CD74AC02MG4 Equivalent & Substitute Parts

Part Overview

The CD74AC02MG4 is a NOR Gate IC featuring 4 channels with 2 inputs per channel in a 14-SOIC surface mount package. Manufactured by Texas Instruments, this logic component operates across a supply voltage range of 1.5V to 5.5V with a maximum propagation delay of 11.5ns at 5V with 50pF load. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent substitute components that maintain functional and electrical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	1.5V ~ 5.5V
Current - Quiescent (Max)	4 µA
Current - Output High, Low	24mA, 24mA
Max Propagation Delay @ 5V, 50pF	11.5ns
Operating Temperature	-55°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the CD74AC02MG4 is determined by strict equivalence across the following critical parameters: logic type (NOR Gate), circuit count (4 channels), input count (2 inputs per channel), package type (14-SOIC), and mounting method (surface mount). All substitute parts must maintain the same functional configuration and physical footprint to ensure direct replacement capability.

The substitute parts are grouped into two categories based on electrical operating ranges and product status:

Category 1: Texas Instruments Direct Substitutes - Parts CD74AC02M96 and CD74AC02M maintain identical electrical specifications and supply voltage range (1.5V ~ 5.5V) as the main part. CD74AC02M96 is currently active with expanded inventory availability.

Category 2: onsemi Functional Equivalents - Parts MC74AC02DR2G and MC74AC02DG operate within a slightly different supply voltage range (2V ~ 6V) and exhibit improved propagation delay performance (6.5ns vs 11.5ns). Both are active products with full RoHS3 compliance.

Parameter Comparison

Parameter	CD74AC02MG4	CD74AC02M96	CD74AC02M	MC74AC02DR2G	MC74AC02DG
Manufacturer	Texas Instruments	Texas Instruments	Harris Corporation	onsemi	onsemi
Logic Type	NOR Gate	NOR Gate	NOR Gate	NOR Gate	NOR Gate
Number of Circuits	4	4	4	4	4
Number of Inputs	2	2	2	2	2
Voltage - Supply	1.5V ~ 5.5V	1.5V ~ 5.5V	1.5V ~ 5.5V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Max)	4 µA	4 µA	4 µA	4 µA	4 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Max Propagation Delay @ 5V, 50pF	11.5ns	11.5ns	11.5ns	6.5ns	6.5ns
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Discontinued	Active	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring direct electrical and thermal specification equivalence with the original CD74AC02MG4, CD74AC02M96 is the primary substitute. This part maintains identical supply voltage range (1.5V ~ 5.5V), propagation delay (11.5ns), and operating temperature range (-55°C ~ 125°C) while offering active product status and superior inventory availability (5933 units in stock).

CD74AC02M is available as a secondary option but carries obsolete product status and lacks RoHS3 compliance, limiting its suitability for new designs or applications with environmental compliance requirements.

MC74AC02DR2G and MC74AC02DG from onsemi provide functional equivalence with enhanced performance characteristics. Both parts deliver faster propagation delay (6.5ns) and maintain ROHS3 compliance. However, the operating temperature range is narrower (-40°C ~ 85°C) and the supply voltage minimum is higher (2V vs 1.5V). These parts are suitable for applications operating within the 2V to 5.5V overlap range and standard industrial temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can CD74AC02M96 be used as a direct replacement for CD74AC02MG4?

A: Yes. CD74AC02M96 maintains identical electrical specifications including supply voltage range (1.5V ~ 5.5V), propagation delay (11.5ns at 5V, 50pF), operating temperature range (-55°C ~ 125°C), and 14-SOIC package configuration. The primary difference is packaging format (Cut Tape & Digi-Reel vs standard packaging) and active product status.

Q: What are the key differences between Texas Instruments and onsemi substitutes?

A: Texas Instruments substitutes (CD74AC02M96, CD74AC02M) maintain the original 1.5V ~ 5.5V supply voltage range and 11.5ns propagation delay. onsemi parts (MC74AC02DR2G, MC74AC02DG) operate within 2V ~ 6V supply range with improved 6.5ns propagation delay but narrower operating temperature range (-40°C ~ 85°C vs -55°C ~ 125°C).

Q: Are all substitute parts RoHS3 compliant?

A: CD74AC02M96, MC74AC02DR2G, and MC74AC02DG are ROHS3 compliant. CD74AC02M is RoHS non-compliant and should not be used in applications with environmental compliance requirements.

Q: Do the onsemi parts require circuit redesign?

A: No redesign is required for applications operating within the 2V to 5.5V supply voltage overlap and -40°C to 85°C temperature range. The faster propagation delay (6.5ns) of onsemi parts may improve timing performance in existing circuits without modification.

Q: What packaging options are available for substitutes?

A: CD74AC02M96 is supplied in Cut Tape & Digi-Reel format. MC74AC02DR2G is supplied in Tape & Reel. MC74AC02DG is supplied in Tube. All maintain the same 14-SOIC physical footprint for PCB compatibility.

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