DM74LS03N NAND Gate IC Equivalent & Substitute Parts

Part Overview

The DM74LS03N is a 4-channel 2-input NAND gate IC with open collector output, manufactured by onsemi in a 14-MDIP package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The DM74LS03N operates within the standard 74LS logic family, which maintains consistent functional and electrical characteristics across manufacturers.

Substiute Parts

DM74LS03N

onsemiIn Stock: 1268DM74LS03N Datasheet

Current PartRFQ

SN74LS03N

Texas InstrumentsIn Stock: 2233SN74LS03N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74LS03N is determined by the following criteria:

Functional Equivalence: The substitute part must be a 4-channel 2-input NAND gate with open collector output, maintaining the same logic type and circuit configuration.

Electrical Compatibility: Supply voltage range (4.75V ~ 5.25V), input logic levels (Low: 0.8V, High: 2V), and operating temperature range (0°C ~ 70°C) must be identical or encompassing.

Package Compatibility: The 14-DIP (0.300", 7.62mm) package format ensures mechanical and pin-level compatibility with existing PCB layouts and sockets.

Series Alignment: Parts must belong to the 74LS logic family with the same base product number (74LS03) to ensure standardized performance characteristics.

The SN74LS03N from Texas Instruments meets all substitution criteria and is classified as an active product, providing long-term availability and supply chain reliability.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS03N from Texas Instruments is the direct functional equivalent for the obsolete DM74LS03N. Both parts share identical logic configuration, electrical specifications, and package format, ensuring pin-for-pin compatibility.

Product Status Consideration: The DM74LS03N is obsolete, while the SN74LS03N maintains active product status with established supply chain availability. For new designs and production continuity, the SN74LS03N is the appropriate selection.

Compliance Status: The SN74LS03N is ROHS3 compliant, whereas the DM74LS03N is RoHS non-compliant. Applications subject to RoHS regulations require the SN74LS03N.

Performance Characteristics: The SN74LS03N demonstrates improved propagation delay (32ns versus 45ns) and higher output current capability (16mA versus 8mA), providing enhanced performance margins in equivalent applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS03N directly replace the DM74LS03N without PCB modifications?

A: Yes. Both parts use the 14-DIP (0.300", 7.62mm) package with identical pin assignments. No PCB layout changes are required for direct substitution.

Q: Are there electrical differences that affect circuit operation?

A: Both parts operate within the same supply voltage range (4.75V ~ 5.25V) and maintain identical input logic levels. The SN74LS03N provides higher output current (16mA versus 8mA) and faster propagation delay (32ns versus 45ns), which are performance improvements compatible with existing designs.

Q: Why is the DM74LS03N classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The SN74LS03N from Texas Instruments remains in active production and serves as the industry-standard equivalent for the 74LS03 NAND gate function.

Q: What is the significance of RoHS compliance differences?

A: The SN74LS03N is ROHS3 compliant, meeting current environmental and hazardous substance restrictions. The DM74LS03N is RoHS non-compliant. Applications subject to RoHS regulations or customer requirements must use the SN74LS03N.

Q: Are there packaging options for the SN74LS03N?

A: The SN74LS03N is supplied in Tube packaging. The 14-PDIP package format maintains compatibility with the original 14-DIP specification.