DM74ALS02M Equivalent & Substitute Parts

Part Overview

The DM74ALS02M is a NOR Gate IC featuring 4 channels with 2 inputs per channel in a 14-SOIC surface mount package, manufactured by onsemi. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and procurement planning. The part operates within a 4.5V to 5.5V supply voltage range and is suitable for logic-level applications requiring NOR gate functionality.

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
Package / Case	14-SOIC (0.154", 3.90mm Width)
Series	74ALS
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the DM74ALS02M is determined by strict equivalence across the following critical parameters:

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
Series: 74ALS
Moisture Sensitivity Level (MSL): 1 (Unlimited)

The substitute parts are grouped as follows:

Direct Manufacturer Equivalent: SN74ALS02ADR (Texas Instruments) — identical electrical and mechanical specifications with Tape & Reel packaging and Active product status.

Similar Manufacturer Equivalent: SN74ALS02ANSR (Texas Instruments) — functionally equivalent with identical electrical parameters but different package dimensions (14-SO with 0.209" width versus 0.154" width) and Tape & Reel packaging.

Parametric Equivalent: SN74ALS02AD (Texas Instruments) — identical electrical and mechanical specifications with Tube packaging and Last Time Buy product status.

Parameter Comparison

Parameter	DM74ALS02M (onsemi)	SN74ALS02ADR (TI)	SN74ALS02ANSR (TI)	SN74ALS02AD (TI)
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 (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.209", 5.30mm Width)	14-SOIC (0.154", 3.90mm Width)
Series	74ALS	74ALS	74ALS	74ALS
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Last Time Buy
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Type	Not specified	Tape & Reel (TR)	Tape & Reel (TR)	Tube

Engineering Selection Recommendations

For new designs and active procurement: SN74ALS02ADR is the preferred substitute. This part is manufactured by Texas Instruments with Active product status, ROHS3 compliance, and identical electrical and mechanical specifications to the DM74ALS02M. Tape & Reel packaging is suitable for automated assembly processes.

For legacy system support with packaging flexibility: SN74ALS02ANSR provides functional equivalence with identical electrical performance. The package width difference (0.209" versus 0.154") must be evaluated against PCB layout constraints. This part maintains Active product status and ROHS3 compliance.

For applications with extended procurement timelines: SN74ALS02AD offers parametric equivalence with identical specifications but carries Last Time Buy status. Tube packaging is appropriate for lower-volume or manual assembly applications. This option should be considered only when supply chain continuity is critical and volume requirements are limited.

All three substitute parts maintain compliance with REACH and EAR99 export classifications consistent with the original DM74ALS02M.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS02ANSR be used as a direct replacement for DM74ALS02M on existing PCBs?

A: SN74ALS02ANSR is functionally equivalent but has different package dimensions. The 14-SO package width is 0.209" compared to the 0.154" width of the original 14-SOIC package. PCB layout compatibility must be verified before substitution.

Q: What is the difference between the three Texas Instruments substitutes?

A: SN74ALS02ADR and SN74ALS02AD are electrically and mechanically identical, differing only in packaging format (Tape & Reel versus Tube) and product status (Active versus Last Time Buy). SN74ALS02ANSR has identical electrical specifications but different package dimensions. Selection depends on assembly method, volume requirements, and supply availability.

Q: Are all substitute parts RoHS compliant?

A: Yes. SN74ALS02ADR, SN74ALS02ANSR, and SN74ALS02AD are all ROHS3 compliant. The original DM74ALS02M RoHS status was not specified in the provided data.

Q: Can these parts be used interchangeably in terms of electrical performance?

A: Yes. All substitute parts meet identical electrical specifications: 4.5V to 5.5V supply voltage, 400µA/8mA output current, 12ns propagation delay at 5V with 50pF load, and 0°C to 70°C operating temperature range.

Q: Which substitute should be selected for high-volume production?

A: SN74ALS02ADR is recommended for high-volume production due to its Active product status, Tape & Reel packaging optimized for automated assembly, and ROHS3 compliance.

Q: What is the significance of "Last Time Buy" status for SN74ALS02AD?

A: Last Time Buy indicates that Texas Instruments will discontinue this part after a specified date. While currently available, procurement should prioritize SN74ALS02ADR for long-term supply chain stability.

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