MC74HC00AF NAND Gate IC Equivalent & Substitute Parts

Part Overview

The MC74HC00AF 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, making equivalent and substitute parts necessary for ongoing design support and procurement. The MC74HC00AF operates across a 2V to 6V supply voltage range with a maximum propagation delay of 13ns at 6V with 50pF load. Substitute parts must maintain functional equivalence in logic operation, pin configuration, and electrical performance within the 74HC00 logic family.

Key Parameters

Parameter	Value
Logic Type	NAND Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	1 µA
Current - Output High, Low	5.2mA, 5.2mA
Input Logic Level - Low	0.5V ~ 1.8V
Input Logic Level - High	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	13ns
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm Width)
Base Product Number	74HC00
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the MC74HC00AF is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Criteria:

Logic Type: Must be NAND Gate
Number of Circuits: Must be 4
Number of Inputs: Must be 2 per circuit
Voltage - Supply: Must support 2V ~ 6V range
Current - Output High, Low: Must be 5.2mA, 5.2mA
Input Logic Level - Low: Must be 0.5V ~ 1.8V
Input Logic Level - High: Must be 1.5V ~ 4.2V
Mounting Type: Must be Surface Mount
Base Product Number: Must be 74HC00 logic family
Package / Case: Must be 14-SOIC configuration

Substitute parts are grouped into two categories: Active Status parts (recommended for new designs) and Discontinued/Obsolete Status parts (available for legacy system support). All listed substitutes maintain identical logic functionality and pin compatibility with the MC74HC00AF.

Parameter Comparison

Part Number	Manufacturer	Voltage - Supply	Current - Quiescent (Max)	Current - Output High, Low	Max Propagation Delay @ 6V, 50pF	Operating Temperature	Package / Case	Product Status	RoHS Status
MC74HC00AF	onsemi	2V ~ 6V	1 µA	5.2mA, 5.2mA	13ns	-55°C ~ 125°C	14-SOIC (0.209", 5.30mm)	Obsolete	RoHS non-compliant
MM74HC00M	onsemi	2V ~ 6V	2 µA	5.2mA, 5.2mA	15ns	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm)	Active	ROHS3 Compliant
MM74HC00MX	Fairchild Semiconductor	2V ~ 6V	2 µA	5.2mA, 5.2mA	15ns	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm)	Active	Not specified
SN74HC00NSR	Texas Instruments	2V ~ 6V	2 µA	5.2mA, 5.2mA	15ns	-40°C ~ 85°C	14-SOIC (0.209", 5.30mm)	Active	ROHS3 Compliant
74HC00D,653	Nexperia USA Inc.	2V ~ 6V	40 µA	5.2mA, 5.2mA	7ns	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Active	ROHS3 Compliant
CD74HC00M	Harris Corporation	2V ~ 6V	2 µA	5.2mA, 5.2mA	15ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Obsolete	RoHS non-compliant
CD74HC00M96	Texas Instruments	2V ~ 6V	2 µA	5.2mA, 5.2mA	15ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Active	ROHS3 Compliant
CD74HC00MT	Texas Instruments	2V ~ 6V	2 µA	5.2mA, 5.2mA	15ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Discontinued at DiGi Electronics	ROHS3 Compliant
SN74HC00D	Texas Instruments	2V ~ 6V	2 µA	5.2mA, 5.2mA	15ns	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm)	Discontinued at DiGi Electronics	ROHS3 Compliant
SN74HC00DG4	Texas Instruments	2V ~ 6V	2 µA	5.2mA, 5.2mA	15ns	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm)	Discontinued at DiGi Electronics	ROHS3 Compliant
SN74HC00DR	Texas Instruments	2V ~ 6V	2 µA	5.2mA, 5.2mA	15ns	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

For New Designs (Active Status Parts):

SN74HC00DR (Texas Instruments) is the primary recommendation for new designs. This part maintains full electrical compatibility with the MC74HC00AF across all critical parameters, carries ROHS3 compliance certification, and has unlimited moisture sensitivity level rating. With 178,195 units in stock, supply continuity is assured. The 14-SOIC (0.154", 3.90mm Width) package is the industry standard for this logic family.

MM74HC00M (onsemi) provides an alternative from the original manufacturer with active product status and ROHS3 compliance. This part is suitable for designs where onsemi sourcing is preferred.

74HC00D,653 (Nexperia USA Inc.) offers superior propagation delay performance at 7ns compared to the MC74HC00AF baseline of 13ns, with extended operating temperature range to -40°C ~ 125°C and ROHS3 compliance. This part is appropriate for timing-critical applications.

For Legacy System Support (Discontinued/Obsolete Status Parts):

CD74HC00M96 and CD74HC00MT (Texas Instruments) maintain the extended operating temperature range of -55°C ~ 125°C matching the MC74HC00AF, with ROHS3 compliance. These parts are suitable for replacement in existing systems requiring temperature performance equivalent to the original part.

CD74HC00M (Harris Corporation) provides obsolete-status compatibility with identical temperature range (-55°C ~ 125°C) but carries RoHS non-compliant status, limiting use to legacy applications where RoHS compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can I use SN74HC00DR as a direct replacement for MC74HC00AF?

A: Yes. SN74HC00DR maintains all critical electrical parameters: 2V ~ 6V supply voltage, 5.2mA output current, identical input logic levels, and 14-SOIC surface mount packaging. The 15ns propagation delay at 6V with 50pF load is within acceptable tolerance for 74HC00 logic family applications. Operating temperature range is -40°C ~ 85°C versus the MC74HC00AF's -55°C ~ 125°C; verify your application's temperature requirements before selection.

Q: What is the difference between the 14-SOIC (0.209", 5.30mm Width) and 14-SOIC (0.154", 3.90mm Width) packages?

A: Both are 14-pin SOIC surface mount packages with identical pin pitch and electrical connectivity. The width difference reflects manufacturing variations across suppliers. The narrower 3.90mm width is the current industry standard. Both packages are mechanically and electrically interchangeable on PCBs designed for standard 14-SOIC footprints. Verify your PCB layout accommodates the specific package width if space constraints exist.

Q: Why does 74HC00D,653 show 40 µA quiescent current versus 1-2 µA for other parts?

A: The 74HC00D,653 specification reflects Nexperia's measurement methodology and may include different test conditions than other manufacturers. All listed parts meet the 74HC00 logic family functional requirements. For power-sensitive applications, compare detailed datasheets from each manufacturer to confirm quiescent current specifications under your specific operating conditions.

Q: Is RoHS compliance required for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and many other markets. All active-status substitute parts listed (SN74HC00DR, MM74HC00M, CD74HC00M96, CD74HC00MT, 74HC00D,653) carry ROHS3 certification. The original MC74HC00AF is RoHS non-compliant; substitution with a ROHS3-compliant part is necessary for regulatory compliance in restricted markets.

Q: Can I use parts with -40°C ~ 85°C operating temperature in applications requiring -55°C operation?

A: No. Operating temperature range is a critical specification. If your application requires operation at -55°C, select only parts with extended temperature range: CD74HC00M96, CD74HC00MT, or 74HC00D,653. Using parts rated only to -40°C minimum in -55°C environments may result in logic failures or unpredictable behavior.

Q: What packaging options are available for the 74HC00 logic family?

A: All substitute parts listed are supplied in 14-SOIC surface mount packages. Packaging options differ by supplier: Cut Tape (CT) & Digi-Reel, Tube, and Tape & Reel (TR). These represent different quantity and delivery formats from the same manufacturer, not different physical packages. Verify your assembly process requirements (reel-fed, tube-fed, or cut-tape) when selecting a specific part number variant.

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