SN74F138NG4 Equivalent & Substitute Parts

Part Overview

The SN74F138NG4 is a Decoder/Demultiplexer logic IC with 1 x 3:8 circuit configuration, manufactured by Texas Instruments in a 16-PDIP package. This component is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and production needs. The part operates on single supply voltage and is suitable for applications requiring address decoding and demultiplexing functions in digital logic systems.

Substiute Parts

SN74F138NG4

Texas InstrumentsIn Stock: 1083SN74F138NG4 Datasheet

Current PartRFQ

SN74F138N

Texas InstrumentsIn Stock: 4457SN74F138N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74F138NG4 is determined by strict equivalence across the following critical parameters:

• Base Product Number: Must be 74F138 to ensure identical logic function and pin configuration
• Circuit Configuration: Must be 1 x 3:8 decoder/demultiplexer
• Package Type: Must be 16-DIP (0.300", 7.62mm) for mechanical and electrical compatibility
• Voltage Supply Range: Must be 4.5V ~ 5.5V
• Current Specifications: Output High/Low must be 1mA, 20mA
• Operating Temperature Range: Must be 0°C ~ 70°C
• Mounting Type: Must be Through Hole

The SN74F138N meets all substitution criteria and is the manufacturer-recommended equivalent part.

Parameter Comparison

Engineering Selection Recommendations

The SN74F138N is the direct substitute for the SN74F138NG4. Both parts are manufactured by Texas Instruments with identical electrical and mechanical specifications. The primary distinction is product status: the SN74F138NG4 is discontinued, while the SN74F138N remains in active production with 4400 units in stock.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility. The SN74F138N is available in Tube packaging, providing standard component handling and storage conditions suitable for production environments.

Frequently Asked Questions (FAQ)

Q: Can the SN74F138N directly replace the SN74F138NG4 in existing designs?

A: Yes. Both parts share identical electrical characteristics, pin configuration, and package dimensions. No circuit modifications are required.

Q: What is the difference between the NG4 and N suffixes?

A: The suffix designates packaging and distribution format. NG4 indicates a specific packaging variant that is now discontinued. The N suffix represents the current active production variant.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and classified under the same ECCN and HTSUS codes.

Q: What is the current availability status?

A: The SN74F138NG4 is discontinued. The SN74F138N is actively produced with 4400 units in stock.

Q: Are the operating temperature ranges identical?

A: Yes. Both parts operate across 0°C to 70°C, ensuring equivalent thermal performance in target applications.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. The 16-DIP package dimensions (0.300", 7.62mm) and through-hole mounting type are identical, allowing direct PCB footprint compatibility.