DS26LS31N Equivalent & Substitute Parts

Part Overview

The DS26LS31N is a 4/0 Driver RS422/RS485 interface IC manufactured by Texas Instruments in a 16-DIP package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. The part operates within a 4.5V to 5.5V supply voltage range and supports through-hole mounting applications requiring RS422 or RS485 protocol communication.

Substiute Parts

DS26LS31N

Texas InstrumentsIn Stock: 922DS26LS31N Datasheet

Current PartRFQ

LTC486CN#PBF

Analog Devices Inc.In Stock: 1299LTC486CN#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS26LS31N is determined by strict alignment of the following electrical and mechanical parameters:

• Protocol Compatibility: Both main and substitute parts must support RS422 and RS485 protocols
• Driver/Receiver Configuration: 4/0 driver configuration must be maintained
• Package Type: 16-DIP (0.300", 7.62mm) through-hole mounting required
• Supply Voltage Range: Operating voltage specifications must be compatible with system design
• Operating Temperature Range: 0°C to 70°C minimum requirement
• Pin Count and Pinout: 16-pin DIP package ensures mechanical and electrical compatibility

The LTC486CN#PBF from Analog Devices Inc. meets all substitution criteria as an active product with identical protocol support, driver configuration, package type, and pin count.

Parameter Comparison

Engineering Selection Recommendations

The LTC486CN#PBF is the qualified substitute for the obsolete DS26LS31N. Selection is based on the following engineering criteria:

• Product Status: The LTC486CN#PBF maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete DS26LS31N
• Compliance: The LTC486CN#PBF achieves ROHS3 compliance, meeting modern regulatory requirements for new designs and system upgrades
• Regulatory Alignment: Both parts maintain identical REACH and ECCN classifications, ensuring consistent export and regulatory compliance
• Electrical Compatibility: Supply voltage ranges overlap within the 4.75V to 5.25V window, compatible with standard 5V system designs
• Mechanical Compatibility: Identical 16-DIP package and pinout ensure direct board-level substitution without layout modifications

Frequently Asked Questions (FAQ)

Q: Can the LTC486CN#PBF be used as a direct replacement for the DS26LS31N?

A: Yes. Both parts share identical protocol support (RS422/RS485), driver configuration (4/0), package type (16-DIP), and pin count. The LTC486CN#PBF can be substituted without circuit redesign or PCB layout changes.

Q: What is the difference in supply voltage specifications?

A: The DS26LS31N operates at 4.5V to 5.5V, while the LTC486CN#PBF operates at 4.75V to 5.25V. The LTC486CN#PBF range is narrower but fully compatible with standard 5V supply systems. Systems operating at the extremes of the DS26LS31N range (below 4.75V or above 5.25V) require voltage verification before substitution.

Q: Why is the DS26LS31N obsolete?

A: The DS26LS31N is classified as obsolete by Texas Instruments. The LTC486CN#PBF from Analog Devices Inc. is an active product with equivalent functionality and specifications, making it the appropriate choice for new designs and system maintenance.

Q: Are there packaging differences between these parts?

A: Both parts use 16-PDIP packaging in a 16-DIP (0.300", 7.62mm) form factor. The LTC486CN#PBF is supplied in tube packaging, while the DS26LS31N packaging specification was not provided. Both are through-hole mount components with identical pin spacing and mechanical compatibility.

Q: What compliance certifications should I consider?

A: The LTC486CN#PBF is ROHS3 compliant, making it suitable for applications requiring modern environmental compliance. Both parts are REACH unaffected and classified as EAR99 for export purposes. For new designs, the ROHS3 compliance of the LTC486CN#PBF is advantageous.