SN7406D Equivalent & Substitute Parts

Part Overview

The SN7406D is a 6-channel inverter logic IC with open collector outputs in a 14-SOIC surface mount package, manufactured by Texas Instruments as part of the 7400 series. This component is classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts is essential for design continuity, long-term supply chain planning, and ensuring project viability when the primary part reaches end-of-life status.

Substiute Parts

SN7406D

Texas InstrumentsIn Stock: 2399SN7406D Datasheet

Current PartRFQ

SN7406DR

Texas InstrumentsIn Stock: 24298SN7406DR Datasheet

MFR RecommendedRFQ

SN74LS05D

Texas InstrumentsIn Stock: 5981SN74LS05D Datasheet

MFR RecommendedRFQ

SN7406DG4

Texas InstrumentsIn Stock: 897SN7406DG4 Datasheet

Parametric EquivalentRFQ

SN7416D

Texas InstrumentsIn Stock: 846SN7416D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN7406D is determined by strict alignment with the following critical parameters:

• Logic Type: Inverter
• Number of Circuits: 6
• Number of Inputs: 1
• Features: Open Collector
• Voltage - Supply: 4.75V ~ 5.25V
• Current - Output High, Low: -, 40mA
• Input Logic Level - Low: 0.8V
• Input Logic Level - High: 2V
• Max Propagation Delay @ V, Max CL: 23ns @ 5V, 15pF
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 14-SOIC (0.154", 3.90mm Width)

All identified substitute parts meet these electrical and mechanical specifications. Substitutes are categorized as either MFR Recommended (manufacturer-endorsed alternatives) or Parametric Equivalents (functionally identical parts with identical electrical performance).

Parameter Comparison

Engineering Selection Recommendations

MFR Recommended Substitute: SN7406DR

The SN7406DR is the primary manufacturer-recommended alternative to the SN7406D. It maintains identical electrical specifications and 14-SOIC packaging. The key distinction is product status: SN7406DR is Active, ensuring continued availability and supply chain stability. The packaging format differs (Tape & Reel vs. Tube), which may affect procurement quantities and handling procedures but does not impact functional compatibility. Both parts are ROHS3 Compliant and REACH Unaffected.

Secondary Substitute: SN74LS05D

The SN74LS05D is an Active product offering identical electrical performance and 14-SOIC packaging. This part provides an alternative sourcing path with confirmed inventory availability. Packaging type is not specified in available documentation.

Parametric Equivalents: SN7406DG4 and SN7416D

Both SN7406DG4 and SN7416D are parametric equivalents with identical electrical specifications and 14-SOIC packaging. Both are classified as Last Time Buy, similar to the primary SN7406D. These parts are suitable for direct substitution but do not address supply continuity concerns associated with Last Time Buy status. SN7406DG4 shares the same base product number (SN7406) as the primary part, while SN7416D uses a different base product number (SN7416) but maintains full electrical and mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can SN7406DR be used as a direct replacement for SN7406D?

A: Yes. SN7406DR is electrically and mechanically identical to SN7406D. Both feature 6-channel inverter logic with open collector outputs, identical supply voltage range (4.75V ~ 5.25V), output current specifications (40mA), propagation delay (23ns @ 5V, 15pF), and 14-SOIC packaging. The primary difference is product status (Active vs. Last Time Buy) and packaging format (Tape & Reel vs. Tube).

Q: What is the difference between SN7406D and SN74LS05D?

A: Both parts are 6-channel inverters with open collector outputs in 14-SOIC packages and identical electrical specifications. The designation "LS" in SN74LS05D indicates Low-Power Schottky logic family, while SN7406D is standard 7400 series. Despite family differences, the provided electrical parameters are equivalent. SN74LS05D is Active, providing better long-term availability.

Q: Why are SN7406DG4 and SN7416D listed as substitutes if they are Last Time Buy?

A: SN7406DG4 and SN7416D are parametric equivalents with identical electrical and mechanical specifications. They are included as substitutes for applications requiring immediate component sourcing or where inventory is available. However, for long-term design continuity, SN7406DR or SN74LS05D are preferred due to Active product status.

Q: Does packaging format (Tube vs. Tape & Reel) affect electrical performance?

A: No. Packaging format affects procurement quantity, handling, and storage procedures but does not impact electrical performance or functional compatibility. SN7406D (Tube) and SN7406DR (Tape & Reel) are electrically identical.

Q: Are all substitute parts ROHS3 Compliant?

A: SN7406D, SN7406DR, SN7406DG4, and SN7416D are all ROHS3 Compliant. SN74LS05D compliance status is not specified in available documentation.

Q: What is the significance of Last Time Buy status?

A: Last Time Buy indicates the manufacturer will discontinue production after a specified date. Parts with this status have limited future availability. For design continuity, substitution to Active products (SN7406DR or SN74LS05D) is recommended for new designs or long-term applications.