SN74HCT04D Equivalent & Substitute Parts

Part Overview

The SN74HCT04D is a 6-channel inverter logic IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This part is discontinued at DiGi Electronics but remains available through inventory stock of 12,600 units. The SN74HCT04D performs basic logic inversion functions across six independent channels, making it suitable for signal conditioning and logic level conversion applications in digital circuits operating at 4.5V to 5.5V supply voltage.

Due to the discontinued status of the SN74HCT04D, equivalent substitute parts from active manufacturers are necessary to ensure long-term design continuity and supply chain reliability. Suitable alternatives maintain identical functional specifications, electrical parameters, and package compatibility while offering active product status from multiple semiconductor manufacturers.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	4mA, 4mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	18ns @ 5.5V, 50pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74HCT04D are qualified based on the following criteria:

Functional Equivalence: All substitute parts maintain identical logic type (Inverter), circuit count (6 channels), and input configuration (1 input per channel).

Electrical Compatibility: Supply voltage range (4.5V ~ 5.5V), input logic levels (Low: 0.8V, High: 2V), and output current specifications (4mA minimum) are preserved across all qualified substitutes.

Package Compatibility: All substitutes use 14-SOIC or 14-SO surface mount packages with 0.154" (3.90mm) width, ensuring direct PCB footprint compatibility.

Compliance Standards: All substitutes maintain ROHS3 compliance and MSL Level 1 rating, meeting environmental and moisture sensitivity requirements.

Propagation Delay: Substitute parts specify maximum propagation delays ranging from 17ns to 22ns at specified voltage and load conditions, all within acceptable timing margins for standard logic applications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Supply	Current - Quiescent (Max)	Current - Output High, Low	Max Propagation Delay @ V, Max CL	Operating Temperature	Package
SN74HCT04D	Texas Instruments	Discontinued	4.5V ~ 5.5V	2 µA	4mA, 4mA	18ns @ 5.5V, 50pF	-40°C ~ 85°C	14-SOIC
SN74HCT04DR	Texas Instruments	Active	4.5V ~ 5.5V	2 µA	4mA, 4mA	18ns @ 5.5V, 50pF	-40°C ~ 85°C	14-SOIC
MC74HCT04ADR2G	onsemi	Active	4.5V ~ 5.5V	1 µA	4mA, 4mA	17ns @ 5V, 50pF	-55°C ~ 125°C	14-SOIC
MM74HCT04M	Fairchild Semiconductor	Active	4.5V ~ 5.5V	2 µA	4.8mA, 4.8mA	20ns @ 5V, 50pF	-40°C ~ 85°C	14-SOIC
MM74HCT04MX	Fairchild Semiconductor	Active	4.5V ~ 5.5V	2 µA	4.8mA, 4.8mA	20ns @ 5V, 50pF	-40°C ~ 85°C	14-SOIC
74HCT04D,653	Nexperia USA Inc.	Active	4.5V ~ 5.5V	2 µA	4mA, 4mA	19ns @ 4.5V, 50pF	-40°C ~ 125°C	14-SO
74HCT04D-Q100,118	Nexperia USA Inc.	Active	4.5V ~ 5.5V	2 µA	4mA, 4mA	19ns @ 4.5V, 50pF	-40°C ~ 125°C	14-SO
74HCT04S14-13	Diodes Incorporated	Active	4.5V ~ 5.5V	20 µA	4mA, 5.2mA	22ns @ 4.5V, 50pF	-40°C ~ 125°C	14-SO
MC74HCT04ADG	onsemi	Active	4.5V ~ 5.5V	1 µA	4mA, 4mA	17ns @ 5V, 50pF	-55°C ~ 125°C	14-SOIC

Engineering Selection Recommendations

Primary Recommendation - SN74HCT04DR (Texas Instruments): This part maintains identical electrical specifications and operating temperature range to the original SN74HCT04D while offering active product status from the original manufacturer. It is available in Cut Tape and Digi-Reel packaging with 4,226 units in stock. This option provides the lowest risk for direct replacement in existing designs.

Extended Temperature Range Option - MC74HCT04ADR2G or MC74HCT04ADG (onsemi): These parts offer superior quiescent current performance (1 µA vs. 2 µA) and extended operating temperature range (-55°C ~ 125°C). The MC74HCT04ADR2G is supplied in Tape & Reel packaging with 3,412 units in stock, while MC74HCT04ADG is supplied in Tube packaging with 3,738 units in stock. These options are suitable for applications requiring enhanced thermal performance or lower power consumption.

Automotive Grade Option - 74HCT04D-Q100,118 (Nexperia USA Inc.): This part carries AEC-Q100 automotive qualification and extended operating temperature range (-40°C ~ 125°C). It is available in Tape & Reel packaging with 1,069 units in stock. This option is required for automotive or mission-critical applications.

High Inventory Availability - MM74HCT04MX (Fairchild Semiconductor): This part offers the highest inventory availability with 18,875 units in stock. It maintains the original operating temperature range and electrical specifications with slightly higher output current capability (4.8mA vs. 4mA). This option is suitable for high-volume production requirements.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SN74HCT04D with SN74HCT04DR?

A: Yes. The SN74HCT04DR is a direct functional equivalent with identical electrical specifications, operating temperature range, and 14-SOIC package. The primary difference is packaging format (Cut Tape/Digi-Reel vs. Tube) and active product status.

Q: What is the difference between 14-SOIC and 14-SO packages?

A: Both packages are physically compatible with identical 0.154" (3.90mm) width and pin configuration. The designations reflect different manufacturing standards but are interchangeable for PCB assembly purposes.

Q: Are the onsemi parts (MC74HCT04ADR2G, MC74HCT04ADG) fully compatible?

A: Yes, with performance advantages. These parts maintain all electrical compatibility while offering lower quiescent current (1 µA vs. 2 µA) and extended operating temperature range (-55°C ~ 125°C vs. -40°C ~ 85°C). Propagation delay is also improved (17ns vs. 18ns).

Q: Why does 74HCT04S14-13 specify higher quiescent current (20 µA)?

A: The 74HCT04S14-13 from Diodes Incorporated specifies 20 µA maximum quiescent current, which is higher than other substitutes. This part remains functionally compatible but may result in increased power consumption in standby conditions. Verify power budget requirements before selection.

Q: Is the automotive-grade 74HCT04D-Q100,118 necessary for my application?

A: The automotive-grade variant is required only for applications subject to automotive qualification standards (AEC-Q100). For standard industrial or consumer applications, non-automotive variants are sufficient.

Q: What inventory levels should I consider for production planning?

A: Current inventory levels range from 1,069 to 18,875 units across available substitutes. For high-volume production, MM74HCT04MX offers the highest availability (18,875 units). For standard requirements, SN74HCT04DR (4,226 units) or onsemi variants (3,412-3,738 units) provide adequate stock.

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