54FCT373TDB D-Type Transparent Latch Equivalent & Substitute Parts

Part Overview

The 54FCT373TDB is a D-Type Transparent Latch IC manufactured by Renesas Electronics Corporation, designed for 8:8 multiplexing applications with tri-state output capability. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-CDIP package for through-hole mounting.

The 54FCT373TDB is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this logic component.

Substiute Parts

54FCT373TDB

Renesas Electronics CorporationIn Stock: 94854FCT373TDB Datasheet

Current PartRFQ

CY54FCT373ATDMB

Texas InstrumentsIn Stock: 1367CY54FCT373ATDMB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 54FCT373TDB is determined by strict alignment of the following critical parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Supply Voltage Range: 4.5V ~ 5.5V
• Independent Circuits: 1
• Operating Temperature Range: -55°C ~ 125°C
• Package / Case: 20-CDIP (0.300", 7.62mm)
• Mounting Type: Through Hole

Substitute parts must match all of these parameters to ensure functional and mechanical compatibility. Additional performance characteristics such as propagation delay and output current ratings may vary within acceptable engineering tolerances for the application.

Parameter Comparison

Engineering Selection Recommendations

The CY54FCT373ATDMB from Texas Instruments is a direct functional substitute for the 54FCT373TDB. Both components share identical logic type, circuit configuration, supply voltage range, operating temperature range, and package specifications.

The CY54FCT373ATDMB offers the advantage of active product status, ensuring ongoing availability and supply chain support. Additionally, this substitute part meets ROHS3 compliance requirements, whereas the original 54FCT373TDB is RoHS non-compliant. For new designs or systems requiring regulatory compliance, the CY54FCT373ATDMB is the appropriate selection.

The CY54FCT373ATDMB demonstrates improved propagation delay performance (9.8ns versus 15ns), which may provide marginal timing benefits in applications sensitive to signal propagation characteristics. Output current ratings are specified for the substitute part, enabling more precise circuit design validation.

Frequently Asked Questions (FAQ)

Q: Can the CY54FCT373ATDMB directly replace the 54FCT373TDB in existing designs?

A: Yes. Both components share identical logic type, circuit configuration, supply voltage range, operating temperature range, and 20-CDIP package specifications. Direct pin-for-pin substitution is supported.

Q: What is the significance of the "Non-Inverted" output specification for the CY54FCT373ATDMB?

A: The Non-Inverted designation indicates the output logic state relationship to the input. This is consistent with standard D-Type Transparent Latch operation and does not affect substitution compatibility with the original 54FCT373TDB.

Q: Does the improved propagation delay of the CY54FCT373ATDMB affect circuit compatibility?

A: The CY54FCT373ATDMB exhibits faster propagation delay (9.8ns) compared to the 54FCT373TDB (15ns). This represents improved performance and does not create compatibility issues. Circuits designed for the original part will function correctly with the faster substitute.

Q: Are there any compliance or regulatory differences between these parts?

A: The CY54FCT373ATDMB is ROHS3 compliant, while the 54FCT373TDB is RoHS non-compliant. For applications subject to RoHS regulations or environmental compliance requirements, the CY54FCT373ATDMB is the appropriate selection.

Q: Is the 20-CDIP package identical for both parts?

A: Yes. Both components use the 20-CDIP (0.300", 7.62mm) package with through-hole mounting. Physical and mechanical compatibility is confirmed.