DM74LS377N Equivalent & Substitute Parts

Part Overview

The DM74LS377N is a Logic category integrated circuit functioning as a Flip Flop 1 Element D-Type 8 Bit with Positive Edge triggering in a 20-DIP (0.300", 7.62mm) through-hole package. This component is classified as Obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The 74LS series architecture and pinout compatibility form the basis for evaluating alternative components.

Substiute Parts

DM74LS377N

onsemiIn Stock: 1226DM74LS377N Datasheet

Current PartRFQ

SN74LS377N

Texas InstrumentsIn Stock: 2186SN74LS377N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DM74LS377N is determined by the following critical parameters:

• Series Compatibility: Both parts must belong to the 74LS logic family to ensure functional equivalence
• Package Compatibility: Identical 20-DIP (0.300", 7.62mm) through-hole package required for direct board-level replacement
• Functional Architecture: D-Type Flip Flop configuration with 1 Element and 8 Bits per Element
• Electrical Specifications: Matching voltage supply range (4.75V ~ 5.25V) and operating temperature range (0°C ~ 70°C)
• Trigger Mechanism: Positive Edge triggering requirement
• Output Characteristics: Current output specifications (400µA High, 8mA Low) must be compatible

The SN74LS377N from Texas Instruments meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS377N from Texas Instruments is the direct substitute for the DM74LS377N. Selection rationale is based on the following factors:

• Product Status: The SN74LS377N maintains Active status, ensuring continued availability and supply chain reliability compared to the Obsolete DM74LS377N
• Compliance Posture: The SN74LS377N is ROHS3 Compliant, whereas the DM74LS377N is RoHS non-compliant, providing regulatory advantage for new designs and systems subject to environmental compliance requirements
• Functional Equivalence: Both components share identical 74LS series architecture, D-Type flip-flop configuration, 8-bit structure, and electrical operating parameters
• Package Compatibility: Direct 20-DIP through-hole package match enables pin-for-pin replacement without PCB redesign
• Inventory Availability: The SN74LS377N has documented stock of 2130 Pcs New Original, supporting immediate procurement needs

Frequently Asked Questions (FAQ)

Q: Can the SN74LS377N replace the DM74LS377N in existing designs?

A: Yes. The SN74LS377N is a direct substitute. Both components share identical package geometry (20-DIP), pinout, voltage supply range (4.75V ~ 5.25V), operating temperature range (0°C ~ 70°C), and output current specifications (400µA, 8mA). Pin-for-pin replacement is supported without circuit modification.

Q: What is the primary advantage of switching to the SN74LS377N?

A: The SN74LS377N is classified as Active product status with ROHS3 compliance, whereas the DM74LS377N is Obsolete and RoHS non-compliant. This ensures long-term supply availability and regulatory compliance for systems subject to environmental standards.

Q: Are there differences in clock frequency between these parts?

A: The DM74LS377N specifies 30 MHz clock frequency, while the SN74LS377N specifies 40 MHz. Both exceed typical 74LS series operating requirements. The higher specification of the SN74LS377N provides additional performance margin without affecting compatibility.

Q: Is the 20-DIP package still widely supported?

A: Yes. The 20-DIP through-hole package remains standard for 74LS series logic components. Both the DM74LS377N and SN74LS377N utilize this package format, ensuring compatibility with existing PCB designs and assembly processes.

Q: What packaging options are available for the SN74LS377N?

A: The SN74LS377N is supplied in Tube packaging format. Verify packaging requirements against your procurement and assembly specifications before ordering.