74ACTQ245SCX Equivalent & Substitute Parts

Part Overview

The 74ACTQ245SCX is a non-inverting transceiver logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability in a 20-SOIC package. This component operates across a 4.5V to 5.5V supply voltage range with output current ratings of 24mA for both high and low states.

The 74ACTQ245SCX is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this transceiver architecture.

Substiute Parts

74ACTQ245SCX

onsemiIn Stock: 232074ACTQ245SCX Datasheet

Current PartRFQ

MC74ACT245DWG

onsemiIn Stock: 4082MC74ACT245DWG Datasheet

SimilarRFQ

74ACT245SCX

onsemiIn Stock: 365574ACT245SCX Datasheet

Parametric EquivalentRFQ

MC74ACT245DWR2G

onsemiIn Stock: 1813MC74ACT245DWR2G Datasheet

Parametric EquivalentRFQ

CD74ACT245M96

Texas InstrumentsIn Stock: 15191CD74ACT245M96 Datasheet

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SN74ACT245DW

Texas InstrumentsIn Stock: 6197SN74ACT245DW Datasheet

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SN74ACT245NSR

Texas InstrumentsIn Stock: 2785SN74ACT245NSR Datasheet

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SN74ACT245DWR

Texas InstrumentsIn Stock: 4903SN74ACT245DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACTQ245SCX is determined by the following critical parameters:

• Logic type and functional architecture (Transceiver, Non-Inverting)
• Element and bit configuration (1 element, 8 bits per element)
• Output type (3-State)
• Output current specifications (24mA, 24mA)
• Supply voltage range (4.5V ~ 5.5V)
• Package type and physical dimensions (20-SOIC, 0.295" width)
• Operating temperature range (-40°C ~ 85°C)

Substitute parts are grouped into two categories:

Parametric Equivalents: Parts that match all critical electrical and mechanical parameters of the 74ACTQ245SCX, differing only in product status or packaging format.

Similar Parts: Parts that share the same base product number (74ACT245) and core functional specifications but may differ in operating temperature range, package dimensions, or product status. These parts maintain electrical compatibility within the specified parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

MC74ACT245DWG, 74ACT245SCX, and MC74ACT245DWR2G are active onsemi products that maintain full electrical and mechanical compatibility with the 74ACTQ245SCX. These parts are ROHS3 compliant and represent the most direct substitution path for obsolete unit replacement.

Secondary Substitutes (Texas Instruments):

SN74ACT245DWR and CD74ACT245M96 are active Texas Instruments equivalents that match all critical electrical parameters and package specifications. CD74ACT245M96 offers an extended operating temperature range (-55°C ~ 125°C) compared to the original specification, providing additional thermal margin for demanding applications. SN74ACT245DWR maintains the original temperature specification (-40°C ~ 85°C).

Package Variant:

SN74ACT245NSR is functionally equivalent but uses a narrower 20-SO package (0.209" width) compared to the standard 20-SOIC (0.295" width). This part is suitable only for designs where the reduced package width is compatible with PCB layout constraints.

Discontinued Part:

SN74ACT245DW is discontinued at DiGi Electronics but remains electrically equivalent. Availability through alternative distribution channels should be evaluated before selection.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74ACTQ245SCX with MC74ACT245DWG?

A: Yes. MC74ACT245DWG is an active onsemi product with identical electrical specifications, output current ratings, supply voltage range, operating temperature, and 20-SOIC package dimensions. The primary difference is product status (active vs. obsolete) and packaging format (tube vs. original packaging).

Q: What is the difference between 74ACT245SCX and MC74ACT245DWR2G?

A: Both parts are onsemi 74ACT245 base products with identical electrical and mechanical parameters. The difference lies in packaging format: 74ACT245SCX uses Cut Tape & Digi-Reel packaging, while MC74ACT245DWR2G also uses Cut Tape & Digi-Reel. Both are active products suitable for new designs.

Q: Can I use CD74ACT245M96 in place of 74ACTQ245SCX?

A: Yes, with consideration for the extended operating temperature range. CD74ACT245M96 operates from -55°C to 125°C, compared to the original -40°C to 85°C specification. All other electrical parameters and the 20-SOIC package dimensions are identical. This part is manufactured by Texas Instruments and is ROHS3 compliant.

Q: Why does SN74ACT245NSR have a different package width?

A: SN74ACT245NSR uses a 20-SO package with 0.209" width, compared to the standard 20-SOIC with 0.295" width. Both are surface-mount packages with identical pin counts and electrical specifications. Selection depends on PCB layout compatibility and available board space.

Q: Are all substitute parts ROHS3 compliant?

A: The active onsemi substitutes (MC74ACT245DWG, 74ACT245SCX, MC74ACT245DWR2G) and Texas Instruments substitutes (CD74ACT245M96, SN74ACT245DW, SN74ACT245NSR, SN74ACT245DWR) are all ROHS3 compliant. The original 74ACTQ245SCX is REACH unaffected but predates ROHS3 classification.

Q: What is the moisture sensitivity level difference between parts?

A: The original 74ACTQ245SCX has MSL 1 (unlimited). Active onsemi substitutes MC74ACT245DWG and MC74ACT245DWR2G have MSL 3 (168 hours). Texas Instruments parts CD74ACT245M96 and SN74ACT245DWR have MSL 1 (unlimited). MSL 3 requires controlled storage and handling within 168 hours of package opening.