DM74ALS02MX Equivalent & Substitute Parts

Part Overview

The DM74ALS02MX 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 equivalent and substitute parts necessary for ongoing design support and procurement continuity. 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

Substitute parts for the DM74ALS02MX are qualified based on the following criteria:

Critical Parameters for Substitution:

Logic Type: NOR Gate
Number of Circuits: 4
Number of Inputs: 2
Voltage - Supply: 4.5V ~ 5.5V
Input Logic Levels: Low 0.8V, High 2V
Max Propagation Delay: 12ns @ 5V, 50pF
Operating Temperature: 0°C ~ 70°C
Series: 74ALS

Substitution Categories:

Direct Manufacturer Equivalent: SN74ALS02AD (Texas Instruments) — Identical electrical parameters and 14-SOIC package footprint. Supplied in Tube packaging.

Similar Manufacturer Part: SN74ALS02ANSR (Texas Instruments) — Identical electrical parameters with package variation (14-SO, 0.209" width vs. 0.154" width). Supplied in Tape & Reel packaging. Active product status.

Parametric Equivalent: SN74ALS02ADR (Texas Instruments) — Identical electrical parameters and 14-SOIC package footprint. Supplied in Tape & Reel packaging. Active product status.

Parameter Comparison

Parameter	DM74ALS02MX (onsemi)	SN74ALS02AD (TI)	SN74ALS02ANSR (TI)	SN74ALS02ADR (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
Product Status	Obsolete	Last Time Buy	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Type	Not specified	Tube	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct PCB Replacement (No Layout Changes): Select SN74ALS02AD or SN74ALS02ADR. Both maintain identical 14-SOIC (0.154", 3.90mm Width) package dimensions and electrical parameters. SN74ALS02ADR is preferred due to active product status and Tape & Reel packaging for automated assembly.

For New Designs or Flexible Layout: SN74ALS02ANSR is suitable if PCB layout can accommodate the wider 14-SOIC (0.209", 5.30mm Width) package. This part offers active product status and Tape & Reel packaging.

Compliance Considerations: All Texas Instruments substitutes are ROHS3 compliant and REACH unaffected, providing regulatory alignment for modern manufacturing environments. The onsemi DM74ALS02MX obsolete status necessitates transition to an active alternative for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS02ANSR be used as a direct replacement for DM74ALS02MX? A: SN74ALS02ANSR is electrically equivalent but has a different package width (0.209" vs. 0.154"). PCB layout modifications are required if the original design uses the narrower 0.154" footprint spacing.

Q: What is the difference between SN74ALS02AD and SN74ALS02ADR? A: Both parts are electrically and mechanically identical with the same 14-SOIC (0.154", 3.90mm Width) package. The primary difference is packaging format: SN74ALS02AD is supplied in Tube, while SN74ALS02ADR is supplied in Tape & Reel. SN74ALS02ADR is recommended for automated assembly processes.

Q: Why is the DM74ALS02MX listed as obsolete? A: The DM74ALS02MX is classified as obsolete by onsemi. Texas Instruments maintains active production of equivalent 74ALS02 NOR gate variants, making their parts the recommended long-term solution.

Q: Are all substitute parts pin-compatible with the original DM74ALS02MX? A: Yes. All substitute parts maintain the 74ALS series pinout and 14-SOIC package configuration, ensuring direct pin-for-pin compatibility.

Q: What are the key electrical parameters that define substitution eligibility? A: Supply voltage (4.5V ~ 5.5V), logic levels (Low 0.8V, High 2V), propagation delay (12ns @ 5V, 50pF), output current (400µA, 8mA), and operating temperature range (0°C ~ 70°C) must remain constant across all substitutes.

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