74ACTQ533SC Equivalent & Substitute Parts

Part Overview

The 74ACTQ533SC is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring 1 channel with 8:8 circuit configuration and tri-state output capability. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity. The part operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC surface mount package.

Substiute Parts

74ACTQ533SC

onsemiIn Stock: 114674ACTQ533SC Datasheet

Current PartRFQ

SN74ACT533DW

Texas InstrumentsIn Stock: 1775SN74ACT533DW Datasheet

SimilarRFQ

SN74ACT573DW

Texas InstrumentsIn Stock: 2818SN74ACT573DW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74ACTQ533SC is determined by strict equivalence across the following critical parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Supply Voltage Range: 4.5V ~ 5.5V
• Independent Circuits: 1
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C ~ 85°C

Substitute parts must maintain identical functional specifications and physical packaging to ensure direct replacement capability. Propagation delay and output current characteristics may vary within acceptable engineering tolerances for logic circuits of this classification.

Parameter Comparison

Engineering Selection Recommendations

SN74ACT533DW (Texas Instruments) is the primary substitute for the 74ACTQ533SC. This part maintains full parametric equivalence across all critical specifications and is currently in active production status, ensuring long-term availability and supply chain stability. The SN74ACT533DW carries ROHS3 compliance certification, meeting modern environmental and regulatory requirements.

SN74ACT573DW (Texas Instruments) serves as a secondary parametric equivalent, matching the 74ACTQ533SC across all functional and physical parameters including propagation delay. However, this part is listed as discontinued at DiGi Electronics, which may impact procurement availability. ROHS3 compliance is maintained.

Both Texas Instruments substitutes are packaged in 20-SOIC format with identical pinout and electrical characteristics, enabling direct board-level replacement without design modification.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT533DW directly replace 74ACTQ533SC in existing designs?

A: Yes. The SN74ACT533DW maintains identical logic type, circuit configuration, output type, supply voltage range, package format, and operating temperature specifications. Direct substitution is supported without circuit redesign.

Q: What is the significance of the propagation delay difference between SN74ACT533DW (2.5ns) and 74ACTQ533SC (6ns)?

A: The SN74ACT533DW exhibits faster propagation delay, which is compatible with designs specified for the 74ACTQ533SC. Faster propagation does not create functional incompatibility in latch circuits of this classification.

Q: Why is the 74ACTQ533SC marked as obsolete?

A: Obsolete status indicates the part is no longer manufactured by onsemi. Substitute parts from active manufacturers ensure continued design support and component availability.

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

A: No. All three parts use identical 20-SOIC (0.295", 7.50mm Width) surface mount packaging with matching pinout configurations.

Q: What compliance certifications should be considered for new designs?

A: Both Texas Instruments substitutes carry ROHS3 compliance certification. For applications requiring specific environmental or regulatory compliance, verify that ROHS3 status meets project requirements.

Q: Is SN74ACT573DW a viable alternative if SN74ACT533DW is unavailable?

A: SN74ACT573DW is parametrically equivalent and functionally compatible. However, its discontinued status at DiGi Electronics may limit procurement options. Verify current availability through authorized distributors before design commitment.