CY74FCT652CTSOCE4 Equivalent & Substitute Parts

Part Overview

The CY74FCT652CTSOCE4 is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments, designed for 8-bit data bus applications with 3-state output capability. This device operates within the 4.75V to 5.25V supply voltage range and is housed in a 24-SOIC surface mount package.

The CY74FCT652CTSOCE4 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production and maintenance requirements for systems utilizing this transceiver.

Key Parameters

Parameter	Value
Manufacturer Part Number	CY74FCT652CTSOCE4
Manufacturer	Texas Instruments
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	32mA, 64mA
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	24-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the CY74FCT652CTSOCE4 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Parameters:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Current - Output High, Low: 32mA, 64mA
Voltage - Supply: 4.75V ~ 5.25V
Operating Temperature: -40°C ~ 85°C (TA)

Mechanical Parameters:

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

All substitute parts listed maintain identical electrical specifications and mechanical packaging, ensuring direct functional equivalence and PCB-level compatibility without design modification.

Parameter Comparison

Manufacturer Part Number	Product Status	Logic Type	Bits per Element	Output Type	Current Output (High/Low)	Supply Voltage	Operating Temp	Package	Inventory (Pcs)
CY74FCT652CTSOCE4	Obsolete	Transceiver, Non-Inverting	8	3-State	32mA, 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	24-SOIC	999
CY74FCT646CTSOC	Active	Transceiver, Non-Inverting	8	3-State	32mA, 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	24-SOIC	1482
CY29FCT52CTSOC	Active	Transceiver, Non-Inverting	8	3-State	32mA, 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	24-SOIC	1381
CY74FCT543ATSOC	Active	Transceiver, Non-Inverting	8	3-State	32mA, 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	24-SOIC	1418
CY74FCT543TSOC	Active	Transceiver, Non-Inverting	8	3-State	32mA, 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	24-SOIC	2122
CY74FCT646ATSOC	Active	Transceiver, Non-Inverting	8	3-State	32mA, 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	24-SOIC	2610
CY74FCT646TSOC	Active	Transceiver, Non-Inverting	8	3-State	32mA, 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	24-SOIC	1454
CY74FCT652ATSOC	Active	Transceiver, Non-Inverting	8	3-State	32mA, 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	24-SOIC	1924

Engineering Selection Recommendations

All substitute parts listed are manufactured by Texas Instruments and maintain ROHS3 compliance and REACH unaffected status, consistent with the original CY74FCT652CTSOCE4 device. The primary distinction between the main part and substitutes is product status: the original part is obsolete, while all listed alternatives carry active product status, ensuring ongoing manufacturer support and availability.

CY74FCT646CTSOC is designated as the manufacturer-recommended substitute, offering the highest compatibility assurance. The remaining parts are parametric equivalents with identical electrical and mechanical specifications, differing only in base product number designation and packaging tube configuration.

Selection among active alternatives should prioritize inventory availability and supply chain lead times, as all parts satisfy identical functional and compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT652ATSOC directly replace CY74FCT652CTSOCE4 on existing PCBs?

A: Yes. Both parts share identical electrical specifications (8-bit non-inverting transceiver, 3-state output, 32mA/64mA drive capability, 4.75V–5.25V supply) and mechanical packaging (24-SOIC surface mount). The difference is product status: CY74FCT652ATSOC is active, while CY74FCT652CTSOCE4 is obsolete. No PCB redesign is required.

Q: What is the difference between CY74FCT646CTSOC and CY74FCT646ATSOC?

A: Both are parametric equivalents with identical electrical and mechanical specifications. The difference is in the temperature grade designation within the part number suffix. Both operate across -40°C to 85°C and are packaged in 24-SOIC. Selection depends on inventory availability and supply chain requirements.

Q: Why is CY74FCT646CTSOC listed as the manufacturer-recommended substitute?

A: CY74FCT646CTSOC carries active product status and is explicitly designated as the manufacturer-recommended alternative in the substitution hierarchy. It maintains all electrical and mechanical parameters of the obsolete CY74FCT652CTSOCE4 while ensuring ongoing manufacturer support.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed—CY74FCT646CTSOC, CY29FCT52CTSOC, CY74FCT543ATSOC, CY74FCT543TSOC, CY74FCT646ATSOC, CY74FCT646TSOC, and CY74FCT652ATSOC—are ROHS3 compliant and REACH unaffected, matching the compliance profile of the original part.

Q: Can I use CY29FCT52CTSOC as a substitute?

A: Yes. CY29FCT52CTSOC is a parametric equivalent with identical electrical specifications and 24-SOIC packaging. The 29FCT series designation indicates a different product line within Texas Instruments' transceiver portfolio, but functional compatibility is maintained for this application.

Q: What is the moisture sensitivity level for substitute parts?

A: All substitute parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage, handling, or assembly. This matches the original CY74FCT652CTSOCE4 specification.

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