74AC245SCX Equivalent & Substitute Parts

Part Overview

The 74AC245SCX is a non-inverting transceiver logic IC manufactured by onsemi, designed for 8-bit bidirectional data transfer with 3-state output capability. This device operates across a 2V to 6V supply voltage range and is housed in a 20-SOIC package. The part is currently active in production with ROHS3 compliance and MSL-3 moisture sensitivity rating. Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support alternative packaging or operational requirements while maintaining functional compatibility.

Substiute Parts

74AC245SCX

onsemiIn Stock: 328274AC245SCX Datasheet

Current PartRFQ

MC74AC245DWR2G

onsemiIn Stock: 4763MC74AC245DWR2G Datasheet

DirectRFQ

MC74AC245DWG

onsemiIn Stock: 2190MC74AC245DWG Datasheet

SimilarRFQ

CD74AC245M96

Texas InstrumentsIn Stock: 5308CD74AC245M96 Datasheet

DirectRFQ

SN74AC245DW

Texas InstrumentsIn Stock: 2384SN74AC245DW Datasheet

DirectRFQ

SN74AC245DWR

Texas InstrumentsIn Stock: 3285SN74AC245DWR Datasheet

DirectRFQ

CD74AC245M

Harris CorporationIn Stock: 2009CD74AC245M Datasheet

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SN74AC245NSR

Texas InstrumentsIn Stock: 7303SN74AC245NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74AC245SCX are classified based on the following substitution criteria:

Direct Substitutes maintain identical electrical specifications, package dimensions, and operational parameters. These parts are interchangeable without circuit modification:

• Voltage supply range: 2V ~ 6V
• Output current: 24mA, 24mA
• Operating temperature: -40°C ~ 85°C
• Package: 20-SOIC (0.295", 7.50mm Width)
• Logic configuration: Transceiver, Non-Inverting, 1 Element, 8 Bit per Element, 3-State Output

Similar Substitutes share the same logic function and package footprint but differ in one or more parameters such as voltage range, temperature rating, packaging format, or moisture sensitivity level. These require design verification for specific application constraints.

Packaging Variants maintain electrical compatibility but differ in supplier packaging format (Cut Tape & Digi-Reel vs. Tube vs. Tape & Reel), affecting procurement and handling procedures without impacting circuit performance.

Parameter Comparison

Engineering Selection Recommendations

Preferred Direct Substitutes:

MC74AC245DWR2G and SN74AC245DWR are the primary alternatives to 74AC245SCX. Both maintain identical electrical specifications (2V ~ 6V supply, -40°C ~ 85°C operating range, 24mA output current) and package footprint (20-SOIC 0.295" width). MC74AC245DWR2G is onsemi-sourced with matching MSL-3 rating, while SN74AC245DWR is Texas Instruments-sourced with MSL-1 (lower moisture sensitivity). Both are active products with ROHS3 compliance and Cut Tape & Digi-Reel packaging.

Packaging Variant:

MC74AC245DWG provides identical electrical and mechanical compatibility but is supplied in Tube packaging instead of Cut Tape & Digi-Reel format. This variant is suitable for applications where tube packaging meets procurement specifications.

Extended Operating Range Alternative:

CD74AC245M96 (Texas Instruments) offers expanded operating temperature range (-55°C ~ 125°C) and lower voltage floor (1.5V minimum vs. 2V), with superior moisture sensitivity (MSL-1). This part is suitable for applications requiring extended environmental performance. Tape & Reel packaging is standard for this variant.

Parts to Avoid:

SN74AC245DW is discontinued at DiGi Electronics and should not be selected for new designs. CD74AC245M (Harris Corporation) is obsolete and RoHS non-compliant, unsuitable for current production applications.

Package Consideration:

SN74AC245NSR uses a narrower 20-SO package (0.209" width vs. 0.295" width). While electrically compatible, the reduced package width requires PCB layout verification to confirm footprint compatibility before substitution.

Frequently Asked Questions (FAQ)

Q: Can MC74AC245DWR2G be used as a direct replacement for 74AC245SCX?

A: Yes. MC74AC245DWR2G is a direct substitute. Both parts share identical voltage supply range (2V ~ 6V), output current (24mA), operating temperature (-40°C ~ 85°C), and 20-SOIC package footprint (0.295" width). The primary difference is manufacturer (onsemi vs. onsemi) and MSL rating (both MSL-3). No circuit modification is required.

Q: What is the difference between Cut Tape & Digi-Reel and Tube packaging?

A: Cut Tape & Digi-Reel and Tube are supplier packaging formats that do not affect electrical performance or PCB footprint. Cut Tape & Digi-Reel is standard for automated assembly lines, while Tube packaging is used for manual assembly or lower-volume applications. Select based on procurement and assembly process requirements.

Q: Can CD74AC245M96 replace 74AC245SCX in all applications?

A: CD74AC245M96 is electrically compatible but operates across a different voltage range (1.5V ~ 5.5V vs. 2V ~ 6V) and temperature range (-55°C ~ 125°C vs. -40°C ~ 85°C). It is suitable for applications requiring extended environmental performance. Verify that your circuit design operates within the 1.5V ~ 5.5V range before substitution.

Q: Why is SN74AC245NSR listed as a similar substitute rather than a direct substitute?

A: SN74AC245NSR uses a narrower 20-SO package (0.209" width) compared to the standard 20-SOIC package (0.295" width) of 74AC245SCX. While electrically identical, the reduced package width requires PCB layout verification to confirm that the narrower footprint is compatible with your board design before substitution.

Q: Is 74AC245SCX RoHS compliant?

A: Yes. 74AC245SCX is ROHS3 compliant. All recommended direct substitutes (MC74AC245DWR2G, SN74AC245DWR, MC74AC245DWG) are also ROHS3 compliant. CD74AC245M96 is ROHS3 compliant. Avoid CD74AC245M (Harris Corporation), which is RoHS non-compliant.

Q: What does MSL-3 (168 Hours) mean for 74AC245SCX?

A: MSL-3 indicates Moisture Sensitivity Level 3, meaning the component can be exposed to ambient conditions (30°C, 85% relative humidity) for a maximum of 168 hours before soldering. After this period, the component must be baked to remove absorbed moisture. MC74AC245DWR2G shares this MSL-3 rating. SN74AC245DWR and CD74AC245M96 have MSL-1 (unlimited exposure), offering superior moisture tolerance.