CY74FCT240CTQCTE4 Equivalent & Substitute Parts

Part Overview

The CY74FCT240CTQCTE4 is a Buffer, Inverting logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability. This component operates at 4.75V to 5.25V supply voltage with an operating temperature range of -40°C to 85°C. The part is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and procurement planning.

Substiute Parts

CY74FCT240CTQCTE4

Texas InstrumentsIn Stock: 1179CY74FCT240CTQCTE4 Datasheet

Current PartRFQ

CY74FCT240ATQCT

Texas InstrumentsIn Stock: 5660CY74FCT240ATQCT Datasheet

Parametric EquivalentRFQ

CY74FCT240TQCT

Cypress Semiconductor CorpIn Stock: 4179CY74FCT240TQCT Datasheet

Parametric EquivalentRFQ

74FCT240CTQG

Renesas Electronics CorporationIn Stock: 190674FCT240CTQG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CY74FCT240CTQCTE4 are identified based on strict parametric equivalence across the following critical criteria:

Electrical Parameters (Must Match):

• 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)
• Base Product Number: 74FCT240

Mechanical Parameters (Must Match):

• Package / Case: 20-SSOP (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Acceptable Variations:

• Packaging format (Tape & Reel, Bulk, Tube) does not affect electrical or mechanical compatibility
• Output current specifications may vary within the 74FCT240 series
• Product status (Active vs. Obsolete) does not affect functional equivalence
• Manufacturer differences are acceptable provided all electrical and mechanical parameters align

Parameter Comparison

Engineering Selection Recommendations

CY74FCT240ATQCT (Parametric Equivalent - Preferred)

This part is a parametric equivalent with identical electrical and mechanical specifications to the main part. It maintains the same output current ratings (32mA, 64mA), supply voltage range, and operating temperature. The part is currently in active production status, ensuring long-term availability. It carries ROHS3 compliance and MSL 2 rating matching the original specification. Packaging is available in Tape & Reel format.

CY74FCT240TQCT (Parametric Equivalent - Alternative)

This Cypress Semiconductor part provides identical electrical functionality with matching output current, voltage, and temperature specifications. It is in active production status. Packaging is available in Bulk format. RoHS and MSL specifications are not provided in the available data.

74FCT240CTQG (MFR Recommended - Limited Compatibility)

This Renesas part maintains electrical equivalence across logic type, element count, bit configuration, and output type. However, the output high current specification is reduced to 15mA compared to the 32mA of the main part. This represents a functional limitation in high-current output applications. The part is obsolete but carries MSL 1 rating (unlimited moisture sensitivity). Packaging is available in Tube format.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT240ATQCT be used as a direct replacement for CY74FCT240CTQCTE4?

A: Yes. CY74FCT240ATQCT is a parametric equivalent with identical electrical and mechanical specifications. The only difference is packaging format (Tape & Reel vs. the original format) and active product status, both of which do not affect functional compatibility.

Q: What is the significance of the output current difference in 74FCT240CTQG?

A: The 74FCT240CTQG specifies 15mA output high current versus 32mA in the main part. This reduced current capability may limit performance in applications requiring higher output drive current. System-level analysis is necessary to determine if this reduction is acceptable for the intended application.

Q: Are all substitute parts pin-compatible?

A: Yes. All substitute parts maintain the 20-SSOP package with identical pinout and mechanical dimensions (0.154", 3.90mm Width), ensuring direct PCB compatibility.

Q: Why is the main part classified as obsolete?

A: The CY74FCT240CTQCTE4 is marked obsolete by the manufacturer. Active alternatives such as CY74FCT240ATQCT are available to support ongoing procurement and system maintenance requirements.

Q: What is the difference between Tape & Reel and Bulk packaging?

A: Tape & Reel packaging is suitable for automated assembly processes, while Bulk packaging is typically used for manual assembly or lower-volume applications. Both formats contain electrically and mechanically identical components.

Q: Does RoHS compliance affect substitution decisions?

A: RoHS3 compliance is maintained across the primary substitute options (CY74FCT240ATQCT and 74FCT240CTQG), ensuring regulatory alignment with the original part specification.