CY74FCT240CTSOCE4 Equivalent & Substitute Parts

Part Overview

The CY74FCT240CTSOCE4 is a Buffer, Inverting logic IC featuring 2 elements with 4 bits per element and 3-state output capability. Manufactured by Texas Instruments in the 74FCT series, this component operates at 4.75V to 5.25V supply voltage with output currents of 32mA (high) and 64mA (low). The device is packaged in a 20-SOIC form factor suitable for surface mount applications across industrial and commercial temperature ranges (-40°C to 85°C).

The CY74FCT240CTSOCE4 carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for systems utilizing this logic buffer component.

Key Parameters

Parameter	Value
Logic Type	Buffer, Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High	32mA
Current - Output Low	64mA
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CY74FCT240CTSOCE4 are identified based on strict electrical and mechanical parameter matching within the 74FCT logic series. The substitution criteria are:

Critical Parameters for Substitution:

Logic Type: Buffer, Inverting (2 elements, 4 bits per element)
Output Type: 3-State
Output Current Ratings: 32mA (high), 64mA (low)
Supply Voltage Range: 4.75V ~ 5.25V
Operating Temperature Range: -40°C ~ 85°C
Package: 20-SOIC form factor
Base Product Number: 74FCT240

The identified substitutes maintain identical electrical specifications and mechanical compatibility. Differences exist only in product status (Active vs. Obsolete) and packaging format (Tube vs. standard packaging), which do not affect functional interchangeability in circuit applications.

Parameter Comparison

Parameter	CY74FCT240CTSOCE4 (Main)	CY74FCT240TSOC (Substitute 1)	CY74FCT240ATSOC (Substitute 2)
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Series	74FCT	74FCT	74FCT
Logic Type	Buffer, Inverting	Buffer, Inverting	Buffer, Inverting
Number of Elements	2	2	2
Number of Bits per Element	4	4	4
Output Type	3-State	3-State	3-State
Current - Output High, Low	32mA, 64mA	32mA, 64mA	32mA, 64mA
Voltage - Supply	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both CY74FCT240TSOC and CY74FCT240ATSOC are functionally equivalent to the CY74FCT240CTSOCE4 and provide direct substitution capability for new designs and production continuity.

CY74FCT240TSOC is designated as the MFR Recommended substitute. This part carries Active product status, ensuring long-term availability and ongoing manufacturer support. It maintains full electrical and mechanical compatibility with identical output current specifications, supply voltage range, and operating temperature parameters.

CY74FCT240ATSOC is identified as a Parametric Equivalent substitute. This part also carries Active product status with identical electrical and mechanical specifications. Both substitute options are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Selection between the two active substitutes should be based on packaging format availability (Tube) and inventory requirements, as both provide equivalent functional performance and compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT240TSOC or CY74FCT240ATSOC be used as direct replacements for CY74FCT240CTSOCE4?

A: Yes. Both substitute parts maintain identical electrical specifications including output current ratings (32mA high, 64mA low), supply voltage range (4.75V ~ 5.25V), operating temperature range (-40°C ~ 85°C), and 3-state output functionality. The 20-SOIC package dimensions are identical, enabling direct PCB-level substitution.

Q: What is the difference between the two substitute parts?

A: CY74FCT240TSOC and CY74FCT240ATSOC are parametrically identical. Both are Active products from Texas Instruments with the same electrical and mechanical specifications. Differences are limited to packaging format designation (Tube) and inventory availability.

Q: Why is the original part marked as Obsolete?

A: The CY74FCT240CTSOCE4 carries Obsolete status, indicating Texas Instruments has discontinued active production and support. The identified Active substitutes ensure continued access to functionally equivalent components for ongoing system support and new production builds.

Q: Are there any compliance or certification differences between the main part and substitutes?

A: No. All three parts are ROHS3 Compliant, REACH Unaffected, and carry MSL Level 1 (Unlimited) moisture sensitivity ratings. Compliance certifications are identical across the main part and both substitutes.

Q: What package considerations apply to these parts?

A: All three parts use the 20-SOIC surface mount package with identical dimensions (0.295" width, 7.50mm). No package-related design modifications are required when substituting between these parts.

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