CD74AC139M96 Equivalent & Substitute Parts

Part Overview

The CD74AC139M96 is a decoder/demultiplexer logic integrated circuit manufactured by Texas Instruments in the 74AC series. This device functions as a 1 x 2:4 decoder with dual independent circuits, designed for signal routing and selection applications in digital systems. The part is currently in active production status with 2070 units in stock. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and functional equivalence within the 74AC logic family.

Substiute Parts

CD74AC139M96

Texas InstrumentsIn Stock: 2081CD74AC139M96 Datasheet

Current PartRFQ

74AC139SC

Fairchild SemiconductorIn Stock: 981074AC139SC Datasheet

MFR RecommendedRFQ

74AC139SCX

Fairchild SemiconductorIn Stock: 3511574AC139SCX Datasheet

MFR RecommendedRFQ

MC74AC139DG

onsemiIn Stock: 1611MC74AC139DG Datasheet

MFR RecommendedRFQ

MC74AC139DR2G

onsemiIn Stock: 3782MC74AC139DR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74AC139M96 are qualified based on the following criteria:

Functional Equivalence: All substitute parts maintain identical circuit configuration (1 x 2:4 decoder/demultiplexer with 2 independent circuits) and output current specifications (24mA high/low).

Package Compatibility: All substitutes use the 16-SOIC surface mount package with 0.154" (3.90mm) width, ensuring mechanical and electrical pin compatibility.

Electrical Parameters: Substitute parts operate within overlapping voltage supply ranges and maintain the same logic family (74AC series). The CD74AC139M96 operates at 1.5V ~ 5.5V, while substitute parts from Fairchild Semiconductor and onsemi operate at 2V ~ 6V, providing functional compatibility within standard application ranges.

Series Consistency: All parts belong to the 74AC logic series, ensuring timing characteristics and logic level compatibility.

Compliance: Substitute parts maintain ROHS3 compliance and EAR99 export classification matching the original part.

Parameter Comparison

Engineering Selection Recommendations

Texas Instruments CD74AC139M96: Primary choice for applications requiring extended operating temperature range (-55°C to 125°C) and lower minimum supply voltage (1.5V). ROHS3 compliant with MSL 1 rating. Available in Cut Tape and Digi-Reel packaging.

Fairchild Semiconductor 74AC139SC and 74AC139SCX: Suitable for standard industrial temperature range applications (-40°C to 85°C). Both parts maintain identical electrical specifications and 16-SOIC package compatibility. 74AC139SCX offers higher inventory availability (35,026 units). Selection between these variants depends on packaging requirements (Bulk vs. unspecified).

onsemi MC74AC139DG and MC74AC139DR2G: Both onsemi variants provide ROHS3 compliance and MSL 1 rating matching the original part. MC74AC139DG is supplied in Tube packaging; MC74AC139DR2G is supplied in Tape & Reel format. Both operate within -40°C to 85°C temperature range. Selection depends on packaging and handling requirements for production environments.

Temperature Consideration: Applications requiring operation below -40°C or above 85°C must use the CD74AC139M96 from Texas Instruments, as all substitute parts are limited to -40°C to 85°C.

Supply Voltage Consideration: Applications operating below 2V must use the CD74AC139M96, which supports 1.5V minimum supply voltage.

Frequently Asked Questions (FAQ)

Q: Can 74AC139SC and 74AC139SCX be used interchangeably with CD74AC139M96?

A: Both Fairchild parts are functionally equivalent for applications within the -40°C to 85°C temperature range and 2V to 6V supply voltage range. Pin configuration, circuit function, and output current specifications are identical. Substitution is valid within these operating parameters.

Q: What is the difference between MC74AC139DG and MC74AC139DR2G?

A: Both onsemi parts are electrically identical. The primary difference is packaging: MC74AC139DG is supplied in Tube format, while MC74AC139DR2G is supplied in Tape & Reel format. Selection depends on production volume and handling requirements.

Q: Are all substitute parts ROHS3 compliant?

A: ROHS3 compliance is confirmed for CD74AC139M96, MC74AC139DG, and MC74AC139DR2G. Fairchild Semiconductor parts (74AC139SC and 74AC139SCX) do not have specified RoHS status in the provided data.

Q: What is the significance of the 16-SOIC package specification?

A: The 16-SOIC (Small Outline Integrated Circuit) package with 0.154" width is the standard surface mount package for all listed parts. This ensures mechanical and electrical compatibility across all substitutes without requiring PCB redesign or component rework.

Q: Can substitute parts be used in extended temperature applications?

A: No. Substitute parts from Fairchild Semiconductor and onsemi are rated for -40°C to 85°C operation. Applications requiring -55°C to 125°C operation must use the CD74AC139M96 from Texas Instruments.

Q: What does MSL 1 (Unlimited) moisture sensitivity level mean?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. This applies to CD74AC139M96, MC74AC139DG, and MC74AC139DR2G.