74F02SCX NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74F02SCX is a 4-channel 2-input NOR gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74F02 series represents a standard logic function with consistent electrical characteristics across qualified manufacturers, enabling direct substitution based on matching electrical parameters and package specifications.

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
Package Type	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74F02SCX is determined by strict equivalence across the following critical parameters:

Direct Substitutes (Identical Electrical & Package Specifications):

Logic function: 4-channel 2-input NOR gate
Voltage supply: 4.5V ~ 5.5V
Output current ratings: 1mA high, 20mA low
Input logic levels: 0.8V low, 2V high
Propagation delay: 5.5ns @ 5V, 50pF
Operating temperature: 0°C ~ 70°C
Package: 14-SOIC with 0.154" (3.90mm) width
Mounting: Surface mount

Similar Substitutes (Equivalent Electrical, Package Variation):

All electrical parameters identical to direct substitutes
Package variation: 14-SO with 0.209" (5.30mm) width
Functional compatibility maintained; physical footprint differs

Parameter Comparison

Parameter	74F02SCX (onsemi)	SN74F02D (TI)	SN74F02DR (TI)	SN74F02NSR (TI)
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Last Time Buy	Active	Active
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 (H/L)	1mA / 20mA	1mA / 20mA	1mA / 20mA	1mA / 20mA
Input Logic Levels (L/H)	0.8V / 2V	0.8V / 2V	0.8V / 2V	0.8V / 2V
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
Package / Case	14-SOIC (3.90mm)	14-SOIC (3.90mm)	14-SOIC (3.90mm)	14-SO (5.30mm)
Packaging Format	-	Tube	Tape & Reel	Tape & Reel
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	MSL 1	MSL 1	MSL 1	MSL 1
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (Identical Footprint): SN74F02DR is the preferred choice. This Texas Instruments part maintains active product status, carries ROHS3 compliance certification, and is available in high volume (15,091 pcs in stock) in tape & reel packaging. Electrical parameters are fully equivalent to the 74F02SCX.

For Alternative Packaging (Tube Format): SN74F02D provides equivalent electrical performance with last-time-buy status from Texas Instruments. This option is suitable when tube packaging meets procurement requirements. ROHS3 compliance and REACH unaffected status are maintained.

For Package Footprint Variation (Wider 14-SO): SN74F02NSR is functionally equivalent with all electrical parameters matching the 74F02SCX. The 14-SO package (5.30mm width) differs from the standard 14-SOIC (3.90mm width). This substitution requires PCB layout verification to confirm physical compatibility. Active product status and ROHS3 compliance are confirmed.

Frequently Asked Questions (FAQ)

Q: Can SN74F02DR be used as a direct replacement for 74F02SCX? A: Yes. SN74F02DR matches all electrical specifications, operating parameters, and package dimensions (14-SOIC, 3.90mm width). Pin configuration and functional behavior are identical.

Q: What is the difference between SN74F02D and SN74F02DR? A: Both parts are electrically identical. The primary difference is packaging format: SN74F02D is supplied in tube packaging, while SN74F02DR is supplied in tape & reel format. SN74F02DR has active product status; SN74F02D is last-time-buy.

Q: Is SN74F02NSR compatible with the 74F02SCX? A: SN74F02NSR is functionally and electrically equivalent. However, the package differs: 14-SO (5.30mm width) versus 14-SOIC (3.90mm width). Physical footprint compatibility must be verified against your PCB layout before selection.

Q: Are there compliance or regulatory differences between these substitutes? A: All substitute parts carry ROHS3 compliance and REACH unaffected status. Moisture sensitivity level (MSL 1) is consistent across all options. No regulatory barriers exist for substitution.

Q: What is the significance of product status (Active vs. Last Time Buy vs. Obsolete)? A: Active status (SN74F02DR, SN74F02NSR) indicates ongoing production and long-term availability. Last Time Buy (SN74F02D) indicates limited future availability. Obsolete (74F02SCX) indicates discontinued production. For new designs or long-term procurement, active-status parts are recommended.

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