SN54HC139J Equivalent & Substitute Parts

Part Overview

The SN54HC139J is a dual 2-line to 4-line decoder/demultiplexer manufactured by Texas Instruments, classified as a logic component in the 54HC series. This device functions as a decoder/demultiplexer with a 1 x 2:4 circuit configuration and two independent circuits. The part is currently in active production status with 1,177 pieces available in new original inventory. Alternative models are identified to support applications requiring different operating temperature ranges, packaging formats, or supply chain flexibility while maintaining functional equivalence.

Substiute Parts

SN54HC139J

Texas InstrumentsIn Stock: 1254SN54HC139J Datasheet

Current PartRFQ

SN74HC139N

Texas InstrumentsIn Stock: 9861SN74HC139N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN54HC139J is determined by the following critical parameters:

• Functional Equivalence: Decoder/demultiplexer type with 1 x 2:4 circuit configuration and 2 independent circuits
• Electrical Compatibility: Output current ratings (5.2mA high/low), single supply voltage source, and supply voltage range (2V ~ 6V)
• Mechanical Compatibility: Through-hole mounting type with 16-pin DIP package format (0.300" pitch, 7.62mm)
• Compliance Requirements: ROHS3 compliance and REACH unaffected status

The SN74HC139N qualifies as a functional substitute based on matching decoder/demultiplexer architecture, identical output current specifications, compatible voltage supply parameters, and equivalent through-hole DIP packaging. The primary distinction is the operating temperature range, which differs between the two parts.

Parameter Comparison

Engineering Selection Recommendations

Both the SN54HC139J and SN74HC139N are active production components with ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current applications. Selection between these parts depends on operating temperature requirements: the SN54HC139J supports extended temperature operation from -55°C to 125°C, while the SN74HC139N operates within the range of -40°C to 85°C. For applications requiring the full military or extended industrial temperature specification, the SN54HC139J is the appropriate selection. For standard commercial temperature range applications, the SN74HC139N provides functional equivalence with higher inventory availability (9,800 pieces versus 1,177 pieces).

Frequently Asked Questions (FAQ)

Q: Can the SN74HC139N replace the SN54HC139J in all applications?

A: Functional replacement is possible only when the application operating temperature range does not exceed -40°C to 85°C. The SN54HC139J supports extended temperature operation to -55°C and 125°C. If your application requires operation outside the SN74HC139N temperature range, the SN54HC139J must be used.

Q: Are the package formats interchangeable?

A: Both parts use 16-pin DIP packages with 0.300" (7.62mm) pitch and through-hole mounting. The SN54HC139J uses CDIP (ceramic DIP) packaging while the SN74HC139N uses PDIP (plastic DIP) packaging. Both are mechanically and electrically compatible for standard through-hole PCB assembly.

Q: What are the key electrical parameters that determine substitution eligibility?

A: The critical electrical parameters are the decoder/demultiplexer circuit configuration (1 x 2:4), output current ratings (5.2mA high and low), single supply voltage source, and supply voltage range (2V to 6V). Both parts match these specifications exactly.

Q: Do both parts meet current compliance requirements?

A: Yes. Both the SN54HC139J and SN74HC139N are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Q: What is the primary difference between these two parts?

A: The primary difference is the operating temperature range. The SN54HC139J is rated for -55°C to 125°C (military/extended industrial grade), while the SN74HC139N is rated for -40°C to 85°C (commercial grade). All other electrical and mechanical parameters are identical.