74ACT04SCX Equivalent & Substitute Parts

Part Overview

The 74ACT04SCX is a 6-channel inverter logic IC manufactured by onsemi in a 14-SOIC surface mount package. This part is currently active in production with 110,558 units in stock. The 74ACT04 series represents a standard logic inverter function widely used in digital circuit design. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and functional equivalence within the 74ACT logic family.

Substiute Parts

74ACT04SCX

onsemiIn Stock: 11060974ACT04SCX Datasheet

Current PartRFQ

MC74ACT04DR2G

onsemiIn Stock: 3489MC74ACT04DR2G Datasheet

DirectRFQ

CD74ACT04M96

Harris CorporationIn Stock: 1226CD74ACT04M96 Datasheet

UpgradeRFQ

SN74ACT04D

Texas InstrumentsIn Stock: 3643SN74ACT04D Datasheet

SimilarRFQ

SN74ACT04NSR

Texas InstrumentsIn Stock: 5161SN74ACT04NSR Datasheet

SimilarRFQ

SN74ACT04DR

Texas InstrumentsIn Stock: 2482SN74ACT04DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ACT04SCX are classified based on electrical parameter equivalence and package compatibility. The primary substitution criteria are:

• Identical logic function (6-channel inverter, 1 input per channel)
• Matching supply voltage range (4.5V ~ 5.5V)
• Compatible output current specifications (24mA minimum)
• Propagation delay within acceptable tolerance (8.5ns nominal @ 5V, 50pF)
• Input logic level thresholds (0.8V low, 2V high)
• Surface mount package compatibility (14-SOIC or 14-SO variants)
• Operating temperature range coverage (-40°C ~ 85°C minimum)

Substitute parts are grouped into the following categories:

Direct Manufacturer Equivalent: Parts with identical electrical specifications and packaging from alternative manufacturers.

Upgrade/Alternative Status: Parts with extended operating temperature range or different product lifecycle status.

Parametric Equivalent: Parts with minor variations in quiescent current or package width that remain functionally compatible.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Recommended): MC74ACT04DR2G (onsemi) and SN74ACT04DR (Texas Instruments) are the preferred substitutes. Both maintain identical electrical specifications to the 74ACT04SCX, are currently active in production, and carry ROHS3 compliance certification. MC74ACT04DR2G is supplied in Tape & Reel packaging, while SN74ACT04DR is available in Cut Tape format, matching the original part's packaging option.

Alternative Substitute: SN74ACT04NSR (Texas Instruments) is an active production part with ROHS3 compliance. This part exhibits lower quiescent current (2 µA vs. 4 µA) and identical propagation delay. The package width differs (0.209" vs. 0.154"), which may require PCB layout verification for footprint compatibility.

Secondary Substitute: SN74ACT04D (Texas Instruments) provides electrical equivalence with lower quiescent current and ROHS3 compliance. However, this part is discontinued at DiGi Electronics and should be considered only when primary substitutes are unavailable.

Not Recommended: CD74ACT04M96 (Harris Corporation) is obsolete, non-compliant with current RoHS standards, and exhibits slightly higher propagation delay (9.3ns vs. 8.5ns). This part should not be selected for new designs or production applications.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT04NSR be used as a direct replacement for 74ACT04SCX?

A: SN74ACT04NSR is electrically equivalent and functionally compatible. However, the package width differs (0.209" vs. 0.154"), requiring verification that the PCB footprint accommodates the wider 14-SO package. Electrical performance is identical.

Q: What is the difference between MC74ACT04DR2G and SN74ACT04DR?

A: Both parts are parametrically identical to the 74ACT04SCX with matching quiescent current (4 µA and 2 µA respectively), propagation delay, and operating temperature range. The primary difference is manufacturer (onsemi vs. Texas Instruments) and packaging format (Tape & Reel vs. Cut Tape). Selection depends on supply chain availability and packaging requirements.

Q: Why is CD74ACT04M96 listed if it is obsolete?

A: CD74ACT04M96 is included for reference in legacy system maintenance scenarios. This part is obsolete, non-RoHS compliant, and exhibits higher propagation delay. It should not be selected for new applications.

Q: Are all substitute parts RoHS compliant?

A: MC74ACT04DR2G, SN74ACT04D, SN74ACT04NSR, and SN74ACT04DR are ROHS3 compliant. CD74ACT04M96 is not RoHS compliant and should not be used in applications requiring RoHS certification.

Q: What is the significance of quiescent current differences between parts?

A: The 74ACT04SCX specifies 4 µA maximum quiescent current, while Texas Instruments parts (SN74ACT04D, SN74ACT04NSR, SN74ACT04DR) specify 2 µA. Lower quiescent current reduces standby power consumption. Both specifications are within acceptable operating parameters for the 74ACT logic family.

Q: Can packaging format affect circuit performance?

A: Packaging format (Cut Tape, Tape & Reel, Tube, Bulk) affects supply chain logistics and handling but does not alter electrical performance. Package case type (14-SOIC vs. 14-SO) may require PCB footprint verification due to dimensional differences in lead pitch or body width.