PI74FCT374ATQE Equivalent & Substitute Parts

Part Overview

The PI74FCT374ATQE is an 8-bit D-type flip-flop logic integrated circuit manufactured by Diodes Incorporated. This device functions as a parallel-load register with tri-state outputs, designed for digital logic applications requiring edge-triggered data capture and storage. The part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain functional equivalence across core electrical parameters and package specifications to ensure direct replacement capability.

Substiute Parts

PI74FCT374ATQE

Diodes IncorporatedIn Stock: 1051PI74FCT374ATQE Datasheet

Current PartRFQ

CY74FCT374ATQCT

Cypress Semiconductor CorpIn Stock: 2086CY74FCT374ATQCT Datasheet

MFR RecommendedRFQ

CY74FCT374TQCT

Texas InstrumentsIn Stock: 1004CY74FCT374TQCT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PI74FCT374ATQE are qualified based on the following criteria:

Functional Equivalence Requirements:

• Same base product number (74FCT374)
• Identical logic function: 8-bit D-type flip-flop with positive edge trigger
• Tri-state, non-inverted output configuration
• Single element, 8-bit architecture

Electrical Compatibility Requirements:

• Supply voltage range: 4.75V ~ 5.25V (identical)
• Operating temperature range: -40°C ~ 85°C (identical)
• Output type: Tri-state, non-inverted (identical)
• Trigger mechanism: Positive edge (identical)

Package Compatibility Requirements:

• Package type: 20-SSOP (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• Pin count and footprint: Identical

The substitute parts CY74FCT374ATQCT and CY74FCT374TQCT meet all functional, electrical, and package requirements for direct substitution with the PI74FCT374ATQE.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are qualified for direct replacement of the PI74FCT374ATQE based on functional and electrical equivalence within the 74FCT logic family.

CY74FCT374ATQCT (Cypress Semiconductor Corp): This part is active in production and maintains full functional compatibility. It demonstrates improved performance characteristics with lower propagation delay (6.2ns) and reduced quiescent current (200 µA versus 500 µA). RoHS and REACH compliance status are not specified in available documentation.

CY74FCT374TQCT (Texas Instruments): This part is active in production and maintains full functional compatibility. It carries ROHS3 compliance and REACH Unaffected status, matching the original part's regulatory certifications. Propagation delay is specified at 10ns, which is within acceptable tolerance for 74FCT logic applications. Quiescent current is reduced to 200 µA.

For applications requiring documented regulatory compliance (RoHS3 and REACH), the CY74FCT374TQCT from Texas Instruments is the preferred selection. For applications prioritizing performance optimization, the CY74FCT374ATQCT from Cypress Semiconductor offers superior propagation delay and power consumption characteristics.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT374ATQCT and CY74FCT374TQCT be used interchangeably with PI74FCT374ATQE?

A: Yes. Both substitute parts are functionally equivalent within the 74FCT logic family. They share identical pin configurations, package specifications (20-SSOP), supply voltage requirements (4.75V ~ 5.25V), operating temperature range (-40°C ~ 85°C), and logic function (8-bit D-type flip-flop with positive edge trigger and tri-state outputs). Direct PCB substitution is supported without design modification.

Q: What are the key differences between the two substitute parts?

A: The primary differences are manufacturer source and performance characteristics. CY74FCT374ATQCT offers faster propagation delay (6.2ns) and lower quiescent current (200 µA). CY74FCT374TQCT provides documented ROHS3 and REACH compliance certifications. Both maintain identical functional and electrical specifications required for substitution.

Q: Does the propagation delay difference between substitutes affect circuit performance?

A: The propagation delay specifications (6.2ns for CY74FCT374ATQCT and 10ns for CY74FCT374TQCT) are both within the 74FCT logic family standard performance envelope. Selection depends on specific timing requirements of the application. Both parts are suitable for standard digital logic applications operating within the specified temperature and voltage ranges.

Q: Are packaging and mounting specifications identical across all three parts?

A: Yes. All three parts use the 20-SSOP (0.154", 3.90mm Width) surface mount package with identical pin assignments and footprint requirements. No PCB layout modifications are necessary when substituting between these parts.

Q: What is the inventory status of these substitute parts?

A: CY74FCT374ATQCT has 1987 pieces in stock. CY74FCT374TQCT has 943 pieces in stock. Both are actively manufactured and available for procurement.