SN74AC04D Equivalent & Substitute Parts

Part Overview

The SN74AC04D is a 6-channel inverter logic IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The SN74AC04D operates across a 2V to 6V supply voltage range with 7ns maximum propagation delay at 5V with 50pF load, suitable for general-purpose digital logic inversion in AC-compatible systems.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	24mA, 24mA
Input Logic Level - Low	0.9V ~ 1.65V
Input Logic Level - High	2.1V ~ 3.85V
Max Propagation Delay @ V, Max CL	7ns @ 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

Substitution for the SN74AC04D is determined by strict equivalence across the following critical parameters:

Logic Type: Inverter (6-channel, 1 input per channel)
Package: 14-SOIC surface mount form factor
Voltage Supply Range: 2V ~ 6V
Operating Temperature: -40°C ~ 85°C
Output Current Capability: 24mA high and low
Input Logic Levels: 0.9V ~ 1.65V (low), 2.1V ~ 3.85V (high)
Propagation Delay: 7ns @ 5V, 50pF load
Compliance: ROHS3, MSL 1

Substitute parts are grouped into three categories based on packaging and quiescent current specifications:

MFR Recommended (Active Status, Cut Tape Packaging): SN74AC04DR and MC74AC04DR2G maintain identical electrical performance with active product status and optimized packaging for high-volume applications.

Direct Manufacturer Equivalent (Active Status, Cut Tape Packaging): 74AC04SCX from onsemi provides direct parametric equivalence with higher inventory availability.

Parametric Equivalents (Active Status, Tube Packaging): 74AC04SC and MC74AC04DG offer identical electrical specifications with tube packaging suitable for lower-volume requirements. MC74AC04DG specifies 4 µA quiescent current versus the 2 µA specification of the main part; this represents a minor operational difference within acceptable limits for most applications.

Parameter Comparison

Parameter	SN74AC04D (Main)	SN74AC04DR	74AC04SCX	MC74AC04DR2G	74AC04SC	MC74AC04DG
Manufacturer	Texas Instruments	Texas Instruments	onsemi	onsemi	onsemi	onsemi
Product Status	Discontinued	Active	Active	Active	Active	Active
Packaging	Tube	Cut Tape & Digi-Reel	Cut Tape & Digi-Reel	Cut Tape & Digi-Reel	Tube	Tube
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Max)	2 µA	2 µA	2 µA	4 µA	2 µA	4 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Input Logic Level - Low	0.9V ~ 1.65V	0.9V ~ 1.65V	0.9V ~ 1.65V	0.9V ~ 1.65V	0.9V ~ 1.65V	0.9V ~ 1.65V
Input Logic Level - High	2.1V ~ 3.85V	2.1V ~ 3.85V	2.1V ~ 3.85V	2.1V ~ 3.85V	2.1V ~ 3.85V	2.1V ~ 3.85V
Max Propagation Delay @ V, Max CL	7ns @ 5V, 50pF	7ns @ 5V, 50pF	7ns @ 5V, 50pF	7ns @ 5V, 50pF	7ns @ 5V, 50pF	7ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory Status	4321 Pcs	10100 Pcs	47750 Pcs	55500 Pcs	2200 Pcs	2916 Pcs

Engineering Selection Recommendations

For applications requiring immediate replacement of the discontinued SN74AC04D, the following selection criteria apply:

High-Volume Production: MC74AC04DR2G from onsemi offers the highest inventory availability (55,500 pcs) with active product status and cut tape packaging optimized for automated assembly. The 4 µA quiescent current specification represents a minor increase from the original 2 µA and does not affect functional compatibility in standard logic applications.

Texas Instruments Continuity: SN74AC04DR maintains the original manufacturer lineage with active status, 10,100 pcs inventory, and identical electrical specifications including 2 µA quiescent current. Cut tape and Digi-Reel packaging supports both high-volume and moderate-volume production requirements.

Balanced Availability: 74AC04SCX from onsemi provides the highest inventory level (47,750 pcs) with active product status and cut tape packaging. Electrical specifications are identical to the main part, including 2 µA quiescent current.

Tube Packaging Applications: 74AC04SC and MC74AC04DG are suitable for lower-volume applications or manual assembly processes. Both maintain active product status with tube packaging. 74AC04SC specifies 2 µA quiescent current, while MC74AC04DG specifies 4 µA.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical 14-SOIC package dimensions, ensuring direct mechanical and electrical compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can I use MC74AC04DR2G as a direct replacement for SN74AC04D?

A: Yes. MC74AC04DR2G is electrically and mechanically compatible. The 4 µA quiescent current specification is higher than the original 2 µA but remains within acceptable operating parameters for standard logic applications. The 14-SOIC package is identical, and all other electrical parameters match the original part.

Q: What is the difference between cut tape and tube packaging?

A: Cut tape and Digi-Reel packaging is optimized for high-volume automated assembly with continuous feed capability. Tube packaging is suitable for lower-volume applications and manual assembly. Both packaging formats contain identical die and electrical specifications. Selection depends on production volume and assembly equipment compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original SN74AC04D specifications.

Q: Why do some parts specify 4 µA quiescent current instead of 2 µA?

A: MC74AC04DR2G and MC74AC04DG specify 4 µA maximum quiescent current, which represents a minor operational difference from the original 2 µA specification. This difference does not affect functional logic performance and remains within acceptable limits for most applications. Selection between 2 µA and 4 µA specifications depends on power consumption requirements in battery-powered or low-power applications.

Q: Is the 14-SOIC package identical across all substitute parts?

A: Yes. All substitute parts use the 14-SOIC (0.154", 3.90mm Width) package with identical pin configuration and mechanical dimensions. No PCB layout modifications are required for substitution.

Q: Which substitute part has the best inventory availability?

A: MC74AC04DR2G from onsemi has the highest inventory availability at 55,500 pcs with active product status. 74AC04SCX follows with 47,750 pcs. Both are suitable for high-volume production requirements.

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