PI74FCT2373ATQ Equivalent & Substitute Parts

Part Overview

The PI74FCT2373ATQ is a D-Type Transparent Latch logic IC manufactured by Diodes Incorporated, featuring an 8:8 multiplexing configuration with tri-state output capability in a 20-QSOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates within the 74FCT logic family standard, which defines compatibility parameters across multiple manufacturers.

Substiute Parts

PI74FCT2373ATQ

Diodes IncorporatedIn Stock: 754PI74FCT2373ATQ Datasheet

Current PartRFQ

CY74FCT2573ATQCT

Texas InstrumentsIn Stock: 1641CY74FCT2573ATQCT Datasheet

DirectRFQ

74FCT2373ATQG

IDT, Integrated Device Technology IncIn Stock: 1917274FCT2373ATQG Datasheet

MFR RecommendedRFQ

74FCT2373ATQG8

Renesas Electronics CorporationIn Stock: 144674FCT2373ATQG8 Datasheet

MFR RecommendedRFQ

CY74FCT373ATQCT

Texas InstrumentsIn Stock: 5232CY74FCT373ATQCT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PI74FCT2373ATQ is determined by strict adherence to the following parameters:

• Logic Type & Circuit Configuration: All substitutes must be D-Type Transparent Latch devices with 8:8 configuration
• Output Type: Tri-state output capability is required
• Supply Voltage: 4.75V ~ 5.25V operating range must be maintained
• Operating Temperature: -40°C ~ 85°C range must be supported
• Package / Case: 20-SSOP form factor with 0.154" (3.90mm) width
• Mounting Type: Surface mount technology

The following parts meet these substitution criteria:

1. CY74FCT2573ATQCT (Texas Instruments) - Direct functional equivalent with active product status
2. 74FCT2373ATQG (IDT, Integrated Device Technology Inc) - Manufacturer-recommended equivalent with active status
3. 74FCT2373ATQG8 (Renesas Electronics Corporation) - Manufacturer-recommended equivalent with active status
4. CY74FCT373ATQCT (Texas Instruments) - Compatible substitute with enhanced output current specifications

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility)

CY74FCT2573ATQCT and 74FCT2373ATQG8 are the preferred substitutes for the obsolete PI74FCT2373ATQ. Both maintain identical propagation delay specifications (1.5ns and 2ns respectively) and output current ratings. CY74FCT2573ATQCT offers active product status with ROHS3 compliance and is available in cut tape packaging. 74FCT2373ATQG8 provides ROHS3 compliance with unlimited moisture sensitivity rating and tape & reel packaging.

Secondary Substitute (Enhanced Performance)

CY74FCT373ATQCT from Texas Instruments provides enhanced output current capability (32mA high, 64mA low) compared to the original specification (15mA high, 12mA low). This part is suitable for applications requiring higher drive capability while maintaining all other functional parameters. ROHS3 compliance and active product status support long-term availability.

Compliance Considerations

The original PI74FCT2373ATQ is RoHS non-compliant. All active substitute parts (CY74FCT2573ATQCT, 74FCT2373ATQG8, CY74FCT373ATQCT) are ROHS3 compliant, supporting modern procurement and environmental standards. REACH status is unaffected across all parts.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT2573ATQCT directly replace PI74FCT2373ATQ in existing designs?

A: Yes. CY74FCT2573ATQCT maintains identical logic type, circuit configuration, output type, supply voltage range, operating temperature range, and package specifications. The 1.5ns propagation delay and output current ratings are equivalent.

Q: What is the difference between 74FCT2373ATQG and 74FCT2373ATQG8?

A: Both parts are functionally equivalent D-Type Transparent Latch 8:8 devices from the 74FCT series. The primary difference is packaging: 74FCT2373ATQG is supplied in bulk, while 74FCT2373ATQG8 is supplied in tape & reel format. Propagation delay is 2ns for both, compared to 1.5ns for the original part.

Q: Why does CY74FCT373ATQCT have higher output current ratings?

A: CY74FCT373ATQCT is specified with 32mA high and 64mA low output current, compared to 15mA and 12mA in the original part. This represents a different device variant within the 74FCT family that maintains all other functional parameters while providing enhanced drive capability for applications requiring higher current output.

Q: Are all substitute parts available in the same 20-SSOP package?

A: Yes. All substitute parts use the 20-SSOP (0.154", 3.90mm Width) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts.

Q: What is the impact of the 2ns propagation delay in 74FCT2373ATQG and 74FCT2373ATQG8 compared to the 1.5ns original specification?

A: The 0.5ns increase in propagation delay is within typical design margins for 74FCT logic applications. System-level timing analysis is required to confirm compatibility with specific circuit requirements.

Q: Which substitute part has the best long-term availability?

A: 74FCT2373ATQG from IDT shows the highest inventory level (19,145 pcs) and active product status, supporting long-term procurement continuity.