SN7404D Equivalent & Substitute Parts

Part Overview

The SN7404D is a 6-channel inverter logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This component performs basic logic inversion operations and is classified as Last Time Buy, indicating discontinued production with limited remaining inventory. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this device.

Substiute Parts

SN7404D

Texas InstrumentsIn Stock: 919SN7404D Datasheet

Current PartRFQ

SN7404DR

Texas InstrumentsIn Stock: 2542SN7404DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN7404D is determined by strict equivalence across the following critical parameters:

• Logic Type: Must be Inverter with 6 channels and 1 input per channel
• Electrical Specifications: Voltage supply range (4.75V ~ 5.25V), output current ratings (400µA, 16mA), input logic levels (0.8V low, 2V high), and propagation delay (22ns @ 5V, 15pF) must be identical
• Package Compatibility: 14-SOIC surface mount package with 0.154" width (3.90mm)
• Compliance: RoHS3 compliance and MSL Level 1 rating required
• Operating Temperature: 0°C ~ 70°C range

The SN7404DR qualifies as a direct substitute based on complete electrical and mechanical parameter equivalence. The primary distinction is packaging format (Tape & Reel versus Tube) and product status (Active versus Last Time Buy).

Parameter Comparison

Engineering Selection Recommendations

The SN7404DR is a direct functional and electrical equivalent to the SN7404D. Both parts maintain identical electrical performance specifications and comply with ROHS3 and REACH requirements. The SN7404DR carries Active product status with higher inventory availability (2500 pcs versus 900 pcs), making it the preferred selection for new designs and ongoing production requirements. The SN7404D, designated as Last Time Buy, should be reserved for applications with existing inventory commitments or where Tube packaging is specifically required. Both parts are MSL Level 1 rated, eliminating moisture sensitivity concerns during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can SN7404DR be used as a direct replacement for SN7404D in existing designs?

A: Yes. The SN7404DR is electrically and mechanically equivalent. All electrical parameters, logic function, package dimensions, and compliance certifications are identical. The only difference is packaging format (Tape & Reel versus Tube) and product lifecycle status.

Q: What is the significance of the packaging format difference between Tube and Tape & Reel?

A: Tube packaging is typically used for lower-volume orders and manual assembly processes. Tape & Reel packaging is standard for automated pick-and-place assembly. The choice depends on manufacturing process requirements. Both formats contain the same component in the same 14-SOIC package.

Q: Why is SN7404D marked as Last Time Buy?

A: Last Time Buy designation indicates Texas Instruments has discontinued this product line. Existing inventory is available for a limited time. The SN7404DR, with Active status, represents the current production equivalent and should be used for new designs and long-term supply planning.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts have identical voltage supply ranges, output current ratings, input logic levels, propagation delay specifications, and operating temperature ranges. They are functionally interchangeable.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SN7404D and SN7404DR are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 rating. Compliance certifications are identical.