SN74LS02DE4 Equivalent & Substitute Parts

Part Overview

The SN74LS02DE4 is a NOR Gate IC with 4 channels and 2 inputs per channel, manufactured by Texas Instruments in a 14-SOIC surface mount package. This logic component operates within the 74LS series standard and is currently classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts ensures design continuity and supply chain reliability for applications requiring NOR gate functionality with these electrical specifications.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	4.75V ~ 5.25V
Current - Output High, Low	400µA, 16mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	15ns @ 5V, 15pF
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the SN74LS02DE4 is determined by strict equivalence across the following critical parameters:

Logic Type: NOR Gate (4 channel, 2 input)
Electrical Specifications: Voltage supply range, output current ratings, input logic levels, and propagation delay
Package Type: 14-SOIC surface mount package
Series Classification: 74LS logic family

The substitute parts identified—SN74LS02D and SN74LS02DR—match all electrical and functional parameters. Differences exist only in manufacturer, packaging format (Tube vs. Tape & Reel), and product status classifications.

Parameter Comparison

Parameter	SN74LS02DE4 (TI)	SN74LS02D (onsemi)	SN74LS02DR (TI)
Manufacturer	Texas Instruments	onsemi	Texas Instruments
Logic Type	NOR Gate	NOR Gate	NOR Gate
Number of Circuits	4	4	4
Number of Inputs	2	2	2
Voltage - Supply	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V
Current - Output High, Low	400µA, 16mA	400µA, 16mA	400µA, 16mA
Input Logic Level - Low	0.8V	0.8V	0.8V
Input Logic Level - High	2V	2V	2V
Max Propagation Delay @ V, Max CL	15ns @ 5V, 15pF	15ns @ 5V, 15pF	15ns @ 5V, 15pF
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Package / Case	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Tube	Tube	Tape & Reel (TR)
Product Status	Last Time Buy	Obsolete	Active
RoHS Status	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

SN74LS02DR (Texas Instruments, Tape & Reel) is the primary substitute for new designs and ongoing production. This part maintains Active product status, ROHS3 compliance, and is available in high volume (35,190 pcs). It is manufactured by the original supplier and carries identical electrical specifications and package geometry.

SN74LS02D (onsemi, Tube) provides functional equivalence but carries Obsolete product status and RoHS non-compliance. This part is suitable only for legacy system maintenance or applications where RoHS compliance is not required. The Tube packaging format differs from the original Tape & Reel format of SN74LS02DR.

For supply chain continuity, SN74LS02DR is the recommended selection due to Active status and full compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can SN74LS02D be used as a direct replacement for SN74LS02DE4?

A: SN74LS02D provides electrical and functional equivalence. However, it is classified as Obsolete and is RoHS non-compliant. Use is limited to applications where these factors are acceptable.

Q: What is the difference between SN74LS02DE4 and SN74LS02DR?

A: Both parts are manufactured by Texas Instruments with identical electrical specifications and 14-SOIC package geometry. The primary differences are packaging format (Tube vs. Tape & Reel) and product status (Last Time Buy vs. Active). SN74LS02DR is recommended for new designs.

Q: Are all substitute parts pin-compatible?

A: Yes. All listed substitutes use the 14-SOIC package with identical pin configuration and electrical characteristics, ensuring direct PCB compatibility.

Q: Does packaging format affect electrical performance?

A: No. Tube and Tape & Reel packaging formats do not affect component electrical performance or functionality. The difference is in handling and automated assembly compatibility.

Q: Why is SN74LS02D marked as Obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued production. While functional equivalence is maintained, future availability cannot be guaranteed.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message