CY74FCT138ATSOCG4 Equivalent & Substitute Parts

Part Overview

The CY74FCT138ATSOCG4 is a Decoder/Demultiplexer logic IC with a 1 x 3:8 circuit configuration in a 16-SOIC surface mount package. This part is discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and procurement. The functional characteristics and electrical specifications remain consistent across qualified substitutes, enabling direct replacement in existing designs.

Substiute Parts

CY74FCT138ATSOCG4

Texas InstrumentsIn Stock: 976CY74FCT138ATSOCG4 Datasheet

Current PartRFQ

CY74FCT138ATSOC

Texas InstrumentsIn Stock: 1603CY74FCT138ATSOC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CY74FCT138ATSOCG4 is determined by strict equivalence across the following critical parameters:

• Circuit configuration (1 x 3:8 decoder/demultiplexer function)
• Electrical specifications (voltage supply 4.75V ~ 5.25V, output current ratings 32mA/64mA)
• Package type (16-SOIC surface mount)
• Operating temperature range (-40°C ~ 85°C)
• Compliance certifications (ROHS3, REACH Unaffected)

The substitute part CY74FCT138ATSOC meets all these criteria and shares the same base product number (74FCT138), confirming functional and electrical equivalence.

Parameter Comparison

Engineering Selection Recommendations

The CY74FCT138ATSOC is the qualified substitute for the discontinued CY74FCT138ATSOCG4. Both parts are manufactured by Texas Instruments and share identical electrical specifications, circuit configuration, and package geometry. The substitute maintains active product status, ensuring continued availability and supply chain reliability. Both parts meet ROHS3 compliance and REACH requirements, supporting regulatory obligations in current manufacturing environments. The packaging difference (tube versus the original specification) does not affect functional or electrical compatibility in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT138ATSOC be used as a direct replacement for CY74FCT138ATSOCG4?

A: Yes. Both parts are electrically and functionally equivalent. They share identical circuit configuration (1 x 3:8 decoder/demultiplexer), voltage supply specifications (4.75V ~ 5.25V), output current ratings (32mA/64mA), operating temperature range (-40°C ~ 85°C), and 16-SOIC package dimensions. No circuit modifications are required.

Q: Are there any differences in compliance or certifications?

A: No. Both parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating. Regulatory and environmental requirements are identical.

Q: What is the significance of the packaging difference?

A: The main part specifies a specific packaging format (indicated by the "G4" suffix), while the substitute uses tube packaging. This difference affects only procurement and handling procedures, not electrical performance or circuit compatibility.

Q: Why is the original part discontinued?

A: Product discontinuation is a manufacturer decision unrelated to technical performance. The substitute part maintains active status and provides equivalent functionality for ongoing designs and production requirements.