PI74FCT373TQE Equivalent & Substitute Parts

Part Overview

The PI74FCT373TQE is a D-Type Transparent Latch logic IC manufactured by Diodes Incorporated, featuring an 8:8 circuit configuration with tri-state output in a 20-QSOP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The part operates within a 4.75V to 5.25V supply voltage range and is suitable for applications requiring transparent latch functionality with tri-state output capability.

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
Delay Time - Propagation	1.5ns
Current - Output High, Low	15mA, 64mA
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	20-SSOP (0.154", 3.90mm Width)
Supplier Device Package	20-QSOP

Substitute Part Grouping Explanation

Substitution for the PI74FCT373TQE is determined by strict equivalence across 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
Operating Temperature Range: -40°C ~ 85°C
Mounting Type: Surface Mount
Package Type: 20-QSOP or 20-SSOP

Substitute parts must maintain compatibility across all these parameters. Variations in propagation delay time and output current ratings are permissible within the functional specifications of the 74FCT logic family, provided the substitute part meets or exceeds the performance requirements of the original design.

Parameter Comparison

Parameter	PI74FCT373TQE (Main)	74FCT373CTQG	74FCT373CTPYG	CY74FCT373ATQCT	CY74FCT573ATQCT
Manufacturer	Diodes Incorporated	IDT	IDT	Texas Instruments	Cypress Semiconductor
Product Status	Obsolete	Active	Active	Active	Active
Logic Type	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch
Circuit Configuration	8:8	8:8	8:8	8:8	8:8
Output Type	Tri-State	Tri-State	Tri-State	Tri-State	Tri-State
Voltage - Supply	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V
Delay Time - Propagation	1.5ns	2ns	2ns	2ns	2ns
Current - Output High, Low	15mA, 64mA	15mA, 48mA	15mA, 48mA	32mA, 64mA	32mA, 64mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	20-SSOP (0.154", 3.90mm Width)	20-SSOP (0.154", 3.90mm Width)	20-SSOP (0.209", 5.30mm Width)	20-SSOP (0.154", 3.90mm Width)	20-SSOP (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant	Not specified	Not specified	ROHS3 Compliant	Not specified

Engineering Selection Recommendations

For applications currently using the obsolete PI74FCT373TQE, the following active substitute parts are available:

74FCT373CTQG (IDT) and CY74FCT373ATQCT (Texas Instruments) are direct pin-compatible replacements with identical 20-QSOP packaging (0.154", 3.90mm width). Both maintain the same operating temperature range and supply voltage specifications. CY74FCT373ATQCT carries ROHS3 compliance certification and MSL Level 2 rating, suitable for moisture-sensitive applications.

74FCT373CTPYG (IDT) provides functional equivalence with a wider 20-SSOP package (0.209", 5.30mm width), requiring PCB layout modification for implementation.

CY74FCT573ATQCT (Cypress Semiconductor) offers an alternative base product number (74FCT573) while maintaining identical electrical specifications and 20-SSOP packaging. This part is suitable for applications where the 74FCT573 variant is acceptable.

All substitute parts maintain ROHS3 compliance or equivalent environmental standards and are currently in active production status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the PI74FCT373TQE be directly replaced with any of the listed substitutes?

A: Direct pin-compatible replacement is possible with 74FCT373CTQG and CY74FCT373ATQCT, both featuring identical 20-QSOP packaging. The 74FCT373CTPYG requires PCB layout modification due to different package width specifications.

Q: What is the difference between the 74FCT373 and 74FCT573 base product numbers?

A: Both are D-Type Transparent Latch ICs with 8:8 configuration and tri-state output. The CY74FCT573ATQCT uses the 74FCT573 base product number but maintains electrical and functional equivalence with the 74FCT373 series for this application.

Q: Are there differences in propagation delay between the main part and substitutes?

A: The PI74FCT373TQE specifies 1.5ns propagation delay, while all listed substitutes specify 2ns. This 0.5ns difference remains within acceptable tolerances for 74FCT logic family applications and does not affect functional compatibility.

Q: Which substitute part offers the best compliance certifications?

A: CY74FCT373ATQCT (Texas Instruments) carries ROHS3 compliance and MSL Level 2 rating, making it suitable for moisture-sensitive manufacturing environments and applications with strict environmental compliance requirements.

Q: Does package width affect electrical performance?

A: Package width does not affect electrical performance. The 74FCT373CTPYG with 0.209" width operates identically to the 0.154" width variants. Package selection is determined by PCB layout constraints and available footprint space.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message