DM74ALS02SJX Equivalent & Substitute Parts

Part Overview

The DM74ALS02SJX is a NOR Gate IC with 4 channels and 2 inputs per channel in a 14-SOP package, manufactured by onsemi. This logic component operates within the 74ALS series and is designed for digital logic applications requiring NOR gate functionality. The part is currently listed as obsolete, making identification of equivalent and substitute parts essential for design continuity and procurement planning.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	4.5V ~ 5.5V
Current - Output High, Low	400µA, 8mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	12ns @ 5V, 50pF
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Series	74ALS
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DM74ALS02SJX is determined by strict equivalence across the following parameters:

Logic Function: All substitutes must be NOR gates with identical circuit count (4) and input configuration (2 inputs per channel)
Electrical Specifications: Supply voltage range (4.5V ~ 5.5V), output current ratings (400µA, 8mA), input logic levels (0.8V low, 2V high), and propagation delay (12ns @ 5V, 50pF) must match exactly
Operating Temperature: 0°C ~ 70°C range must be maintained
Series Compatibility: All substitutes belong to the 74ALS logic family
Package Compatibility: Physical package dimensions and pin configurations must support direct replacement or board-level compatibility

The substitute parts are grouped as follows:

Direct Substitutes (Pin-Compatible): SN74ALS02AD and SN74ALS02ADR maintain identical electrical parameters and 14-SOIC packaging with compatible physical dimensions.

Parametric Equivalent: SN74ALS02ANSR provides identical electrical performance and operates within the same 14-SO package family, with equivalent pin configuration and functionality.

Parameter Comparison

Parameter	DM74ALS02SJX	SN74ALS02AD	SN74ALS02ADR	SN74ALS02ANSR
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	NOR Gate	NOR Gate	NOR Gate	NOR Gate
Number of Circuits	4	4	4	4
Number of Inputs	2	2	2	2
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Current - Output High, Low	400µA, 8mA	400µA, 8mA	400µA, 8mA	400µA, 8mA
Input Logic Level - Low	0.8V	0.8V	0.8V	0.8V
Input Logic Level - High	2V	2V	2V	2V
Max Propagation Delay @ V, Max CL	12ns @ 5V, 50pF	12ns @ 5V, 50pF	12ns @ 5V, 50pF	12ns @ 5V, 50pF
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.209", 5.30mm Width)
Product Status	Obsolete	Last Time Buy	Active	Active
RoHS Status	REACH Unaffected	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SN74ALS02ADR is the primary recommended substitute. This part is manufactured by Texas Instruments, maintains active product status, and carries ROHS3 compliance certification. It provides identical electrical performance and is available in Tape & Reel packaging with the highest inventory availability (4200 pcs). The 14-SOIC package with 0.154" width represents a modern standard form factor.

SN74ALS02ANSR serves as an alternative equivalent with active product status and ROHS3 compliance. This part maintains the original 14-SOIC package width (0.209", 5.30mm), matching the physical footprint of the DM74ALS02SJX more closely. It is available in Tape & Reel packaging with substantial inventory (3600 pcs).

SN74ALS02AD is available as a secondary option with Last Time Buy status, indicating limited future availability. While electrically equivalent and ROHS3 compliant, procurement should prioritize the active-status alternatives for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS02ADR directly replace DM74ALS02SJX on existing PCBs?

A: SN74ALS02ADR is electrically equivalent and pin-compatible. However, the package width differs (0.154" vs. 0.209"), which may affect PCB footprint compatibility. Verify footprint dimensions before board-level substitution.

Q: What is the difference between SN74ALS02AD and SN74ALS02ADR?

A: Both parts are electrically identical with matching electrical specifications. The primary difference is packaging format: SN74ALS02AD is supplied in Tube packaging, while SN74ALS02ADR is supplied in Tape & Reel format. Selection depends on assembly process requirements.

Q: Why is SN74ALS02ANSR listed as a parametric equivalent rather than a direct substitute?

A: SN74ALS02ANSR maintains identical electrical parameters and pin configuration. It is classified as a parametric equivalent because it preserves the original package width (0.209", 5.30mm), making it the closest physical match to the DM74ALS02SJX for existing board designs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. SN74ALS02AD, SN74ALS02ADR, and SN74ALS02ANSR are all ROHS3 compliant. The original DM74ALS02SJX is listed as REACH Unaffected, indicating it predates current compliance requirements.

Q: What is the inventory status for each substitute?

A: SN74ALS02ADR has the highest availability at 4200 pcs. SN74ALS02ANSR is available with 3600 pcs. SN74ALS02AD has 1718 pcs available but carries Last Time Buy status, indicating declining availability.

Q: Can these parts be used interchangeably in new designs?

A: All three substitutes are functionally and electrically equivalent within the specified parameters. Selection should be based on packaging requirements, compliance certifications, and long-term availability. SN74ALS02ADR is recommended for new designs due to active product status.

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