DM74LS05N Equivalent & Substitute Parts

Part Overview

The DM74LS05N is a 6-channel inverter logic IC with open collector outputs, manufactured by onsemi in a 14-MDIP package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The open collector configuration allows for flexible output voltage levels and current sinking applications in digital logic circuits.

Substiute Parts

DM74LS05N

onsemiIn Stock: 39816DM74LS05N Datasheet

Current PartRFQ

SN74LS05N

onsemiIn Stock: 5366SN74LS05N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DM74LS05N is determined by the following critical parameters:

• Logic Type: Inverter (6-channel configuration)
• Features: Open Collector output architecture
• Voltage Supply Range: 4.75V ~ 5.25V
• Input Logic Levels: Low 0.8V, High 2V
• Output Current Capability: 8mA sink
• Operating Temperature Range: 0°C ~ 70°C
• Package Type: 14-DIP through-hole form factor
• Series Classification: 74LS logic family

The SN74LS05N qualifies as a direct substitute, maintaining identical logic function, electrical specifications, and package compatibility while originating from the same manufacturer and product series.

Parameter Comparison

Engineering Selection Recommendations

Both the DM74LS05N and SN74LS05N are classified as obsolete products with identical electrical and mechanical specifications. Selection between these parts should be based on inventory availability and procurement lead times. The SN74LS05N currently maintains higher inventory levels (5300 pcs) compared to the DM74LS05N (39790 pcs), though both are available through authorized distributors.

Neither part meets current RoHS compliance requirements. Applications requiring RoHS-compliant alternatives must evaluate modern inverter logic ICs from current product lines, which may require circuit redesign considerations due to different package options and electrical characteristics.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS05N directly replace the DM74LS05N in existing designs?

A: Yes. Both parts are 74LS series inverters with identical logic function, electrical specifications, and 14-DIP package dimensions. No circuit modifications are required for direct substitution.

Q: What is the difference between the DM74LS05N and SN74LS05N?

A: The primary difference is the manufacturer part number prefix (DM vs. SN). Both are produced by onsemi and share identical specifications for logic type, channel count, open collector output, supply voltage, input logic levels, output current, operating temperature, and package form factor.

Q: Are there RoHS-compliant alternatives available?

A: Both the DM74LS05N and SN74LS05N are RoHS non-compliant. Modern RoHS-compliant inverter logic ICs exist in the 74LS family and other logic families, but these may differ in package type, electrical performance, or availability. Compatibility assessment requires detailed comparison against specific design requirements.

Q: What does "open collector" mean for this inverter IC?

A: Open collector outputs allow the output to sink current to ground but do not source current. External pull-up resistors are required to establish high logic levels. This configuration enables flexible output voltage levels and current-sinking applications in digital logic circuits.

Q: Can this part be used in new designs?

A: Both parts are obsolete. While inventory remains available, new designs should evaluate current-generation logic ICs to ensure long-term supply chain stability and compliance with modern standards.