DM74LS51N Equivalent & Substitute Parts

Part Overview

The DM74LS51N is a 14-pin DIP AND/OR/INVERT gate logic integrated circuit manufactured by onsemi. This component features 2 configurable circuits with 10 total inputs (3, 3, 2, 2 configuration) and single-ended output. The device operates within the 74LS logic family standard.

The DM74LS51N is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, maintenance, and repair applications.

Substiute Parts

DM74LS51N

onsemiIn Stock: 2243DM74LS51N Datasheet

Current PartRFQ

SN74LS51N

Texas InstrumentsIn Stock: 2528SN74LS51N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74LS51N is determined by strict equivalence across the following critical parameters:

• Logic Type: AND/OR/INVERT Gate configuration
• Number of Circuits: 2 circuits
• Input Configuration: 10 inputs with 3, 3, 2, 2 distribution
• Output Type: Single-Ended
• Electrical Characteristics: Output current (400µA high, 8mA low), supply voltage (4.75V ~ 5.25V)
• Operating Temperature Range: 0°C ~ 70°C
• Physical Package: 14-DIP form factor with 0.300" (7.62mm) pitch
• Series Compatibility: 74LS logic family

Substitute parts must match all parameters listed above to ensure functional and physical compatibility without circuit redesign or board modification.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS51N manufactured by Texas Instruments is a direct functional equivalent to the DM74LS51N. Both devices are identical in logic configuration, electrical performance, and physical package specifications.

The SN74LS51N carries Active product status, ensuring ongoing availability and supply chain continuity. The DM74LS51N is classified as Obsolete, making the SN74LS51N the preferred selection for new designs and component replenishment.

Both parts maintain REACH Unaffected status and EAR99 export classification, with identical HTSUS commodity codes. The SN74LS51N is RoHS3 Compliant, providing additional environmental compliance assurance for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS51N replace the DM74LS51N without circuit modification?

A: Yes. The SN74LS51N is a direct substitute. All electrical parameters, logic configuration, input/output characteristics, and physical package dimensions are identical. No circuit redesign or board layout changes are required.

Q: Are there differences in package specifications between these parts?

A: Both parts use 14-DIP packaging with 0.300" (7.62mm) pitch. The DM74LS51N is supplied in 14-MDIP format, while the SN74LS51N is supplied in 14-PDIP format. Both formats are mechanically and electrically compatible 14-DIP packages suitable for through-hole mounting.

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

A: The DM74LS51N is Obsolete, indicating onsemi has discontinued production. The SN74LS51N is Active, meaning Texas Instruments continues manufacturing and supporting this component. For ongoing production requirements, the Active status of the SN74LS51N ensures reliable supply availability.

Q: Are compliance certifications equivalent between the two parts?

A: Yes. Both parts share identical REACH Unaffected status and EAR99 export classification. The SN74LS51N additionally carries RoHS3 Compliance certification, providing enhanced environmental compliance documentation.

Q: What are the critical parameters that must match for substitution?

A: Substitution requires matching: logic type (AND/OR/INVERT Gate), circuit count (2), input configuration (10 inputs with 3, 3, 2, 2 distribution), output type (Single-Ended), electrical characteristics (400µA/8mA output current, 4.75V-5.25V supply), operating temperature range (0°C-70°C), and physical package (14-DIP, 0.300" pitch). All parameters are identical between the DM74LS51N and SN74LS51N.