74ACQ533SC Equivalent & Substitute Parts

Part Overview

The 74ACQ533SC is an obsolete logic IC featuring tri-state output capability in a 20-SOIC surface mount package. This component is classified as an OC (open collector) inverting latch designed for digital logic applications requiring tri-state output control. Due to its obsolete product status, identifying functionally equivalent substitute parts is essential for system redesign, legacy product support, and continued component availability.

Substiute Parts

74ACQ533SC

onsemiIn Stock: 100074ACQ533SC Datasheet

Current PartRFQ

SN74AC533DW

Texas InstrumentsIn Stock: 1114SN74AC533DW Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ACQ533SC are identified based on the following critical parameters that determine functional and physical compatibility:

• Package Compatibility: 20-SOIC (0.295", 7.50mm Width) surface mount package
• Output Type: Tri-state output capability
• Logic Family: 74AC series logic IC
• Base Product Number: 74AC533 (core functional designation)
• Mounting Type: Surface mount technology
• Regulatory Compliance: REACH Unaffected and ECCN EAR99 classification

The SN74AC533DW from Texas Instruments meets all these substitution criteria while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The SN74AC533DW from Texas Instruments is the primary substitute for the obsolete 74ACQ533SC. This substitution is supported by:

• Identical Physical Package: Both components use the 20-SOIC (0.295", 7.50mm Width) surface mount package, ensuring direct PCB compatibility without layout modifications.
• Matching Output Type: Both parts feature tri-state output capability, maintaining functional equivalence in circuit applications.
• Active Product Status: The SN74AC533DW is an active product with ongoing manufacturer support, ensuring long-term availability and supply chain reliability.
• Enhanced Compliance: The substitute part achieves ROHS3 compliance, addressing modern regulatory requirements while maintaining REACH Unaffected and EAR99 classifications consistent with the original part.
• Unlimited Moisture Sensitivity: Both components share MSL 1 (Unlimited) rating, indicating no moisture-related handling restrictions.

For applications requiring the 74ACQ533SC, the SN74AC533DW provides a direct functional and physical replacement with improved product lifecycle status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the SN74AC533DW be used as a direct replacement for the 74ACQ533SC on existing PCBs?

A: Yes. Both components use the identical 20-SOIC (0.295", 7.50mm Width) surface mount package. No PCB layout modifications are required for physical substitution.

Q: What are the key differences between these two parts?

A: The primary differences are product status and compliance certifications. The 74ACQ533SC is obsolete and RoHS non-compliant, while the SN74AC533DW is an active product with ROHS3 compliance. Both share the same package, tri-state output type, and regulatory classifications (REACH Unaffected, EAR99).

Q: Are there any electrical parameter differences I should consider?

A: The SN74AC533DW provides specified electrical parameters including 2V ~ 6V supply voltage, 2ns propagation delay, and 24mA output current capability. The 74ACQ533SC does not have these parameters specified in available documentation. For applications with specific electrical requirements, the SN74AC533DW's documented specifications should be verified against your circuit design.

Q: Is the SN74AC533DW available in the same packaging options as the 74ACQ533SC?

A: Both parts are supplied in 20-SOIC surface mount packages. The SN74AC533DW is available in tube packaging, while the 74ACQ533SC packaging format is not specified. Both share identical physical dimensions and pin configurations.

Q: What is the moisture sensitivity rating for these components?

A: Both the 74ACQ533SC and SN74AC533DW carry an MSL 1 (Unlimited) rating, indicating no moisture-related handling or storage restrictions.

Q: Are there any regulatory or compliance considerations for substitution?

A: The SN74AC533DW offers improved compliance with ROHS3 certification, addressing modern environmental regulations. Both parts maintain REACH Unaffected and EAR99 classifications. If your application requires RoHS compliance, the SN74AC533DW is the appropriate choice.