74ACTQ541PC Equivalent & Substitute Parts

Part Overview

The 74ACTQ541PC is a Buffer, Non-Inverting logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability. This component operates across a 4.5V to 5.5V supply voltage range and is housed in a 20-PDIP package for through-hole mounting applications. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

74ACTQ541PC

onsemiIn Stock: 90774ACTQ541PC Datasheet

Current PartRFQ

CD74ACT541E

Harris CorporationIn Stock: 15136CD74ACT541E Datasheet

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TC74ACT541PF

Toshiba Semiconductor and StorageIn Stock: 721TC74ACT541PF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACTQ541PC is determined by strict alignment across the following critical parameters:

• Logic Type: Buffer, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 24mA, 24mA
• Voltage - Supply: 4.5V ~ 5.5V
• Package / Case: 20-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

All identified substitute parts maintain these core electrical and mechanical specifications, ensuring functional compatibility at the circuit level. Variations in operating temperature range, product status, and compliance certifications are noted but do not preclude substitution where thermal and regulatory requirements permit.

Parameter Comparison

Engineering Selection Recommendations

Both CD74ACT541E and TC74ACT541PF satisfy the core electrical and mechanical requirements for direct substitution with the 74ACTQ541PC.

The CD74ACT541E (Harris Corporation) maintains identical operating temperature specifications (-40°C ~ 85°C) and shares obsolete product status with the original part. This part is RoHS non-compliant.

The TC74ACT541PF (Toshiba Semiconductor and Storage) offers extended operating temperature range (-40°C ~ 85°C, matching the original) and carries active product status, indicating ongoing manufacturer support. This part is ROHS3 compliant, providing regulatory advantage for applications subject to RoHS requirements.

Selection between these alternatives should be based on system thermal requirements, regulatory compliance mandates, and component availability constraints.

Frequently Asked Questions (FAQ)

Q: Can CD74ACT541E and TC74ACT541PF be used interchangeably with 74ACTQ541PC?

A: Both parts are functionally equivalent at the circuit level. All three components share identical logic type, element count, bit width, output type, current ratings, supply voltage range, and 20-DIP package specifications. Substitution is electrically valid where operating temperature and compliance requirements align.

Q: What is the significance of the different operating temperature ranges?

A: The CD74ACT541E operates from -55°C to 125°C, while both the 74ACTQ541PC and TC74ACT541PF operate from -40°C to 85°C. Selection depends on the thermal environment of the application. Extended temperature range provides margin for extreme conditions but is not required for standard industrial applications.

Q: Does RoHS compliance affect substitution decisions?

A: RoHS compliance is a regulatory and procurement consideration, not an electrical one. The TC74ACT541PF is ROHS3 compliant, while the CD74ACT541E is RoHS non-compliant. Applications subject to RoHS regulations should specify TC74ACT541PF. Non-regulated applications may use either part based on availability and cost.

Q: Are there package or pinout differences between these parts?

A: All three parts use the 20-DIP (0.300", 7.62mm) package with through-hole mounting. Pinout and mechanical dimensions are identical, enabling direct socket substitution without PCB modification.

Q: Why is the 74ACTQ541PC listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The CD74ACT541E shares this status, while TC74ACT541PF remains in active production. For new designs or long-term support, TC74ACT541PF is the preferred choice due to ongoing manufacturer availability.