74FCT240CTQG Equivalent & Substitute Parts

Part Overview

The 74FCT240CTQG is a Buffer, Inverting logic IC manufactured by Renesas Electronics Corporation, featuring 2 elements with 4 bits per element and 3-state output capability. This component operates within the 4.75V to 5.25V supply voltage range and is housed in a 20-QSOP package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

74FCT240CTQG

Renesas Electronics CorporationIn Stock: 190674FCT240CTQG Datasheet

Current PartRFQ

CY74FCT2240CTQCT

Texas InstrumentsIn Stock: 3322CY74FCT2240CTQCT Datasheet

MFR RecommendedRFQ

CY74FCT240ATQCT

Texas InstrumentsIn Stock: 5660CY74FCT240ATQCT Datasheet

MFR RecommendedRFQ

CY74FCT240TQCT

Cypress Semiconductor CorpIn Stock: 4179CY74FCT240TQCT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74FCT240CTQG is determined by strict alignment of the following critical parameters:

• Logic Type: Buffer, Inverting (2 elements, 4 bits per element)
• Output Type: 3-State
• Voltage - Supply: 4.75V ~ 5.25V
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 20-SSOP (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

All three substitute parts listed below meet these core electrical and mechanical requirements. Variations in output current specifications (15mA/64mA vs. 32mA/64mA) remain within acceptable tolerance for buffer applications where the primary function is signal inversion and 3-state control. Packaging format differences (Tube vs. Tape & Reel vs. Bulk) do not affect functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are classified as active products, providing long-term availability and supply chain stability compared to the obsolete 74FCT240CTQG. Both Texas Instruments options (CY74FCT2240CTQCT and CY74FCT240ATQCT) carry ROHS3 compliance certification, ensuring regulatory alignment with modern manufacturing standards. The Cypress Semiconductor option (CY74FCT240TQCT) maintains active product status and meets core electrical specifications.

Selection between substitutes should prioritize active product status and compliance certifications. The Texas Instruments CY74FCT240ATQCT offers output current specifications (32mA, 64mA) that match the Cypress alternative, while the CY74FCT2240CTQCT provides reduced output high current (15mA) comparable to the original part. All three options maintain identical supply voltage ranges, operating temperature specifications, and 20-SSOP package geometry required for direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 74FCT240CTQG be directly replaced with any of these substitute parts?

A: Yes. All three substitute parts maintain identical logic function (Buffer, Inverting with 2 elements and 4 bits per element), 3-state output capability, supply voltage range (4.75V ~ 5.25V), operating temperature range (-40°C ~ 85°C), and 20-SSOP package geometry. Direct PCB substitution is supported without circuit redesign.

Q: What is the significance of the output current differences between the original and substitute parts?

A: The original 74FCT240CTQG specifies 15mA output high and 64mA output low current. The CY74FCT2240CTQCT maintains the 15mA output high specification, while CY74FCT240ATQCT and CY74FCT240TQCT specify 32mA output high. These variations remain within acceptable operating margins for buffer applications and do not affect functional compatibility in standard logic circuits.

Q: Why is the original part classified as obsolete?

A: The 74FCT240CTQG is marked obsolete by Renesas Electronics Corporation. All three substitute parts are classified as active products, ensuring continued availability and manufacturing support for new designs and system maintenance.

Q: Are there packaging format differences between the original and substitutes?

A: Yes. The original 74FCT240CTQG is supplied in Tube packaging, while CY74FCT2240CTQCT is supplied in Tape & Reel format and CY74FCT240TQCT is supplied in Bulk format. These packaging differences do not affect component functionality or PCB compatibility. Packaging selection should be based on assembly process requirements and inventory management practices.

Q: Do all substitute parts meet RoHS compliance requirements?

A: The Texas Instruments options (CY74FCT2240CTQCT and CY74FCT240ATQCT) are explicitly ROHS3 compliant. The Cypress Semiconductor CY74FCT240TQCT does not specify RoHS status in the provided data. Compliance verification should be confirmed with the manufacturer if RoHS certification is a design requirement.

Q: What is the Moisture Sensitivity Level (MSL) difference between the original and substitutes?

A: The original 74FCT240CTQG carries MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Both Texas Instruments substitutes carry MSL 2 (1 Year), requiring storage and handling within specified humidity conditions for one year from the date of manufacture. The Cypress option does not specify MSL in the provided data. MSL considerations should be evaluated based on storage duration and environmental conditions in your supply chain.