74FCT573CTSOG8 Equivalent & Substitute Parts

Part Overview

The 74FCT573CTSOG8 is a D-Type Transparent Latch logic IC manufactured by Renesas Electronics Corporation, featuring an 8:8 circuit configuration with tri-state output capability. This component operates within the 4.75V to 5.25V supply voltage range and is housed in a 20-SOIC surface mount package. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this logic function.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage - Supply	4.75V ~ 5.25V
Independent Circuits	1
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74FCT573CTSOG8 are qualified based on the following critical parameters:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Supply Voltage Range: 4.75V ~ 5.25V
Package: 20-SOIC surface mount
Operating Temperature Range: -40°C ~ 85°C
Compliance: ROHS3 Compliant, REACH Unaffected

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in propagation delay time and output current ratings are permissible within the 74FCT logic family, as these parameters do not affect functional interchangeability in standard latch applications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Delay Time - Propagation	Current - Output High / Low	Inventory (Pcs)
74FCT573CTSOG8	Renesas Electronics	Last Time Buy	Tape & Reel (TR)	1.5ns	15mA / 48mA	901
CY74FCT2573CTSOC	Texas Instruments	Active	Tube	1.5ns	15mA / 12mA	1673
CY74FCT573ATSOC	Texas Instruments	Active	Tube	2ns	32mA / 64mA	2120
CY74FCT573ATSOCT	Texas Instruments	Active	Tape & Reel (TR)	2ns	32mA / 64mA	2200
CY74FCT573CTSOC	Texas Instruments	Active	Tube	2ns	32mA / 64mA	3198
CY74FCT573TSOC	Texas Instruments	Active	Tube	2ns	32mA / 64mA	1058
CY74FCT573TSOCT	Texas Instruments	Discontinued at DiGi Electronics	-	2ns	32mA / 64mA	1146

Engineering Selection Recommendations

For applications currently using the 74FCT573CTSOG8, the following selection criteria apply:

Active Product Status Priority: CY74FCT573ATSOCT and CY74FCT573CTSOC are recommended as primary substitutes due to their Active product status and continuous availability. Both parts maintain full electrical compatibility and ROHS3 compliance.

Packaging Consideration: CY74FCT573ATSOCT is supplied in Tape & Reel format, matching the original part's packaging specification. CY74FCT573CTSOC is supplied in Tube format and requires packaging format verification before implementation.

Performance Characteristics: CY74FCT2573CTSOC offers the closest propagation delay match (1.5ns) to the original part. CY74FCT573ATSOC, CY74FCT573CTSOC, and CY74FCT573TSOC operate at 2ns propagation delay, which is acceptable for most latch applications within the 74FCT logic family.

Discontinued Parts: CY74FCT573TSOCT is discontinued at DiGi Electronics and should not be selected for new designs despite current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74FCT573CTSOG8 with any of the listed substitutes?

A: Yes, all listed active substitute parts maintain the same logic type, circuit configuration, output type, supply voltage range, package footprint, and operating temperature range. Electrical and mechanical interchangeability is confirmed.

Q: Does the propagation delay difference between 1.5ns and 2ns affect compatibility?

A: Propagation delay variations within the 74FCT logic family do not affect functional interchangeability in standard latch applications. Selection depends on specific timing requirements of your circuit design.

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

A: Tape & Reel packaging is used for automated assembly processes, while Tube packaging is used for manual handling and lower-volume applications. Both formats contain the same die and are electrically identical. Verify your assembly process requirements before selecting packaging format.

Q: Why is CY74FCT573TSOCT listed if it is discontinued?

A: CY74FCT573TSOCT is included for reference purposes only, as it appears in the original substitute list. Current inventory exists but the part is discontinued at DiGi Electronics. This part should not be selected for new designs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant and REACH unaffected, matching the environmental compliance status of the original 74FCT573CTSOG8.

Q: Which substitute offers the best inventory availability?

A: CY74FCT573CTSOC offers the highest current inventory at 3,198 pieces, followed by CY74FCT573ATSOCT at 2,200 pieces.

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