54FCT373CTDB Equivalent & Substitute Parts

Part Overview

The 54FCT373CTDB is a D-Type Transparent Latch logic IC manufactured by Renesas Electronics Corporation, featuring an 8:8 circuit configuration with tri-state output capability in a 20-CDIP package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The part operates within a 4.5V to 5.5V supply voltage range and is suitable for through-hole mounting applications requiring transparent latch functionality.

Substiute Parts

54FCT373CTDB

Renesas Electronics CorporationIn Stock: 78554FCT373CTDB Datasheet

Current PartRFQ

CY54FCT373ATDMB

Texas InstrumentsIn Stock: 1367CY54FCT373ATDMB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 54FCT373CTDB is determined by strict equivalence across the following parameters:

• Logic Type & Circuit Configuration: Must be D-Type Transparent Latch with 8:8 circuit
• Output Characteristics: Tri-state output capability required
• Voltage Compatibility: Supply voltage range 4.5V ~ 5.5V
• Package Compatibility: 20-CDIP form factor for through-hole mounting
• Operating Temperature Range: -55°C ~ 125°C minimum
• Independent Circuits: Single channel configuration

The CY54FCT373ATDMB from Texas Instruments meets all substitution criteria. This part maintains functional equivalence while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The CY54FCT373ATDMB is a direct functional substitute for the 54FCT373CTDB. Both parts share identical logic type, circuit configuration, output type, supply voltage range, operating temperature range, and package form factor. The substitute part offers the advantage of active product status, ensuring continued availability and manufacturing support. Additionally, the CY54FCT373ATDMB carries ROHS3 compliance, meeting modern environmental and regulatory requirements that the obsolete 54FCT373CTDB does not satisfy. The propagation delay differential of 1.8ns (9.8ns versus 8ns) remains within acceptable tolerances for most D-Type transparent latch applications operating at standard logic speeds.

Frequently Asked Questions (FAQ)

Q: Can the CY54FCT373ATDMB directly replace the 54FCT373CTDB in existing designs?

A: Yes. Both parts maintain identical logic type, circuit configuration, tri-state output capability, 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 propagation delay difference?

A: The CY54FCT373ATDMB exhibits a propagation delay of 9.8ns compared to the 54FCT373CTDB at 8ns. This 1.8ns difference is typical between different manufacturers' implementations of the same logic function and does not affect compatibility in standard logic applications.

Q: Why is the 54FCT373CTDB classified as obsolete?

A: Renesas Electronics Corporation has discontinued this part number. The CY54FCT373ATDMB from Texas Instruments provides equivalent functionality with active product status and current manufacturing support.

Q: Are there compliance differences between these parts?

A: Yes. The CY54FCT373ATDMB is ROHS3 compliant, while the 54FCT373CTDB is RoHS non-compliant. For applications subject to environmental regulations or customer requirements mandating RoHS compliance, the Texas Instruments substitute is the appropriate selection.

Q: Does the 20-CDIP package remain the same for both parts?

A: Yes. Both parts use the 20-CDIP (0.300", 7.62mm) through-hole package, ensuring mechanical and electrical compatibility in PCB layouts designed for the original 54FCT373CTDB.