CY74FCT138CTSOCT Equivalent & Substitute Parts

Part Overview

The CY74FCT138CTSOCT is a Decoder/Demultiplexer logic IC manufactured by Texas Instruments, featuring a 1 x 3:8 circuit configuration in a 16-SOIC surface mount package. This part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support and procurement planning. Substitute parts maintain identical electrical and mechanical specifications while offering improved availability through active product status alternatives.

Substiute Parts

CY74FCT138CTSOCT

Texas InstrumentsIn Stock: 815CY74FCT138CTSOCT Datasheet

Current PartRFQ

CY74FCT138ATSOCT

Texas InstrumentsIn Stock: 1895CY74FCT138ATSOCT Datasheet

Parametric EquivalentRFQ

CY74FCT138ATSOC

Texas InstrumentsIn Stock: 1603CY74FCT138ATSOC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CY74FCT138CTSOCT are qualified based on strict equivalence across the following critical parameters:

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

The identified substitutes differ only in packaging format (Tape & Reel or Tube) and product status (Active vs. Obsolete), with all electrical and mechanical parameters held constant. These variations do not affect functional compatibility in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both CY74FCT138ATSOCT and CY74FCT138ATSOC are direct functional equivalents to the obsolete CY74FCT138CTSOCT. Selection between these substitutes should be based on procurement requirements and supply chain considerations:

CY74FCT138ATSOCT is available in Tape & Reel packaging, suitable for high-volume automated assembly operations. CY74FCT138ATSOC is available in Tube packaging, appropriate for lower-volume or manual assembly processes. Both parts maintain active product status with Texas Instruments, ensuring long-term availability and technical support. All three parts carry identical ROHS3 compliance and REACH unaffected certifications, meeting environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT138ATSOCT and CY74FCT138ATSOC be used interchangeably with CY74FCT138CTSOCT?

A: Yes. All three parts share identical electrical specifications, circuit configuration, package dimensions, and operating parameters. The only differences are product status and packaging format, which do not affect functional compatibility.

Q: What is the difference between Tape & Reel and Tube packaging?

A: Tape & Reel packaging is designed for automated pick-and-place assembly equipment, while Tube packaging is used for manual handling and lower-volume applications. Both formats contain the same component with identical electrical performance.

Q: Why is the main part listed as obsolete?

A: Obsolete status indicates that Texas Instruments has discontinued active production and support for the CY74FCT138CTSOCT. The active substitute parts (CY74FCT138ATSOCT and CY74FCT138ATSOC) provide continued availability and manufacturer support.

Q: Are there any compliance differences between the main part and substitutes?

A: No. All three parts are ROHS3 compliant and REACH unaffected, meeting identical environmental and regulatory standards.

Q: What parameters must remain constant for substitution?

A: Circuit configuration (1 x 3:8), voltage supply range (4.75V ~ 5.25V), output current ratings (32mA/64mA), operating temperature range (-40°C ~ 85°C), and 16-SOIC package dimensions must all remain constant for functional equivalence.