SN74LS05NS Equivalent & Substitute Parts

Part Overview

The SN74LS05NS is a 6-channel inverter IC with open collector output configuration, manufactured by Texas Instruments in 14-SO surface mount packaging. This logic component operates within the 74LS series standard and is classified as Last Time Buy, indicating discontinued production with limited remaining inventory. Substitute parts are necessary to ensure design continuity and long-term component availability for new production runs and system maintenance.

Substiute Parts

SN74LS05NS

Texas InstrumentsIn Stock: 2100SN74LS05NS Datasheet

Current PartRFQ

SN74LS05NSR

Texas InstrumentsIn Stock: 2864SN74LS05NSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS05NS is based on strict equivalence across the following critical parameters:

• Logic function: 6-channel inverter with open collector output
• Electrical specifications: 4.75V ~ 5.25V supply voltage, 8mA output current, 32ns propagation delay
• Package compatibility: 14-SOIC surface mount form factor
• Environmental compliance: ROHS3 compliance, MSL Level 1, REACH unaffected status

The SN74LS05NSR qualifies as a direct substitute based on identical electrical performance, matching package specifications, and equivalent compliance certifications. The primary distinction is product status: SN74LS05NSR maintains Active status with higher inventory availability, whereas SN74LS05NS is Last Time Buy.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS05NSR is the manufacturer-recommended substitute for the SN74LS05NS. Both components maintain identical electrical and mechanical specifications, ensuring direct functional equivalence in circuit applications. Selection between these parts should be based on availability and production timeline requirements. The SN74LS05NSR, with Active product status and higher inventory levels, is suitable for new designs and ongoing production. The SN74LS05NS, designated Last Time Buy, remains available for existing designs requiring component continuity but should not be selected for new development. Both parts satisfy ROHS3 compliance and REACH requirements, making either suitable for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can SN74LS05NSR be used as a direct replacement for SN74LS05NS in existing designs?

A: Yes. Both parts are electrically and mechanically identical, with matching supply voltage ranges, output current specifications, propagation delay characteristics, and 14-SOIC packaging. No circuit modifications are required.

Q: What is the difference between these two part numbers?

A: The primary difference is product lifecycle status. SN74LS05NS is Last Time Buy with limited remaining inventory, while SN74LS05NSR is Active with higher stock availability. Electrical performance and package specifications are identical.

Q: Are there any input logic level differences between these parts?

A: The SN74LS05NS specifies Input Logic Level - Low as 0.4V ~ 0.5V with Input Logic Level - High not specified. The SN74LS05NSR specifies Input Logic Level - Low as 0.8V and Input Logic Level - High as 2V. Both operate within standard 74LS logic thresholds and are functionally compatible.

Q: Which part should be selected for new production designs?

A: The SN74LS05NSR should be selected for new designs due to its Active status and higher inventory availability, ensuring long-term supply chain stability.

Q: Are both parts RoHS compliant?

A: Yes. Both SN74LS05NS and SN74LS05NSR are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH unaffected status.

Q: Is the 14-SOIC package identical for both parts?

A: Yes. Both parts use the 14-SOIC (0.209", 5.30mm Width) surface mount package with identical pinout and mechanical dimensions.