74FCT573ATQG Equivalent & Substitute Parts

Part Overview

The 74FCT573ATQG is a D-Type Transparent Latch logic IC manufactured by Renesas Electronics Corporation, featuring an 8:8 channel configuration with tri-state output capability. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement continuity. The part operates within the 74FCT logic family standard, maintaining compatibility with systems requiring transparent latch functionality in a 20-QSOP surface mount package.

Substiute Parts

74FCT573ATQG

Renesas Electronics CorporationIn Stock: 92174FCT573ATQG Datasheet

Current PartRFQ

CY74FCT2573ATQCT

Texas InstrumentsIn Stock: 1641CY74FCT2573ATQCT Datasheet

MFR RecommendedRFQ

CY74FCT573CTQCT

Texas InstrumentsIn Stock: 912CY74FCT573CTQCT Datasheet

MFR RecommendedRFQ

74FCT373CTQG

IDT, Integrated Device Technology IncIn Stock: 837374FCT373CTQG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74FCT573ATQG is determined by strict alignment of the following critical parameters:

Core Compatibility Criteria:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Voltage Supply Range: 4.75V ~ 5.25V
• Independent Circuits: 1
• Operating Temperature Range: -40°C ~ 85°C
• Package Type: 20-SSOP (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Substitute Classification:

MFR Recommended Substitutes maintain full electrical and mechanical compatibility with identical or superior performance characteristics:

• CY74FCT2573ATQCT (Texas Instruments) — Active status with improved propagation delay (1.5ns)
• CY74FCT573CTQCT (Texas Instruments) — Active status with enhanced output current capability

Parametric Equivalent provides identical electrical performance within the same package footprint:

• 74FCT373CTQG (IDT, Integrated Device Technology Inc) — Active status with matching propagation delay and output current specifications

Parameter Comparison

Engineering Selection Recommendations

For Active Product Continuation: The CY74FCT2573ATQCT and CY74FCT573CTQCT from Texas Instruments are recommended as primary substitutes due to active product status and ROHS3 compliance certification. Both parts maintain the required electrical specifications and 20-SSOP package compatibility.

For Parametric Equivalence: The 74FCT373CTQG from IDT provides identical propagation delay and output current characteristics to the original 74FCT573ATQG, with confirmed active product status and ROHS3 compliance.

Compliance Considerations: All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component. Moisture sensitivity level differences (MSL 1 versus MSL 2) reflect standard industry variations and do not impact functional substitution within the specified operating conditions.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT2573ATQCT replace 74FCT573ATQG in existing designs? A: Yes. The CY74FCT2573ATQCT maintains full electrical and mechanical compatibility. The improved propagation delay (1.5ns versus 2ns) represents enhanced performance and does not require design modification.

Q: What is the difference between CY74FCT2573ATQCT and CY74FCT573CTQCT? A: Both are Texas Instruments active substitutes with identical logic configuration and package. The primary difference is output current capability: CY74FCT2573ATQCT provides 15mA/12mA, while CY74FCT573CTQCT provides 32mA/64mA. Selection depends on load current requirements.

Q: Is 74FCT373CTQG a direct replacement? A: Yes. The 74FCT373CTQG is a parametric equivalent with matching propagation delay (2ns) and output current (15mA/48mA) specifications. It operates within identical voltage and temperature ranges and uses the same 20-SSOP package.

Q: Are there packaging differences between substitutes? A: All substitutes use the 20-SSOP (0.154", 3.90mm Width) package, ensuring PCB footprint compatibility. Packaging format options (Cut Tape, Tape & Reel, Bulk) vary by supplier but do not affect electrical or mechanical performance.

Q: What is the impact of MSL rating differences? A: The original 74FCT573ATQG has MSL 1 (Unlimited), while substitutes have MSL 2 (1 Year). This affects moisture exposure handling during storage and assembly. Standard moisture control procedures for MSL 2 components are sufficient for typical manufacturing environments.

Q: Are all substitutes RoHS compliant? A: The Texas Instruments substitutes (CY74FCT2573ATQCT and CY74FCT573CTQCT) are confirmed ROHS3 compliant. The IDT 74FCT373CTQG maintains equivalent environmental compliance standards.