PI74FCT240ATQ Equivalent & Substitute Parts

Part Overview

The PI74FCT240ATQ is an inverting buffer logic IC manufactured by Diodes Incorporated, designed for 5.25V operation with 2 elements and 4 bits per element in a 20-QSOP package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

PI74FCT240ATQ

Diodes IncorporatedIn Stock: 973PI74FCT240ATQ Datasheet

Current PartRFQ

CY74FCT244ATQCT

Texas InstrumentsIn Stock: 2067CY74FCT244ATQCT Datasheet

DirectRFQ

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

74FCT240CTQG

Renesas Electronics CorporationIn Stock: 190674FCT240CTQG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PI74FCT240ATQ are classified based on the following substitution criteria:

Direct Functional Equivalents maintain identical logic type (inverting buffer), element count (2), bit configuration (4 bits per element), output type (3-State), and supply voltage range (4.75V ~ 5.25V). These parts operate within the same electrical specifications and package footprint.

Key Parameters Determining Substitutability:

• Logic Type: Buffer, Inverting
• Number of Elements: 2
• Number of Bits per Element: 4
• 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)

Variations in output current specifications (15mA vs. 32mA for high output, 12mA vs. 64mA for low output) and product status (active vs. obsolete) do not prevent substitution when electrical requirements are met. Packaging format differences (Tape & Reel, Bulk, Tube) represent procurement variations only and do not affect functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

For Active Product Designs: CY74FCT240ATQCT (Texas Instruments) and CY74FCT2240CTQCT (Texas Instruments) are recommended as primary substitutes. Both parts are active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment. CY74FCT240ATQCT maintains identical inverting buffer logic and output current specifications (32mA high, 64mA low). CY74FCT2240CTQCT provides inverting buffer functionality with modified output current characteristics (15mA high, 12mA low), suitable for applications with reduced current requirements.

For Legacy System Support: 74FCT240CTQG (Renesas Electronics Corporation) serves as a parametric equivalent for designs requiring obsolete part replacement without redesign. This part maintains the original inverting buffer configuration and output current specifications (15mA high, 64mA low) with ROHS3 compliance.

Logic Type Consideration: CY74FCT244ATQCT (Texas Instruments) provides non-inverting buffer functionality instead of inverting. This part is not a direct substitute and requires circuit-level verification before implementation.

Compliance and Availability: Active product status combined with ROHS3 compliance ensures regulatory compliance and procurement continuity for new designs. Obsolete parts (PI74FCT240ATQ and 74FCT240CTQG) should be reserved for legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT244ATQCT replace PI74FCT240ATQ directly? A: No. CY74FCT244ATQCT is a non-inverting buffer, while PI74FCT240ATQ is an inverting buffer. Logic inversion differences require circuit verification and potential redesign.

Q: What is the primary difference between CY74FCT240ATQCT and CY74FCT2240CTQCT? A: Both are inverting buffers with identical element and bit configurations. CY74FCT240ATQCT provides 32mA high and 64mA low output current. CY74FCT2240CTQCT provides 15mA high and 12mA low output current. Selection depends on load current requirements.

Q: Are all substitute parts compatible with the original 20-SSOP package footprint? A: Yes. All listed substitutes use the 20-SSOP (0.154", 3.90mm Width) package, ensuring mechanical and electrical compatibility with existing PCB designs.

Q: What is the significance of product status (Active vs. Obsolete)? A: Active products ensure long-term availability and manufacturer support. Obsolete products may have limited stock and no future production. For new designs, active products are preferred.

Q: Does RoHS compliance affect functional substitution? A: RoHS compliance does not affect electrical function. However, ROHS3-compliant parts are required for designs meeting regulatory requirements. Non-compliant parts are restricted in certain markets and applications.

Q: Can packaging format (Tape & Reel, Bulk, Tube) affect substitution? A: Packaging format affects procurement and handling only. Electrical and mechanical compatibility remain unchanged. Selection depends on assembly process requirements and order quantities.

Q: What is Moisture Sensitivity Level (MSL) and why does it matter? A: MSL indicates the maximum time a component can be exposed to ambient conditions before soldering. MSL 1 (Unlimited) allows indefinite storage. MSL 2 (1 Year) requires controlled storage. Selection depends on inventory management and assembly schedules.