74F04SCX Equivalent & Substitute Parts

Part Overview

The 74F04SCX is a 6-channel inverter logic IC manufactured by onsemi in a 14-SOIC surface mount package. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The 74F04 series provides basic logic inversion functionality suitable for digital signal processing and logic circuit applications requiring fast propagation delays.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Voltage - Supply	4.5V ~ 5.5V
Current - Output High, Low	1mA, 20mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	5ns @ 5V, 50pF
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74F04SCX are qualified based on the following criteria:

Direct Substitutes maintain identical electrical and mechanical specifications:

Logic Type: Inverter
Number of Circuits: 6
Number of Inputs: 1
Voltage Supply Range: 4.5V ~ 5.5V
Output Current Ratings: 1mA, 20mA
Input Logic Levels: Low 0.8V, High 2V
Propagation Delay: 5ns @ 5V, 50pF
Operating Temperature: 0°C ~ 70°C
Mounting Type: Surface Mount
Package: 14-SOIC

Similar Substitutes maintain core electrical specifications but differ in package dimensions or quiescent current specifications. These parts are functionally equivalent for logic operation but require mechanical compatibility verification.

Parameter Comparison

Parameter	74F04SCX (onsemi)	SN74F04D (TI)	SN74F04DR (TI)	SN74F04NSR (TI)
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Last Time Buy	Active	Active
Logic Type	Inverter	Inverter	Inverter	Inverter
Number of Circuits	6	6	6	6
Number of Inputs	1	1	1	1
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Current - Output 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 @ V, Max CL	5ns @ 5V, 50pF	5ns @ 5V, 50pF	5ns @ 5V, 50pF	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
Supplier Device Package	14-SOIC	14-SOIC	14-SOIC	14-SO
Package / Case	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.209", 5.30mm Width)
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

SN74F04DR (Texas Instruments) is the primary recommended substitute. This part maintains active product status, ensuring long-term availability and supply chain stability. It is ROHS3 compliant and carries REACH Unaffected certification. The SN74F04DR is supplied in Tape & Reel packaging and matches all electrical and mechanical specifications of the 74F04SCX.

SN74F04D (Texas Instruments) serves as a secondary option with Last Time Buy status. This part is functionally equivalent but has limited future availability. It is ROHS3 compliant and suitable for applications where Tube packaging is acceptable.

SN74F04NSR (Texas Instruments) is classified as a similar substitute due to package dimension differences. The 14-SO package measures 0.209" width compared to the standard 0.154" width of the 14-SOIC package. This part is ROHS3 compliant and maintains active product status. Mechanical compatibility with existing PCB layouts must be confirmed before selection.

Frequently Asked Questions (FAQ)

Q: Can SN74F04DR directly replace 74F04SCX without circuit modifications?

A: Yes. The SN74F04DR maintains identical electrical specifications including supply voltage range (4.5V ~ 5.5V), output current ratings (1mA, 20mA), input logic levels (0.8V low, 2V high), and propagation delay (5ns @ 5V, 50pF). The 14-SOIC package dimensions are identical, allowing direct PCB substitution.

Q: What is the difference between SN74F04D and SN74F04DR?

A: Both parts are electrically identical. The primary difference is packaging format: SN74F04D is supplied in Tube packaging, while SN74F04DR is supplied in Tape & Reel format. SN74F04DR has active product status, whereas SN74F04D is Last Time Buy. For new designs, SN74F04DR is preferred.

Q: Can SN74F04NSR be used as a direct replacement?

A: SN74F04NSR is electrically equivalent but has different package dimensions. The 14-SO package is 0.209" wide compared to the standard 14-SOIC at 0.154" width. PCB layout compatibility must be verified. This part is suitable only if mechanical clearance permits the wider package footprint.

Q: Are all substitute parts RoHS compliant?

A: SN74F04D, SN74F04DR, and SN74F04NSR are all ROHS3 compliant. The original 74F04SCX RoHS status is not specified in available documentation.

Q: What is the moisture sensitivity level for these parts?

A: All parts, including the 74F04SCX and all Texas Instruments substitutes, have MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage and handling.

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