74VCX245WMX Equivalent & Substitute Parts

Part Overview

The 74VCX245WMX is a non-inverting transceiver IC manufactured by onsemi, designed for 8-bit data bus switching applications with 3-state output capability. This device operates across a supply voltage range of 1.4V to 3.6V and is housed in a 20-SOIC package. The 74VCX245WMX is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional equivalence in transceiver topology, bit width, output configuration, and package form factor while meeting current product availability and compliance standards.

Substiute Parts

74VCX245WMX

onsemiIn Stock: 99974VCX245WMX Datasheet

Current PartRFQ

74ALVC245D,118

NXP USA Inc.In Stock: 911874ALVC245D,118 Datasheet

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SN74ALVC245DW

Texas InstrumentsIn Stock: 1592SN74ALVC245DW Datasheet

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SN74ALVC245DWR

Texas InstrumentsIn Stock: 2309SN74ALVC245DWR Datasheet

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SN74ALVC245NS

Texas InstrumentsIn Stock: 974SN74ALVC245NS Datasheet

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SN74ALVC245NSR

Texas InstrumentsIn Stock: 2574SN74ALVC245NSR Datasheet

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SN74ALVCH245DW

Texas InstrumentsIn Stock: 1324SN74ALVCH245DW Datasheet

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SN74ALVCH245DWR

Texas InstrumentsIn Stock: 2922SN74ALVCH245DWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following parameters:

Core Functional Parameters (Must Match):

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 24mA, 24mA
• Operating Temperature: -40°C ~ 85°C (TA)

Electrical Compatibility Parameters (Must Be Compatible):

• Voltage - Supply: Substitute must support the 1.4V ~ 3.6V range or a subset thereof that includes the operating range of the original design
• Mounting Type: Surface Mount (required)

Package Considerations:

• Primary substitutes maintain the 20-SOIC (0.295", 7.50mm Width) package for direct PCB compatibility
• Secondary substitutes in 20-SO (0.209", 5.30mm Width) package are functionally equivalent but require PCB layout verification due to different physical dimensions

All substitute parts listed are active products from established manufacturers (Texas Instruments, NXP USA Inc.) with current production status and RoHS3 compliance, ensuring long-term availability and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct PCB Compatibility):

SN74ALVC245DW, SN74ALVC245DWR, SN74ALVCH245DW, and SN74ALVCH245DWR are recommended as primary substitutes. These parts maintain the 20-SOIC (0.295", 7.50mm Width) package footprint, enabling direct PCB replacement without layout modifications. All are manufactured by Texas Instruments with active product status and ROHS3 compliance. The SN74ALVC245 series (74ALVC base product number) and SN74ALVCH245 series (74ALVCH base product number) both meet all functional and electrical requirements. Packaging variants (DW for Tube, DWR for Tape & Reel) differ only in supply format and do not affect electrical performance.

Secondary Substitutes (Package Variant):

SN74ALVC245NS and SN74ALVC245NSR utilize the 20-SO (0.209", 5.30mm Width) package, which differs physically from the original 20-SOIC package. These parts are functionally equivalent and maintain active product status with ROHS3 compliance. Selection of these variants requires PCB layout verification to confirm footprint compatibility with existing designs.

Alternative Substitute (Different Manufacturer):

74ALVC245D,118 manufactured by NXP USA Inc. is functionally equivalent and maintains the 20-SO package form factor. This part is active and available but does not specify RoHS compliance status in the provided data. The 20-SO package requires the same PCB layout consideration as the Texas Instruments 20-SO variants.

Voltage Supply Consideration:

All substitute parts operate within the 1.65V ~ 3.6V supply range, which is compatible with designs operating at 1.65V and above. Designs requiring operation below 1.65V (down to 1.4V as supported by the original 74VCX245WMX) cannot use these substitutes without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can SN74ALVC245DW directly replace 74VCX245WMX on the PCB?

A: Yes. Both parts use the 20-SOIC (0.295", 7.50mm Width) package, enabling direct PCB replacement without layout modifications. Electrical parameters are compatible for designs operating at 1.65V supply voltage or higher.

Q: What is the difference between SN74ALVC245DW and SN74ALVC245DWR?

A: Both parts are electrically identical. The difference is packaging format: DW is supplied in Tube, while DWR is supplied in Tape & Reel (TR). Selection depends on assembly process requirements and inventory management preferences.

Q: Can I use SN74ALVC245NS as a substitute?

A: SN74ALVC245NS is functionally equivalent but uses a different package: 20-SO (0.209", 5.30mm Width) versus the original 20-SOIC (0.295", 7.50mm Width). PCB layout verification is required to confirm footprint compatibility before use.

Q: What is the minimum supply voltage for substitute parts?

A: All listed substitutes operate at a minimum of 1.65V. The original 74VCX245WMX supports operation down to 1.4V. If your design requires operation below 1.65V, these substitutes are not compatible without circuit modification.

Q: Are all substitute parts RoHS compliant?

A: All Texas Instruments substitutes (SN74ALVC245 and SN74ALVCH245 series) are ROHS3 compliant. The NXP 74ALVC245D,118 does not specify RoHS compliance status in available data. Verify compliance requirements with your supply chain or regulatory documentation.

Q: What is the difference between 74ALVC and 74ALVCH series?

A: Both series are non-inverting transceivers with identical functional specifications, output current ratings, and package options. The 74ALVCH designation indicates an enhanced variant. Both are suitable substitutes based on the provided electrical parameters.

Q: Why is the 74VCX245WMX marked as obsolete?

A: The 74VCX245WMX is no longer in active production. The 74ALVC and 74ALVCH series represent current-generation equivalents that maintain functional compatibility while offering improved availability and compliance certifications.