SN74F38D Equivalent & Substitute Parts

Part Overview

The SN74F38D is a NAND Gate IC featuring 4 channels with 2 inputs per channel in a 14-SOIC surface mount package. This component is classified as Last Time Buy, indicating discontinued production status. The open collector configuration provides flexibility for logic-level applications requiring active-low outputs. Identifying equivalent substitute parts is essential for design continuity and procurement planning when the original part reaches end-of-life status.

Substiute Parts

SN74F38D

Texas InstrumentsIn Stock: 2529SN74F38D Datasheet

Current PartRFQ

SN74F38DR

Texas InstrumentsIn Stock: 2618SN74F38DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74F38D is determined by strict equivalence across the following critical parameters:

• Logic function: NAND Gate with identical 4-channel, 2-input configuration
• Electrical characteristics: Supply voltage range (4.5V ~ 5.5V), output current capability (64mA), input logic thresholds (0.8V low, 2V high), and propagation delay (12.5ns @ 5V, 50pF)
• Output configuration: Open collector topology
• Package specification: 14-SOIC surface mount form factor with identical physical dimensions
• Compliance standards: ROHS3 compliance and MSL Level 1 rating

The SN74F38DR qualifies as a direct substitute based on identical electrical performance, functional configuration, and package specifications. The primary distinction is product status and packaging format availability.

Parameter Comparison

Engineering Selection Recommendations

The SN74F38DR is the manufacturer-recommended substitute for the SN74F38D. Both parts maintain identical electrical specifications, functional configuration, and package form factor. The SN74F38DR carries Active product status, ensuring continued availability and supply chain stability compared to the Last Time Buy status of the SN74F38D.

Both parts satisfy ROHS3 compliance requirements and MSL Level 1 moisture sensitivity specifications, making them suitable for equivalent applications without design modification. The packaging format difference (Tube versus Cut Tape & Digi-Reel) does not affect electrical or mechanical compatibility and reflects only distribution and procurement options.

Frequently Asked Questions (FAQ)

Q: Can the SN74F38DR directly replace the SN74F38D in existing designs?

A: Yes. The SN74F38DR provides identical electrical performance, logic function, and package specifications. No circuit modifications are required for substitution.

Q: What is the significance of the product status difference?

A: The SN74F38D is Last Time Buy, indicating production discontinuation. The SN74F38DR is Active, ensuring ongoing availability and supply continuity for new procurement and production runs.

Q: Are there packaging considerations for substitution?

A: Both parts use the 14-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm width). The packaging format difference (Tube versus Cut Tape & Digi-Reel) affects only distribution and handling but not electrical or mechanical compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN74F38D and SN74F38DR are ROHS3 compliant with MSL Level 1 rating, satisfying equivalent environmental and regulatory requirements.

Q: What are the critical electrical parameters that define substitution eligibility?

A: Supply voltage range (4.5V ~ 5.5V), output current capability (64mA), input logic thresholds (0.8V low, 2V high), and propagation delay (12.5ns @ 5V, 50pF) must remain identical. The SN74F38DR maintains all these specifications.