74ACTQ04PC Equivalent & Substitute Parts

Part Overview

The 74ACTQ04PC is a 6-channel inverter logic IC manufactured by onsemi in a 14-MDIP package. This component performs basic logic inversion operations and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity, procurement flexibility, and long-term system reliability.

Substiute Parts

74ACTQ04PC

onsemiIn Stock: 92174ACTQ04PC Datasheet

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CD74ACT04E

Harris CorporationIn Stock: 2684CD74ACT04E Datasheet

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SN74ACT04N

Texas InstrumentsIn Stock: 2361SN74ACT04N Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ACTQ04PC are qualified based on the following criteria:

• Identical logic function: 6-channel inverter with single input per channel
• Matching supply voltage range: 4.5V ~ 5.5V
• Equivalent output drive capability: 24mA high and low
• Compatible input logic thresholds: 0.8V low, 2V high
• Compatible package footprint: 14-DIP (0.300", 7.62mm)
• Through-hole mounting compatibility

The substitute parts identified—CD74ACT04E and SN74ACT04N—meet all these electrical and mechanical requirements and share the same base product number (74ACT04 series).

Parameter Comparison

Engineering Selection Recommendations

SN74ACT04N (Texas Instruments) is the preferred substitute for new designs and procurement. This part maintains active product status, ensuring ongoing availability and manufacturer support. It matches the original 74ACTQ04PC in quiescent current (2 µA), operating temperature range (-40°C ~ 85°C), and propagation delay performance (8.5ns). The SN74ACT04N carries RoHS3 compliance, supporting modern environmental and regulatory requirements.

CD74ACT04E (Harris Corporation) is a functional equivalent with identical electrical characteristics but carries an extended operating temperature range (-55°C ~ 125°C). This part is obsolete and carries RoHS non-compliant status. Selection of this substitute should be limited to applications where the extended temperature range is required and where RoHS compliance is not mandated.

Both substitutes are pin-compatible and footprint-compatible with the original 74ACTQ04PC, enabling direct replacement in through-hole PCB designs.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT04N directly replace the 74ACTQ04PC without PCB modifications?

A: Yes. The SN74ACT04N is pin-compatible and footprint-compatible with the 74ACTQ04PC. Both use the 14-DIP (0.300", 7.62mm) package with identical pinout. No PCB layout changes are required.

Q: What is the difference in propagation delay between these parts?

A: The 74ACTQ04PC has a maximum propagation delay of 7.5ns at 5V with 50pF load. The SN74ACT04N is 8.5ns, and the CD74ACT04E is 9.3ns. These differences are within typical system timing margins for standard logic applications.

Q: Why is the CD74ACT04E listed as an alternative if it is obsolete?

A: The CD74ACT04E is included because it meets all electrical and mechanical substitution criteria. However, its obsolete status and RoHS non-compliance make it a secondary choice. The SN74ACT04N is recommended for new applications.

Q: Are there any compliance differences between the substitutes?

A: Yes. The SN74ACT04N is RoHS3 compliant and REACH unaffected. The CD74ACT04E is RoHS non-compliant. For applications subject to environmental regulations, the SN74ACT04N is the appropriate choice.

Q: What is the quiescent current difference, and does it matter?

A: The 74ACTQ04PC and SN74ACT04N both draw 2 µA maximum quiescent current. The CD74ACT04E draws 4 µA. For low-power or battery-operated applications, the lower quiescent current of the SN74ACT04N is preferable.

Q: Can I use the CD74ACT04E in applications requiring the -40°C ~ 85°C temperature range?

A: Yes. The CD74ACT04E operating range of -55°C ~ 125°C encompasses the -40°C ~ 85°C requirement. However, the SN74ACT04N is still preferred due to active status and RoHS compliance.