CBTD3384CDW

Texas InstrumentsIn Stock: 947SN74CBTD3384CDW Datasheet

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SN74CBTD3384CDWR

Texas InstrumentsIn Stock: 5094SN74CBTD3384CDWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FSTU3384WM is determined by the following critical parameters:

• Circuit Configuration: Must be 5 x 1:1 bus switch topology
• Independent Circuits: Must equal 2
• Package / Case: Must be 24-SOIC (0.295", 7.50mm Width)
• Voltage Supply Range: Must support 4V ~ 5.5V operation
• Operating Temperature: Must cover -40°C ~ 85°C
• Mounting Type: Must be Surface Mount
• Moisture Sensitivity Level: Must be MSL 1 or equivalent

All three substitute parts listed below meet these criteria and are therefore electrically and mechanically compatible with the FSTU3384WM.

Parameter Comparison

Engineering Selection Recommendations

All three Texas Instruments substitute parts are active products with ROHS3 compliance certification, providing long-term availability and regulatory alignment. The FSTU3384WM, being obsolete, should be replaced with one of these alternatives for new designs or ongoing production support.

Selection between the three Texas Instruments options depends on packaging requirements:

• SN74CBT3384CDWR: Tape & Reel packaging, suitable for high-volume automated assembly
• SN74CBTD3384CDW: Tube packaging, suitable for lower-volume or manual assembly operations
• SN74CBTD3384CDWR: Tape & Reel packaging with 74CBTD series designation

All three parts share identical electrical specifications and are pin-compatible with the FSTU3384WM within the specified voltage and temperature operating ranges.

Frequently Asked Questions (FAQ)

Q: Can SN74CBT3384CDWR be used as a direct replacement for FSTU3384WM?

A: Yes. Both parts feature identical 5 x 1:1 bus switch configuration, 2 independent circuits, 24-SOIC package, and support the -40°C ~ 85°C operating temperature range. The voltage supply range for SN74CBT3384CDWR (4.5V ~ 5.5V) is a subset of the FSTU3384WM range (4V ~ 5.5V), making it compatible for applications operating at 4.5V or higher.

Q: What is the difference between SN74CBT3384CDWR and SN74CBTD3384CDWR?

A: Both parts are functionally equivalent with identical electrical specifications. The primary difference is the series designation (74CBT versus 74CBTD) and packaging format. SN74CBT3384CDWR uses Tape & Reel packaging, while SN74CBTD3384CDWR also uses Tape & Reel but belongs to the 74CBTD series. Consult Texas Instruments datasheets for any series-specific performance characteristics.

Q: Is the 24-SOIC package footprint identical across all substitute parts?

A: Yes. All parts use the 24-SOIC (0.295", 7.50mm Width) package, ensuring identical PCB footprint and mounting compatibility.

Q: Are there voltage supply considerations when substituting?

A: The FSTU3384WM supports 4V ~ 5.5V operation. The Texas Instruments substitutes support 4.5V ~ 5.5V. For applications operating below 4.5V, the FSTU3384WM specifications must be verified against design requirements before substitution.

Q: What packaging option should be selected for production?

A: SN74CBT3384CDWR and SN74CBTD3384CDWR (Tape & Reel) are recommended for automated assembly lines. SN74CBTD3384CDW (Tube) is suitable for manual assembly or lower-volume applications.