DM74LS38N NAND Gate IC Equivalent & Substitute Parts

Part Overview

The DM74LS38N is a 4-channel, 2-input NAND gate IC with open collector output in a 14-MDIP package, manufactured by onsemi. This logic gate is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The part operates within the standard 74LS logic family voltage range of 4.75V to 5.25V and is suitable for through-hole mounting applications.

Substiute Parts

DM74LS38N

onsemiIn Stock: 1981DM74LS38N Datasheet

Current PartRFQ

SN74LS38N

Texas InstrumentsIn Stock: 2413SN74LS38N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74LS38N is determined by the following critical parameters:

• Logic Function: NAND gate with 4 channels and 2 inputs per channel
• Output Configuration: Open collector topology
• Supply Voltage Range: 4.75V ~ 5.25V
• Input Logic Levels: Low threshold 0.8V, High threshold 2V
• Package Compatibility: 14-DIP form factor with 0.300" (7.62mm) pitch
• Mounting: Through-hole technology
• Series Family: 74LS logic family

The SN74LS38N from Texas Instruments meets all these substitution criteria. Both parts share identical logic function, output configuration, voltage specifications, input logic levels, operating temperature range, and physical package dimensions. This ensures functional and mechanical compatibility for direct replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS38N from Texas Instruments is a direct functional substitute for the DM74LS38N. Both parts are members of the 74LS logic family and share identical logic specifications, voltage requirements, input thresholds, and physical packaging.

The SN74LS38N offers the following advantages for new designs and production:

• Active Product Status: The SN74LS38N maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete DM74LS38N.
• RoHS3 Compliance: The SN74LS38N meets ROHS3 compliance requirements, supporting environmental and regulatory standards for modern manufacturing.
• Enhanced Performance Characteristics: The SN74LS38N provides faster propagation delay (32ns versus 48ns) and higher output current capability (24mA versus 8mA), delivering improved performance margins in applications requiring higher drive capability or faster switching speeds.

Both parts maintain identical supply voltage ranges, input logic levels, operating temperature specifications, and 14-DIP package dimensions, confirming direct pin-for-pin compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS38N directly replace the DM74LS38N in existing designs?

A: Yes. Both parts are 4-channel, 2-input NAND gates with open collector output in 14-DIP packages. They share identical supply voltage ranges (4.75V ~ 5.25V), input logic levels (0.8V low, 2V high), operating temperature range (0°C ~ 70°C), and pin configurations. Direct pin-for-pin substitution is supported.

Q: What are the key differences between these parts?

A: The primary differences are product status, compliance certification, and performance characteristics. The SN74LS38N is active production with ROHS3 compliance, while the DM74LS38N is obsolete and RoHS non-compliant. The SN74LS38N also provides faster propagation delay (32ns versus 48ns) and higher output current (24mA versus 8mA).

Q: Are there any package or mounting differences?

A: No. Both parts use identical 14-DIP (0.300", 7.62mm) through-hole packages. Physical dimensions and pin spacing are identical, ensuring compatibility with existing PCB layouts and socket configurations.

Q: Which part should be selected for new designs?

A: The SN74LS38N is the appropriate choice for new designs due to its active production status, RoHS3 compliance, and enhanced performance characteristics. The DM74LS38N should only be considered for legacy system maintenance where exact part matching is required.

Q: Do these parts have identical electrical specifications?

A: The parts share identical logic function, voltage specifications, input thresholds, and operating temperature ranges. The SN74LS38N provides superior output current capability (24mA versus 8mA) and faster propagation delay (32ns versus 48ns), making it suitable for applications with higher performance requirements.