DM74LS14N Equivalent & Substitute Parts

Part Overview

The DM74LS14N is a 6-channel inverter IC with Schmitt trigger inputs manufactured by onsemi in a 14-MDIP package. This logic component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The DM74LS14N performs digital inversion with hysteresis characteristics suitable for signal conditioning applications requiring noise immunity.

Substiute Parts

DM74LS14N

onsemiIn Stock: 10446DM74LS14N Datasheet

Current PartRFQ

SN74LS14N

Texas InstrumentsIn Stock: 16169SN74LS14N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74LS14N is determined by strict equivalence across the following critical parameters:

• Logic Type: Inverter with Schmitt trigger functionality
• Circuit Configuration: 6 channels with single input per channel
• Electrical Specifications: Supply voltage 4.75V ~ 5.25V, output current ratings 400µA high / 8mA low, input logic thresholds at 0.5V low and 1.9V high
• Package Form Factor: 14-DIP through-hole mounting with 0.300" (7.62mm) pitch
• Base Series: 74LS logic family

The SN74LS14N from Texas Instruments meets all substitution criteria within these parameters. Both parts share identical functional specifications, electrical characteristics, and physical packaging, enabling direct functional replacement.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS14N is the direct functional equivalent for DM74LS14N replacement. Selection between these parts should be based on the following criteria:

For new designs and production requiring regulatory compliance, the SN74LS14N is preferred due to its active product status and ROHS3 compliance certification. The onsemi DM74LS14N, classified as obsolete, presents supply chain risk and does not meet current environmental compliance standards.

Both parts are electrically and mechanically interchangeable within the specified operating parameters. The 14-DIP through-hole package enables direct socket substitution without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can SN74LS14N directly replace DM74LS14N in existing designs?

A: Yes. Both parts are functionally equivalent across all critical parameters: logic type, circuit count, electrical specifications, input/output characteristics, and 14-DIP package form factor. Direct socket substitution is possible without circuit modification.

Q: What is the difference in propagation delay between these parts?

A: The DM74LS14N specifies 33ns maximum propagation delay at 5V with 50pF load, while the SN74LS14N specifies 22ns at 5V with 15pF load. Both operate within the 74LS logic family timing envelope. The SN74LS14N demonstrates faster performance under the specified test conditions.

Q: Are there compliance differences between the two parts?

A: Yes. The SN74LS14N is ROHS3 compliant and carries active product status from Texas Instruments. The DM74LS14N is RoHS non-compliant and classified as obsolete. For applications requiring environmental compliance certification, SN74LS14N is the appropriate selection.

Q: Is the 14-DIP package identical between both parts?

A: Yes. Both parts use 14-DIP (0.300", 7.62mm) through-hole packaging with identical pin configuration and mechanical dimensions, enabling direct PCB compatibility.

Q: What supply voltage range applies to both parts?

A: Both the DM74LS14N and SN74LS14N operate within 4.75V to 5.25V supply voltage range with identical input logic thresholds (0.5V low, 1.9V high) and output current specifications (400µA high, 8mA low).