54FCT373ATDB Equivalent & Substitute Parts

Part Overview

The 54FCT373ATDB 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 maintains performance across the industrial temperature spectrum of -55°C to 125°C.

Substiute Parts

54FCT373ATDB

Renesas Electronics CorporationIn Stock: 92354FCT373ATDB Datasheet

Current PartRFQ

CY54FCT373ATDMB

Texas InstrumentsIn Stock: 1367CY54FCT373ATDMB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 54FCT373ATDB is determined by strict equivalence across the following critical parameters:

• Logic Type & Circuit Configuration: D-Type Transparent Latch with 8:8 circuit must be maintained
• Output Characteristics: Tri-State output capability required
• Electrical Specifications: Supply voltage range 4.5V ~ 5.5V and propagation delay of 9.8ns
• Package Compatibility: 20-CDIP (0.300", 7.62mm) through-hole mounting
• Temperature Range: Operating range -55°C ~ 125°C

The CY54FCT373ATDMB from Texas Instruments meets all substitution criteria, offering functional and electrical equivalence with the added benefit of active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The CY54FCT373ATDMB represents the primary substitute for the obsolete 54FCT373ATDB. Selection of this alternative is justified on the following engineering grounds:

Functional Equivalence: Both parts maintain identical logic type, circuit configuration, output characteristics, and electrical performance specifications across the specified operating range.

Product Lifecycle Status: The CY54FCT373ATDMB carries active product status, ensuring continued availability and manufacturer support, whereas the 54FCT373ATDB is obsolete and subject to supply discontinuation.

Compliance & Certification: The Texas Instruments part achieves ROHS3 compliance, meeting current regulatory requirements for electronic component manufacturing and environmental standards. The Renesas part is RoHS non-compliant.

Electrical Performance: Both parts deliver identical propagation delay (9.8ns) and supply voltage specifications. The Texas Instruments part provides specified output current ratings (12mA high, 32mA low), enabling precise circuit design validation.

Package Compatibility: Identical 20-CDIP through-hole packaging ensures direct mechanical and electrical compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the CY54FCT373ATDMB be used as a direct replacement for the 54FCT373ATDB?

A: Yes. Both parts are electrically and mechanically equivalent across all critical parameters: logic type, circuit configuration, tri-state output, supply voltage range, propagation delay, operating temperature, and 20-CDIP package. Direct substitution is supported without circuit modification.

Q: What is the significance of "Non-Inverted" output in the Texas Instruments part specification?

A: The CY54FCT373ATDMB specifies non-inverted tri-state output, indicating standard logic polarity. This is the expected output configuration for D-Type Transparent Latch circuits and does not represent a functional difference from the Renesas part.

Q: Does the RoHS compliance difference affect substitution compatibility?

A: RoHS compliance is a manufacturing and environmental standard, not a functional specification. The CY54FCT373ATDMB's ROHS3 compliance indicates adherence to current regulatory requirements and does not impact electrical or mechanical compatibility with existing designs.

Q: Are the output current specifications (12mA, 32mA) critical for substitution?

A: Output current ratings define the part's drive capability. The Texas Instruments specification provides explicit current values, enabling precise circuit design validation. The Renesas part does not specify these values. Both parts operate within the same voltage and temperature parameters, supporting equivalent circuit performance.

Q: Is the 20-CDIP package suitable for modern PCB assembly?

A: The 20-CDIP is a through-hole package. Both the 54FCT373ATDB and CY54FCT373ATDMB use identical package dimensions (0.300", 7.62mm), ensuring compatibility with existing through-hole PCB designs and assembly processes.

Q: What should be verified before implementing the CY54FCT373ATDMB in production?

A: Verify that the circuit design accommodates the specified output current ratings (12mA, 32mA) and that the non-inverted output polarity aligns with system logic requirements. Confirm PCB through-hole pad compatibility with the 20-CDIP package dimensions.