DM74ALS03BN Equivalent & Substitute Parts

Part Overview

The DM74ALS03BN is a NAND Gate IC featuring 4 channels with 2 inputs per channel and open collector output configuration, housed in a 14-MDIP package. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system support and procurement planning. The open collector architecture provides flexibility for logic level interfacing and multi-source wired logic applications.

Substiute Parts

DM74ALS03BN

onsemiIn Stock: 2404DM74ALS03BN Datasheet

Current PartRFQ

SN74ALS03BN

Texas InstrumentsIn Stock: 5157SN74ALS03BN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74ALS03BN is determined by strict equivalence across the following critical parameters:

• Logic Function: NAND gate with 4 channels, 2 inputs per channel
• Output Configuration: Open collector topology
• Electrical Specifications: Supply voltage 4.5V–5.5V, output current 8mA, input logic thresholds, and propagation delay
• Package Compatibility: 14-DIP through-hole form factor with 0.300" (7.62mm) pitch
• Base Product Series: 74ALS logic family

The SN74ALS03BN from Texas Instruments meets all these criteria as a parametric equivalent, with identical functional and electrical characteristics. The primary distinction is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS03BN from Texas Instruments is the direct parametric equivalent for the obsolete DM74ALS03BN. Selection between these parts should be based on the following factors:

Product Status: The DM74ALS03BN is obsolete, whereas the SN74ALS03BN maintains active status with ongoing manufacturer support and availability. For new designs or long-term system support, the SN74ALS03BN is the appropriate choice.

Compliance and Certifications: The SN74ALS03BN carries RoHS3 compliance certification, whereas the DM74ALS03BN does not specify RoHS status. Both parts are REACH Unaffected and classified under ECCN EAR99. For applications requiring RoHS compliance, the SN74ALS03BN is mandatory.

Packaging and Availability: Both parts are supplied in through-hole 14-DIP packages with identical pinout and mechanical dimensions. The SN74ALS03BN is available in tube packaging with higher inventory levels, supporting consistent procurement.

Electrical Equivalence: All functional and electrical parameters are identical, ensuring direct functional substitution without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS03BN directly replace the DM74ALS03BN without circuit modification?

A: Yes. The SN74ALS03BN is a parametric equivalent with identical logic function, electrical specifications, and 14-DIP package pinout. Direct substitution is possible without circuit redesign.

Q: Are there any differences in package dimensions between these parts?

A: No. Both parts use the 14-DIP (0.300", 7.62mm) package with identical mechanical specifications and through-hole mounting compatibility.

Q: What is the significance of the DM74ALS03BN being obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued production. The SN74ALS03BN from Texas Instruments remains in active production, ensuring long-term availability and support for replacement and repair applications.

Q: Does the SN74ALS03BN meet RoHS requirements?

A: Yes. The SN74ALS03BN is RoHS3 compliant, making it suitable for applications with RoHS regulatory requirements. The DM74ALS03BN does not specify RoHS compliance.

Q: Are the electrical characteristics identical between these parts?

A: Yes. Supply voltage range (4.5V–5.5V), output current (8mA), input logic thresholds (0.8V low, 2V high), and propagation delay (50ns @ 5V, 50pF) are identical across both parts.

Q: What is the significance of open collector output configuration?

A: Open collector output allows multiple gates to be wired together for wired-AND logic functions and provides flexibility for interfacing with different logic voltage levels through external pull-up resistors.