74F02SJX NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74F02SJX is a 4-channel 2-input NOR gate logic IC manufactured by onsemi in 14-SOP surface mount packaging. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74F series NOR gate performs fundamental logic operations in digital circuits and maintains consistent electrical characteristics across qualified substitute options.

Key Parameters

Parameter	Specification
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	4.5V ~ 5.5V
Output Current High/Low	1mA / 20mA
Input Logic Level Low	0.8V
Input Logic Level High	2V
Max Propagation Delay	5.5ns @ 5V, 50pF
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package Type	14-SOIC
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74F02SJX are qualified based on matching the following critical parameters:

Logic configuration: 4-channel NOR gate with 2 inputs per channel
Electrical specifications: 4.5V ~ 5.5V supply voltage, 1mA/20mA output current, identical input logic thresholds and propagation delay
Operating temperature range: 0°C ~ 70°C
Surface mount packaging: 14-SOIC form factor
Moisture sensitivity: MSL 1 (Unlimited)

All substitute parts listed maintain identical functional and electrical characteristics to the main part number. Package width variations (0.209" vs 0.154") represent standard industry tolerances within the 14-SOIC specification and do not affect electrical compatibility.

Parameter Comparison

Parameter	74F02SJX (onsemi)	SN74F02D (TI)	SN74F02DR (TI)	SN74F02NSR (TI)
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	NOR Gate	NOR Gate	NOR Gate	NOR Gate
Circuits / Inputs	4 / 2	4 / 2	4 / 2	4 / 2
Voltage Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Output Current (High/Low)	1mA / 20mA	1mA / 20mA	1mA / 20mA	1mA / 20mA
Input Logic Level Low	0.8V	0.8V	0.8V	0.8V
Input Logic Level High	2V	2V	2V	2V
Max Propagation Delay	5.5ns @ 5V, 50pF	5.5ns @ 5V, 50pF	5.5ns @ 5V, 50pF	5.5ns @ 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)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.209", 5.30mm)
Product Status	Obsolete	Last Time Buy	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

SN74F02DR (Texas Instruments) is the primary recommended substitute. This part maintains active product status with full ROHS3 compliance and is available in tape and reel packaging for production environments. Electrical and functional specifications are identical to the 74F02SJX.

SN74F02NSR (Texas Instruments) provides an alternative with active product status and ROHS3 compliance. This part matches the original 14-SOIC package width (0.209", 5.30mm) and offers identical electrical performance.

SN74F02D (Texas Instruments) is available as a last-time-buy option with ROHS3 compliance. Tube packaging is suitable for lower-volume applications or prototype work.

All three substitute parts are REACH compliant and carry MSL 1 rating, indicating no moisture sensitivity restrictions during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can SN74F02DR be used as a direct replacement for 74F02SJX?

A: Yes. Both parts are 4-channel 2-input NOR gates with identical electrical specifications, operating temperature range, and surface mount configuration. The package width difference (0.154" vs 0.209") represents standard 14-SOIC tolerance and does not affect electrical compatibility or PCB layout compatibility for standard designs.

Q: What is the difference between SN74F02D, SN74F02DR, and SN74F02NSR?

A: The three parts are electrically identical. The differences are packaging format (tube vs tape & reel) and package width tolerance. SN74F02D uses tube packaging for manual handling. SN74F02DR and SN74F02NSR use tape & reel for automated assembly. SN74F02NSR matches the original 0.209" package width, while SN74F02DR uses the narrower 0.154" width.

Q: Why is the 74F02SJX marked as obsolete?

A: The 74F02SJX is an onsemi product that has reached end-of-life status. Texas Instruments continues to manufacture functionally equivalent parts (SN74F02 series) with active product status and full compliance certifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All Texas Instruments substitute parts (SN74F02D, SN74F02DR, SN74F02NSR) are ROHS3 compliant. The original 74F02SJX does not specify RoHS status.

Q: What is the MSL rating and why does it matter?

A: All parts carry MSL 1 (Unlimited) rating, meaning they have no moisture sensitivity restrictions. These components can be stored and handled without special moisture control measures, simplifying supply chain and manufacturing processes.

Q: Can I mix different substitute part numbers in the same production run?

A: Yes. All substitute parts are electrically and functionally identical. However, for consistency and traceability, using a single part number per production batch is recommended as a best practice.

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