SN74HCS7002DR Equivalent & Substitute Parts

Part Overview

The SN74HCS7002DR is a 4-channel NOR gate logic integrated circuit manufactured by Texas Instruments. This device features Schmitt trigger inputs and operates across a 2V to 6V supply voltage range, making it suitable for low-power digital logic applications. The part is classified as Active product status with AEC-Q100 automotive qualification and ROHS3 compliance. Substitute parts are identified when equivalent electrical performance, package compatibility, and functional specifications align with the original component, enabling seamless integration in circuit designs where the primary part becomes unavailable or inventory constraints require alternative sourcing.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Features	Schmitt Trigger Input
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	7.8mA, 7.8mA
Input Logic Level - Low	1V ~ 3V
Input Logic Level - High	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	12ns
Operating Temperature	-40°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74HCS7002DR are identified based on strict parametric equivalence across the following critical specifications:

Logic Function & Architecture: Both the main part and substitute must implement a 4-channel NOR gate with 2 inputs per channel and Schmitt trigger input characteristics.

Electrical Performance: Supply voltage range (2V ~ 6V), quiescent current (2 µA maximum), output drive current (7.8mA for both high and low states), input logic thresholds (Low: 1V ~ 3V, High: 1.5V ~ 4.2V), and propagation delay (12ns @ 6V, 50pF) must be identical.

Package & Mounting: The 14-SOIC surface mount package with 0.154" width (3.90mm) is mandatory for mechanical compatibility.

Environmental & Compliance: Operating temperature range (-40°C ~ 125°C), RoHS3 compliance, and MSL rating (1 - Unlimited) must match.

Product Status: Only Active status parts qualify as substitutes to ensure ongoing availability and manufacturer support.

Parameter Comparison

Parameter	SN74HCS7002DR	SN74HCS02DR
Manufacturer	Texas Instruments	Texas Instruments
Logic Type	NOR Gate	NOR Gate
Number of Circuits	4	4
Number of Inputs	2	2
Features	Schmitt Trigger Input	Schmitt Trigger Input
Voltage - Supply	2V ~ 6V	2V ~ 6V
Current - Quiescent (Max)	2 µA	2 µA
Current - Output High, Low	7.8mA, 7.8mA	7.8mA, 7.8mA
Input Logic Level - Low	1V ~ 3V	1V ~ 3V
Input Logic Level - High	1.5V ~ 4.2V	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	12ns	12ns
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active

Engineering Selection Recommendations

The SN74HCS02DR qualifies as a parametric equivalent substitute for the SN74HCS7002DR based on complete alignment of electrical specifications, package geometry, and environmental ratings. Both parts are manufactured by Texas Instruments, maintain Active product status, and carry identical certifications including ROHS3 compliance and AEC-Q100 automotive qualification. The SN74HCS02DR demonstrates higher inventory availability (5010 units versus 895 units), providing supply chain flexibility without compromising functional or mechanical compatibility. Selection between these parts depends solely on inventory requirements and lead time considerations, as all technical parameters remain equivalent.

Frequently Asked Questions (FAQ)

Q: Can the SN74HCS02DR be used as a direct replacement for the SN74HCS7002DR in existing circuit designs?

A: Yes. The SN74HCS02DR is a parametric equivalent with identical electrical performance, logic function, input/output characteristics, and 14-SOIC package dimensions. No circuit modifications are required.

Q: Are there differences in the Schmitt trigger input specifications between these parts?

A: No. Both parts feature Schmitt trigger inputs with identical input logic level thresholds (Low: 1V ~ 3V, High: 1.5V ~ 4.2V) and propagation delay characteristics (12ns @ 6V, 50pF).

Q: Do both parts support the same supply voltage range?

A: Yes. Both the SN74HCS7002DR and SN74HCS02DR operate across 2V to 6V supply voltage with identical quiescent current (2 µA maximum) and output drive capabilities (7.8mA).

Q: Are the package dimensions identical?

A: Yes. Both parts use the 14-SOIC surface mount package with 0.154" width (3.90mm), ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -40°C to 125°C, supporting automotive and industrial applications with identical thermal performance.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, carry MSL rating 1 (Unlimited), and hold AEC-Q100 automotive qualification.

Q: Why would I select one part over the other if they are equivalent?

A: Selection is based on inventory availability and procurement lead times. The SN74HCS02DR currently has higher stock levels (5010 units), while the SN74HCS7002DR has 895 units available. Both are functionally and mechanically interchangeable.

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