74ACTQ04SC Equivalent & Substitute Parts

Part Overview

The 74ACTQ04SC is a 6-channel inverter logic IC manufactured by onsemi in a 14-SOIC surface mount package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74ACTQ04SC operates within the standard 74ACT logic family specifications and serves as a direct logic inversion function in digital circuit applications.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Voltage Supply Range	4.5V ~ 5.5V
Current Output High/Low	24mA / 24mA
Input Logic Level Low	0.8V
Input Logic Level High	2V
Package Type	14-SOIC
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C

Substitute Part Grouping Explanation

Substitution for the 74ACTQ04SC is determined by the following critical parameters:

Logic family and function (6-channel inverter)
Package type (14-SOIC surface mount)
Voltage supply range (4.5V ~ 5.5V)
Output current capability (24mA minimum)
Input logic thresholds (0.8V low, 2V high)
Operating temperature range (-40°C ~ 85°C minimum)

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional and physical compatibility. Differences in quiescent current, propagation delay, and product status are noted but do not prevent substitution within the defined parameter envelope.

Parameter Comparison

Part Number	Manufacturer	Product Status	Quiescent Current (Max)	Propagation Delay @ 5V, 50pF	Operating Temp Range	Package	RoHS Status
74ACTQ04SC	onsemi	Obsolete	2 µA	7.5ns	-40°C ~ 85°C	14-SOIC	Not specified
74ACT04SC	onsemi	Active	4 µA	8.5ns	-40°C ~ 85°C	14-SOIC	ROHS3 Compliant
MC74ACT04DR2G	onsemi	Active	4 µA	8.5ns	-40°C ~ 85°C	14-SOIC	ROHS3 Compliant
CD74ACT04M96	Harris Corporation	Obsolete	4 µA	9.3ns	-55°C ~ 125°C	14-SOIC	RoHS non-compliant
SN74ACT04D	Texas Instruments	Discontinued at DiGi Electronics	2 µA	8.5ns	-40°C ~ 85°C	14-SOIC	ROHS3 Compliant
SN74ACT04DR	Texas Instruments	Active	2 µA	8.5ns	-40°C ~ 85°C	14-SOIC	ROHS3 Compliant
SN74ACT04IDREP	Texas Instruments	Active	2 µA	8.5ns	-40°C ~ 85°C	14-SOIC	ROHS3 Compliant
SN74ACT04NSR	Texas Instruments	Active	2 µA	8.5ns	-40°C ~ 85°C	14-SO	ROHS3 Compliant

Engineering Selection Recommendations

For new designs and production applications, the following selection criteria apply:

Active Status Priority: SN74ACT04DR, SN74ACT04IDREP, and 74ACT04SC are currently active products and represent the preferred substitutes for the obsolete 74ACTQ04SC. These parts ensure long-term availability and supply chain stability.

RoHS Compliance: All active substitute parts listed (onsemi 74ACT04SC, MC74ACT04DR2G, and Texas Instruments SN74ACT04D, SN74ACT04DR, SN74ACT04IDREP, SN74ACT04NSR) meet ROHS3 compliance requirements. The CD74ACT04M96 is RoHS non-compliant and should be avoided in applications requiring regulatory compliance.

Propagation Delay Considerations: The 74ACTQ04SC exhibits the fastest propagation delay at 7.5ns. Substitute parts range from 8.5ns to 9.3ns. Applications with strict timing requirements should verify that the increased delay remains within system specifications.

Temperature Range: The CD74ACT04M96 offers an extended operating range (-55°C ~ 125°C) compared to the standard -40°C ~ 85°C range of other parts. This extended range is available only from the Harris Corporation part, which is obsolete.

Packaging Variants: The SN74ACT04NSR uses a 14-SO package (0.209" width) versus the standard 14-SOIC (0.154" width) used by all other parts. Physical board layout compatibility must be verified before selection.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74ACTQ04SC with 74ACT04SC?

A: Yes. Both parts maintain identical electrical specifications for voltage supply, output current, input logic thresholds, and operating temperature range. The 74ACT04SC is the active production equivalent and is the recommended substitute.

Q: What is the difference between onsemi and Texas Instruments versions?

A: Both manufacturers produce 74ACT04 inverter ICs that meet the same electrical specifications. The primary differences are product status and packaging options. Texas Instruments offers SN74ACT04DR (active status) and SN74ACT04NSR (14-SO package variant). onsemi offers 74ACT04SC and MC74ACT04DR2G in standard 14-SOIC packaging.

Q: Does the increased propagation delay of substitute parts affect my circuit?

A: The 74ACTQ04SC has a 7.5ns propagation delay, while most substitutes range from 8.5ns to 9.3ns. This 1ns to 1.8ns difference is negligible in most digital logic applications. Verify timing requirements in high-speed or real-time critical applications before final selection.

Q: Is the CD74ACT04M96 a suitable substitute?

A: The CD74ACT04M96 meets all electrical specifications but is obsolete and RoHS non-compliant. It should not be selected for new designs. Active alternatives are available from onsemi and Texas Instruments.

Q: What is the difference between SN74ACT04D and SN74ACT04DR?

A: SN74ACT04D is discontinued at DiGi Electronics, while SN74ACT04DR remains active. Both share identical electrical specifications. SN74ACT04DR is the recommended Texas Instruments substitute due to active product status.

Q: Can I use SN74ACT04NSR as a direct board replacement?

A: SN74ACT04NSR uses a 14-SO package (0.209" width) instead of the standard 14-SOIC (0.154" width). Physical footprint compatibility must be verified. Electrical specifications are identical, but PCB layout changes may be required.

Q: Are all substitute parts REACH compliant?

A: All parts listed are REACH Unaffected, indicating compliance with REACH regulations.

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