DM74LS75N Equivalent & Substitute Parts

Part Overview

The DM74LS75N is a D-Type Transparent Latch quad bistable logic integrated circuit manufactured by onsemi in a 16-DIP package. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design requirements and production continuity. The part operates within the 74LS logic family standard and provides tri-state output capability for digital logic applications requiring latching functionality.

Substiute Parts

DM74LS75N

onsemiIn Stock: 1113DM74LS75N Datasheet

Current PartRFQ

SN74LS75N

Texas InstrumentsIn Stock: 5345SN74LS75N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DM74LS75N is determined by the following critical parameters:

• Logic Family & Type: Both parts must be D-Type Transparent Latch circuits within the 74LS logic family
• Package Compatibility: Physical package must be 16-DIP (0.300", 7.62mm) for direct board-level replacement
• Voltage Supply Range: Operating voltage must be 4.75V ~ 5.25V to ensure circuit compatibility
• Mounting Type: Through Hole mounting required for PCB compatibility
• Operating Temperature Range: 0°C ~ 70°C operational window must be maintained

The SN74LS75N manufactured by Texas Instruments meets all substitution criteria as an active product within the same logic family, package specification, and electrical operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS75N is a direct functional equivalent to the DM74LS75N for applications requiring D-Type Transparent Latch functionality in 16-DIP through-hole packages. The primary advantage of selecting the SN74LS75N is its active product status, ensuring long-term availability and supply chain continuity. Additionally, the SN74LS75N carries ROHS3 compliance certification, meeting modern environmental and regulatory standards, whereas the DM74LS75N is RoHS non-compliant. Both parts share identical electrical operating parameters, voltage supply ranges, and package specifications, enabling direct substitution without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS75N directly replace the DM74LS75N on existing PCBs?

A: Yes. Both parts use identical 16-DIP (0.300", 7.62mm) through-hole packages with matching pin configurations and electrical specifications. Direct board-level substitution is possible without modification.

Q: Are there differences in propagation delay between these parts?

A: The DM74LS75N specifies 20ns propagation delay, while the SN74LS75N specifies 9ns. The SN74LS75N exhibits faster propagation characteristics. Applications with timing-critical requirements should verify that the faster response time does not introduce signal integrity issues.

Q: What is the significance of the circuit configuration difference (4:4 vs 1:1)?

A: The circuit configuration notation reflects internal channel organization. Both parts function as quad latches with identical external behavior and pin compatibility. This difference does not affect substitution eligibility.

Q: Why is RoHS compliance important for this substitution?

A: RoHS compliance indicates adherence to restrictions on hazardous substances in electrical and electronic equipment. The SN74LS75N's ROHS3 compliance makes it suitable for applications and markets requiring environmental regulatory compliance, whereas the DM74LS75N's non-compliance may restrict its use in certain jurisdictions or OEM requirements.

Q: Are there output type differences between these parts?

A: The DM74LS75N specifies tri-state output, while the SN74LS75N specifies differential output. Both configurations provide the necessary latching functionality for 74LS logic applications. Verify that your circuit design accommodates the output type of the selected substitute.