SN7406NS Equivalent & Substitute Parts

Part Overview

The SN7406NS is a 6-channel inverter IC with open collector outputs manufactured by Texas Instruments in a 14-SO surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited availability. The SN7406NS features 6 independent inverter circuits with open collector configuration, making it suitable for applications requiring active-low output control and current sinking capability. Due to its Last Time Buy status, identifying compatible substitute parts is essential for design continuity and long-term supply chain planning.

Substiute Parts

SN7406NS

Texas InstrumentsIn Stock: 4190SN7406NS Datasheet

Current PartRFQ

SN7406NSR

Texas InstrumentsIn Stock: 6899SN7406NSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the SN7406NS is determined by the following critical parameters:

Core Functional Parameters:

• Logic Type: Inverter
• Number of Circuits: 6
• Features: Open Collector output configuration
• Voltage Supply Range: 4.75V ~ 5.25V
• Input Logic Levels: Low 0.8V, High 2V
• Output Current Capability: 40mA (Low)
• Propagation Delay: 23ns @ 5V, 15pF

Physical & Environmental Parameters:

• Package Type: 14-SOIC surface mount
• Operating Temperature Range: 0°C ~ 70°C
• RoHS Compliance: ROHS3 Compliant
• Moisture Sensitivity: MSL 1

The SN7406NSR qualifies as a manufacturer-recommended substitute based on matching core electrical specifications, identical package configuration, and equivalent environmental compliance ratings. Both devices maintain the same supply voltage range, input/output logic levels, propagation delay characteristics, and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

SN7406NSR as Primary Substitute:

The SN7406NSR is the manufacturer-recommended substitute for the SN7406NS. Both devices are manufactured by Texas Instruments and share identical electrical specifications across all critical parameters including logic type, circuit count, output configuration, supply voltage range, input/output logic levels, propagation delay, and operating temperature range.

Compliance & Certification Alignment:

Both the SN7406NS and SN7406NSR maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, ensuring equivalent environmental and regulatory compliance for applications subject to RoHS directives and moisture-sensitive device handling requirements.

Product Status Consideration:

The SN7406NS carries Last Time Buy status with 4,100 pieces in stock, while the SN7406NSR is classified as Active with 6,795 pieces available. For new designs or long-term production requirements, the SN7406NSR provides superior supply chain continuity and availability assurance.

Packaging Format Difference:

The primary distinction between these parts is packaging format. The SN7406NS is supplied in tube packaging, while the SN7406NSR is supplied in Tape & Reel (TR) format. This difference affects handling, storage, and automated assembly processes but does not impact electrical performance or functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SN7406NSR directly replace the SN7406NS in existing designs?

A: Yes. The SN7406NSR is electrically and functionally identical to the SN7406NS. All critical parameters including logic type, circuit count, open collector configuration, supply voltage, input/output logic levels, propagation delay, and operating temperature range are identical. Direct substitution is supported at the component level.

Q: What is the difference between SN7406NS and SN7406NSR?

A: The primary difference is packaging format. The SN7406NS is supplied in tube packaging, while the SN7406NSR is supplied in Tape & Reel (TR) format. Electrical specifications and functional performance are identical. The packaging difference affects procurement, storage, and assembly processes but not circuit performance.

Q: Why is the SN7406NS marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part number. Existing inventory is available for purchase, but no future production is planned. The SN7406NSR, classified as Active, represents the current production equivalent and is recommended for new designs and ongoing supply requirements.

Q: Are there any compatibility concerns when switching from SN7406NS to SN7406NSR?

A: No compatibility concerns exist at the electrical or functional level. Both devices operate within identical voltage ranges (4.75V ~ 5.25V), accept the same input logic levels (Low 0.8V, High 2V), and deliver identical output current (40mA) and propagation delay (23ns @ 5V, 15pF). PCB footprint compatibility is confirmed by identical 14-SOIC package specifications.

Q: Does the Tape & Reel packaging of SN7406NSR affect circuit performance?

A: No. Tape & Reel packaging is a supply format that affects handling and automated assembly processes but does not alter electrical characteristics, performance specifications, or functional behavior. The device operates identically regardless of packaging format.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN7406NS and SN7406NSR are ROHS3 compliant and carry MSL 1 moisture sensitivity rating, meeting equivalent environmental and regulatory requirements for RoHS-restricted applications.

Q: What is the base product number for these parts?

A: The base product number is SN7406, which identifies the core 6-channel inverter IC family. The NS and NSR suffixes indicate specific packaging and supply format variations of the same base product.