MC74AC00D NAND Gate IC Equivalent & Substitute Parts

Part Overview

The MC74AC00D is a 4-channel 2-input NAND gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement. The MC74AC00D operates across a 2V to 6V supply voltage range with 8ns maximum propagation delay at 5V with 50pF load, making it suitable for general-purpose digital logic applications requiring moderate switching speeds.

Key Parameters

Parameter	Value
Manufacturer Part Number	MC74AC00D
Manufacturer	onsemi
Logic Type	NAND Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	4 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	8ns @ 5V, 50pF
Operating Temperature	-55°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MC74AC00D is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Logic type: 4-channel 2-input NAND gate
Package type: 14-SOIC surface mount
Supply voltage range: Minimum 2V to 6V compatibility
Output current capability: 24mA minimum for both high and low states
Propagation delay: 8ns or faster at 5V with 50pF load
Input logic thresholds: Compatible with standard TTL/CMOS levels
Operating temperature range: Support for -55°C to 125°C or subset thereof

Substitution Categories:

Direct Equivalents (Identical Electrical and Package Specifications):

MC74AC00DG (onsemi) – Active product status, RoHS3 compliant, identical electrical parameters
SN74AC00D (Texas Instruments) – Discontinued at DiGi Electronics, identical electrical parameters, RoHS3 compliant
SN74AC00DR (Texas Instruments) – Active product status, RoHS3 compliant, identical electrical parameters

Compatible Substitutes (Equivalent Functionality, Minor Parameter Variations):

74AC00SCX (onsemi) – Active product status, RoHS3 compliant, quiescent current 2µA (lower than 4µA), operating temperature -40°C to 85°C (narrower range)
CD74AC00M96 (Texas Instruments) – Active product status, RoHS3 compliant, supply voltage 1.5V to 5.5V (broader range), propagation delay 7.3ns (faster), operating temperature -55°C to 125°C
CD74AC00M (Harris Corporation) – Obsolete, supply voltage 1.5V to 5.5V (broader range), propagation delay 7.3ns (faster), operating temperature -55°C to 125°C

Package Variant (Electrical Equivalent, Different Package):

SN74AC00NSR (Texas Instruments) – Active product status, RoHS3 compliant, 14-SO package (0.209", 5.30mm width) instead of 14-SOIC (0.154", 3.90mm width), identical electrical parameters

Parameter Comparison

Parameter	MC74AC00D	MC74AC00DG	SN74AC00D	SN74AC00DR	74AC00SCX	CD74AC00M96	CD74AC00M	SN74AC00NSR
Manufacturer	onsemi	onsemi	Texas Instruments	Texas Instruments	onsemi	Texas Instruments	Harris Corporation	Texas Instruments
Logic Type	NAND Gate	NAND Gate	NAND Gate	NAND Gate	NAND Gate	NAND Gate	NAND Gate	NAND Gate
Number of Circuits	4	4	4	4	4	4	4	4
Number of Inputs	2	2	2	2	2	2	2	2
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	1.5V ~ 5.5V	1.5V ~ 5.5V	2V ~ 6V
Current - Quiescent (Max)	4 µA	4 µA	2 µA	2 µA	2 µA	4 µA	4 µA	2 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	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	0.3V ~ 1.65V	0.3V ~ 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	1.2V ~ 3.85V	1.2V ~ 3.85V	2.1V ~ 3.85V
Max Propagation Delay @ V, Max CL	8ns @ 5V, 50pF	8ns @ 5V, 50pF	8ns @ 5V, 50pF	8ns @ 5V, 50pF	8ns @ 5V, 50pF	7.3ns @ 5V, 50pF	7.3ns @ 5V, 50pF	8ns @ 5V, 50pF
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SO (0.209", 5.30mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Discontinued at DiGi Electronics	Active	Active	Active	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS non-compliant	RoHS3 Compliant

Engineering Selection Recommendations

Recommended Primary Substitutes (Active Product Status, RoHS3 Compliant):

MC74AC00DG (onsemi) – Identical electrical and package specifications to MC74AC00D with active product status and RoHS3 compliance. This is the direct replacement from the original manufacturer.
SN74AC00DR (Texas Instruments) – Active product status with RoHS3 compliance. Identical electrical parameters and 14-SOIC package. Available in Cut Tape and Digi-Reel packaging.
SN74AC00NSR (Texas Instruments) – Active product status with RoHS3 compliance. Identical electrical parameters with 14-SO package variant (0.209" width vs. 0.154" width). Suitable for designs where package footprint differences are accommodated.

Secondary Substitutes (Active Product Status, Parameter Variations):

74AC00SCX (onsemi) – Active product status with RoHS3 compliance. Quiescent current reduced to 2µA (lower power consumption). Operating temperature range narrowed to -40°C to 85°C. Suitable for applications not requiring extended temperature range.
CD74AC00M96 (Texas Instruments) – Active product status with RoHS3 compliance. Supply voltage range expanded to 1.5V to 5.5V with faster propagation delay of 7.3ns. Maintains full -55°C to 125°C operating temperature range. Suitable for designs requiring lower supply voltage operation or faster switching.

Not Recommended for New Designs:

SN74AC00D (Texas Instruments) – Discontinued at DiGi Electronics; limited availability
CD74AC00M (Harris Corporation) – Obsolete product status; limited availability

Frequently Asked Questions (FAQ)

Q: Can MC74AC00D be directly replaced with MC74AC00DG?

A: Yes. MC74AC00DG is the direct equivalent from onsemi with identical electrical specifications, 14-SOIC package, and active product status. The primary difference is RoHS3 compliance (MC74AC00DG) versus RoHS non-compliance (MC74AC00D).

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

A: The 14-SOIC package has a 0.154" (3.90mm) body width, while the 14-SO package has a 0.209" (5.30mm) body width. Both are surface mount packages with identical pin counts and electrical characteristics. PCB footprints differ; verify layout compatibility before substitution.

Q: Are all substitute parts pin-compatible with MC74AC00D?

A: Yes. All listed substitutes maintain identical pin configurations for the 4-channel 2-input NAND gate function. Package width variations (14-SOIC vs. 14-SO) require PCB footprint verification but do not affect electrical pin compatibility.

Q: Which substitute offers the best availability?

A: SN74AC00DR (Texas Instruments) and 74AC00SCX (onsemi) show the highest inventory levels (2431 Pcs and 15865 Pcs respectively) with active product status and RoHS3 compliance.

Q: Can I use CD74AC00M96 in place of MC74AC00D?

A: Yes, with design considerations. CD74AC00M96 supports a broader supply voltage range (1.5V to 5.5V vs. 2V to 6V) and offers faster propagation delay (7.3ns vs. 8ns). It maintains the full -55°C to 125°C operating temperature range. Verify that your circuit design does not depend on the specific propagation delay or voltage thresholds of the original part.

Q: What is the impact of quiescent current differences?

A: Substitutes with 2µA quiescent current (SN74AC00D, SN74AC00DR, 74AC00SCX, SN74AC00NSR) consume less standby power than the original 4µA specification. This is beneficial for low-power applications and does not create compatibility issues.

Q: Are there any temperature range limitations I should consider?

A: Yes. Substitutes SN74AC00D, SN74AC00DR, 74AC00SCX, and SN74AC00NSR operate only to -40°C to 85°C, compared to the original -55°C to 125°C range. If your application requires extended temperature operation, use MC74AC00DG, CD74AC00M96, or CD74AC00M.

Q: What does RoHS3 compliance mean for my design?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations, restricting lead and other hazardous materials. For new designs and regulated applications, RoHS3 compliant substitutes (MC74AC00DG, SN74AC00D, SN74AC00DR, 74AC00SCX, CD74AC00M96, SN74AC00NSR) are required.

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