CY74FCT652CTSOC Equivalent & Substitute Parts

Part Overview

The CY74FCT652CTSOC is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments, classified within the 74FCT series. This device functions as a single-element, 8-bit transceiver with 3-state output capability, housed in a 24-SOIC surface-mount package. The part is currently obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Key Parameters

Parameter	Value
Manufacturer Part Number	CY74FCT652CTSOC
Manufacturer	Texas Instruments
Series	74FCT
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
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)
Mounting Type	Surface Mount
Package / Case	24-SOIC (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Part Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the CY74FCT652CTSOC is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
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)

Mechanical Compatibility Requirements:

Mounting Type: Surface Mount
Package / Case: 24-SOIC (0.295", 7.50mm Width)

Compliance Requirements:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain identical electrical specifications and mechanical form factors. Substitutes are differentiated by product status (active versus obsolete) and base product number variations within the 74FCT and 29FCT series families.

Parameter Comparison

Part Number	Manufacturer	Series	Logic Type	Elements	Bits/Element	Output Type	I_out High (mA)	I_out Low (mA)	V_supply (V)	Temp Range (°C)	Package	Status	Inventory (Pcs)
CY74FCT652CTSOC	Texas Instruments	74FCT	Transceiver, Non-Inverting	1	8	3-State	32	64	4.75 ~ 5.25	-40 ~ 85	24-SOIC	Obsolete	906
CY74FCT646CTSOC	Texas Instruments	74FCT	Transceiver, Non-Inverting	1	8	3-State	32	64	4.75 ~ 5.25	-40 ~ 85	24-SOIC	Active	1482
CY29FCT52CTSOC	Texas Instruments	29FCT	Transceiver, Non-Inverting	1	8	3-State	32	64	4.75 ~ 5.25	-40 ~ 85	24-SOIC	Active	1381
CY74FCT543ATSOC	Texas Instruments	74FCT	Transceiver, Non-Inverting	1	8	3-State	32	64	4.75 ~ 5.25	-40 ~ 85	24-SOIC	Active	1418
CY74FCT543TSOC	Texas Instruments	74FCT	Transceiver, Non-Inverting	1	8	3-State	32	64	4.75 ~ 5.25	-40 ~ 85	24-SOIC	Active	2122
CY74FCT646ATSOC	Texas Instruments	74FCT	Transceiver, Non-Inverting	1	8	3-State	32	64	4.75 ~ 5.25	-40 ~ 85	24-SOIC	Active	2610
CY74FCT646TSOC	Texas Instruments	74FCT	Transceiver, Non-Inverting	1	8	3-State	32	64	4.75 ~ 5.25	-40 ~ 85	24-SOIC	Active	1454
CY74FCT652ATSOC	Texas Instruments	74FCT	Transceiver, Non-Inverting	1	8	3-State	32	64	4.75 ~ 5.25	-40 ~ 85	24-SOIC	Active	1924

Engineering Selection Recommendations

Primary Recommendation: CY74FCT652ATSOC

The CY74FCT652ATSOC is the direct functional equivalent of the obsolete CY74FCT652CTSOC, maintaining identical electrical and mechanical specifications while offering active product status. This part shares the same base product number (74FCT652) and differs only in temperature grade designation. The CY74FCT652ATSOC is ROHS3 compliant and carries unlimited moisture sensitivity rating, ensuring compliance with current environmental and reliability standards.

Secondary Recommendations: CY74FCT646 Series

The CY74FCT646CTSOC, CY74FCT646ATSOC, and CY74FCT646TSOC variants provide parametric equivalence with active product status. These parts maintain all critical electrical and mechanical parameters while offering higher inventory availability (1482, 2610, and 1454 units respectively).

Alternative Recommendation: CY29FCT52CTSOC

The CY29FCT52CTSOC represents a parametric equivalent from the 29FCT series family. This part maintains all specified electrical characteristics and mechanical form factor while offering active product status and 1381 units in inventory.

Tertiary Recommendations: CY74FCT543 Series

The CY74FCT543ATSOC and CY74FCT543TSOC provide parametric equivalence with active product status and robust inventory levels (1418 and 2122 units respectively).

All recommended substitutes are ROHS3 compliant and carry MSL rating of 1 (Unlimited), ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT652ATSOC directly replace CY74FCT652CTSOC in existing designs?

A: Yes. The CY74FCT652ATSOC maintains identical electrical specifications (32mA/64mA output current, 4.75V–5.25V supply voltage, -40°C to 85°C operating range) and mechanical form factor (24-SOIC package). The parts differ only in temperature grade designation, with the ATSOC variant offering active product status.

Q: What is the difference between CY74FCT652CTSOC and CY74FCT646CTSOC?

A: Both parts are functionally equivalent non-inverting transceivers with identical electrical parameters and 24-SOIC packaging. The primary difference is the base product number (652 versus 646). The CY74FCT646CTSOC offers active product status and higher inventory availability (1482 units versus 906 units for the obsolete CY74FCT652CTSOC).

Q: Are all listed substitutes compatible with the same PCB footprint?

A: Yes. All substitute parts utilize the 24-SOIC (0.295", 7.50mm Width) package specification, ensuring mechanical and electrical compatibility with existing PCB designs without layout modifications.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts are ROHS3 compliant and carry REACH Unaffected status. Moisture sensitivity level is rated at 1 (Unlimited) for all parts, indicating no special moisture handling requirements during storage or assembly.

Q: Why are there multiple variants of the CY74FCT646 and CY74FCT543 series listed?

A: The variants differ in temperature grade designation (indicated by the suffix: C, A, or T). All variants maintain identical electrical specifications and mechanical form factors. Temperature grade variations allow selection based on specific application thermal requirements while maintaining parametric equivalence.

Q: Is the CY29FCT52CTSOC from a different manufacturer?

A: No. The CY29FCT52CTSOC is manufactured by Texas Instruments, the same manufacturer as the original part. The 29FCT series designation indicates a different product line within Texas Instruments' logic transceiver portfolio, but electrical and mechanical specifications remain equivalent to the 74FCT series.

Q: What inventory considerations should guide part selection?

A: Inventory levels vary across substitute options. The CY74FCT646ATSOC offers the highest availability (2610 units), followed by CY74FCT543TSOC (2122 units) and CY74FCT652ATSOC (1924 units). Selection should balance immediate availability requirements with long-term supply chain stability.

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