74FCT373ATSOG Equivalent & Substitute Parts

Part Overview

The 74FCT373ATSOG is a D-Type Transparent Latch logic IC manufactured by Renesas Electronics Corporation, configured as a single channel 8:8 multiplexer with tri-state output in a 20-SOIC surface mount package. This component is classified as Last Time Buy, indicating end-of-life status from the original manufacturer. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this device.

Substiute Parts

74FCT373ATSOG

Renesas Electronics CorporationIn Stock: 136674FCT373ATSOG Datasheet

Current PartRFQ

CY74FCT373ATSOC

Texas InstrumentsIn Stock: 2976CY74FCT373ATSOC Datasheet

MFR RecommendedRFQ

CY74FCT373ATSOCT

Texas InstrumentsIn Stock: 742CY74FCT373ATSOCT Datasheet

MFR RecommendedRFQ

CY74FCT373TSOC

Texas InstrumentsIn Stock: 2264CY74FCT373TSOC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74FCT373ATSOG are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Compatibility Criteria:

• Logic Type: D-Type Transparent Latch (identical function)
• Circuit Configuration: 8:8 (identical channel count and multiplexing ratio)
• Output Type: Tri-State (identical output control capability)
• Supply Voltage Range: 4.75V ~ 5.25V (identical operating voltage)
• Propagation Delay Time: 2ns (identical timing specification)
• Operating Temperature Range: -40°C ~ 85°C (identical thermal operating window)
• Independent Circuits: 1 (identical circuit count)

Mechanical Compatibility Criteria:

• Package Type: 20-SOIC (0.295", 7.50mm Width) (identical footprint and pinout)
• Mounting Type: Surface Mount (identical assembly method)

Compliance Criteria:

• RoHS3 Compliance (environmental regulatory alignment)
• Moisture Sensitivity Level 1 (identical handling requirements)
• REACH Unaffected status (identical regulatory classification)

All substitute parts listed maintain identical electrical function, mechanical compatibility, and regulatory compliance with the 74FCT373ATSOG. Variations in output current capacity (15mA/48mA vs. 32mA/64mA) represent enhanced performance characteristics that do not compromise substitution validity.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute Recommendation: CY74FCT373ATSOC (Texas Instruments) is the preferred substitute for the 74FCT373ATSOG. This part maintains Active product status, ensuring long-term availability and manufacturer support. It provides identical electrical and mechanical specifications with enhanced output current capacity (32mA/64mA vs. 15mA/48mA), representing a performance upgrade without functional compromise. Current inventory of 2952 units supports immediate procurement requirements.

Secondary Substitute Recommendation: CY74FCT373TSOC (Texas Instruments) is an alternative substitute with Active product status and 2250 units in inventory. This part is functionally equivalent to CY74FCT373ATSOC with identical electrical specifications and packaging.

Tertiary Substitute Recommendation: CY74FCT373ATSOCT (Texas Instruments) is available as a substitute option; however, this part is classified as Discontinued at DiGi Electronics, indicating limited future availability. Current inventory of 719 units may support immediate requirements but does not guarantee long-term supply continuity.

All three Texas Instruments substitutes maintain ROHS3 compliance, Moisture Sensitivity Level 1, and REACH Unaffected status, ensuring regulatory alignment with the original 74FCT373ATSOG specification.

Frequently Asked Questions (FAQ)

Q: Can the CY74FCT373ATSOC directly replace the 74FCT373ATSOG without circuit modification? A: Yes. The CY74FCT373ATSOC maintains identical electrical specifications (supply voltage, propagation delay, operating temperature range, logic function, and tri-state output configuration) and identical mechanical specifications (20-SOIC package, surface mount footprint, and pinout). Direct substitution is supported without circuit redesign.

Q: What is the significance of the higher output current ratings (32mA/64mA) in the Texas Instruments substitutes compared to the original 15mA/48mA specification? A: The higher output current capacity in the Texas Instruments parts represents enhanced drive capability. This does not create incompatibility; rather, it provides additional performance margin for applications requiring higher output current. Existing circuit designs will operate within the enhanced specifications without modification.

Q: Why is CY74FCT373ATSOCT marked as Discontinued at DiGi Electronics despite being functionally equivalent? A: CY74FCT373ATSOCT is discontinued from DiGi Electronics's distribution channel but may remain available through other authorized distributors or direct manufacturer channels. For new designs or long-term supply assurance, CY74FCT373ATSOC or CY74FCT373TSOC are recommended due to their Active product status.

Q: Are all substitute parts RoHS3 compliant and suitable for regulated applications? A: Yes. All substitute parts listed (CY74FCT373ATSOC, CY74FCT373ATSOCT, and CY74FCT373TSOC) are ROHS3 Compliant, REACH Unaffected, and classified as Moisture Sensitivity Level 1. They meet the same environmental and regulatory requirements as the original 74FCT373ATSOG.

Q: What is the difference between CY74FCT373ATSOC and CY74FCT373TSOC? A: Both parts are functionally and electrically identical with identical output current specifications (32mA/64mA), propagation delay (2ns), and operating parameters. The primary difference is packaging designation: CY74FCT373ATSOC is specified as Tube packaging, while CY74FCT373TSOC is also specified as Tube packaging. Both are suitable for direct substitution.