CD74ACT02M Equivalent & Substitute Parts

Part Overview

The CD74ACT02M is a 4-channel 2-input NOR gate logic IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This component is classified as Last Time Buy, indicating limited availability from the original manufacturer. The part operates within the 4.5V to 5.5V supply voltage range and is suitable for digital logic applications requiring NOR gate functionality. Due to its Last Time Buy status, identifying functionally equivalent substitute parts is necessary for design continuity and long-term component sourcing.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	4 µA
Current - Output High, Low	24mA, 24mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CD74ACT02M are qualified based on the following criteria:

Logic Type: NOR Gate with 4 channels and 2 inputs per channel
Package: 14-SOIC surface mount form factor
Voltage Supply Range: 4.5V ~ 5.5V
Output Drive Capability: 24mA high and low
Input Logic Levels: 0.8V low threshold, 2V high threshold
Quiescent Current: 4 µA maximum
Base Product Number: 74ACT02 series

All substitute parts listed maintain electrical compatibility within these core parameters. Variations in propagation delay and operating temperature range are noted where they differ from the main part specification.

Parameter Comparison

Parameter	CD74ACT02M (TI)	CD74ACT02M96 (Harris)	MC74ACT02DR2G (onsemi)	MC74ACT02DG (onsemi)
Manufacturer	Texas Instruments	Harris Corporation	onsemi	onsemi
Logic Type	NOR Gate	NOR Gate	NOR Gate	NOR Gate
Number of Circuits	4	4	4	4
Number of Inputs	2	2	2	2
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Current - Quiescent (Max)	4 µA	4 µA	4 µA	4 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Input Logic Level - Low	0.8V	0.8V	0.8V	0.8V
Input Logic Level - High	2V	2V	2V	2V
Max Propagation Delay @ 5V, 50pF	12.2ns	12.2ns	9.5ns	9.5ns
Operating Temperature	-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
Packaging Format	Tube	Bulk	Tape & Reel	Tube
Product Status	Last Time Buy	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring the CD74ACT02M NOR gate logic IC, the following selection criteria apply:

Active Product Status: MC74ACT02DR2G and MC74ACT02DG from onsemi are both classified as Active products, ensuring continued availability and manufacturer support. These parts are preferred for new designs and long-term production requirements.

RoHS Compliance: MC74ACT02DR2G and MC74ACT02DG maintain ROHS3 compliance, consistent with the original CD74ACT02M specification. CD74ACT02M96 is RoHS non-compliant and should not be selected for applications with RoHS requirements.

Operating Temperature Range: The CD74ACT02M and CD74ACT02M96 support the extended temperature range of -55°C to 125°C. MC74ACT02DR2G and MC74ACT02DG operate within -40°C to 85°C. Selection depends on application temperature requirements.

Propagation Delay: MC74ACT02DR2G and MC74ACT02DG offer improved propagation delay of 9.5ns compared to 12.2ns for the CD74ACT02M and CD74ACT02M96, providing faster logic switching performance.

Packaging Format: MC74ACT02DG in Tube format matches the original CD74ACT02M packaging. MC74ACT02DR2G is supplied in Tape & Reel format for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT02DR2G and MC74ACT02DG be used as direct replacements for CD74ACT02M?

A: Yes, both onsemi parts are electrically compatible substitutes. They maintain identical logic type, channel count, input count, supply voltage range, quiescent current, output drive capability, and input logic levels. The primary differences are product status (Active vs. Last Time Buy), operating temperature range, and propagation delay performance.

Q: What is the significance of the operating temperature range difference?

A: CD74ACT02M supports -55°C to 125°C, while MC74ACT02DR2G and MC74ACT02DG support -40°C to 85°C. Applications requiring operation below -40°C or above 85°C must use the CD74ACT02M or CD74ACT02M96. For standard industrial and commercial temperature ranges, the onsemi parts are suitable.

Q: Why is CD74ACT02M96 not recommended despite electrical compatibility?

A: CD74ACT02M96 is classified as Obsolete and is RoHS non-compliant. While electrically compatible, its obsolete status limits future availability, and RoHS non-compliance may conflict with regulatory or customer requirements.

Q: Does the improved propagation delay of MC74ACT02DR2G and MC74ACT02DG affect circuit design?

A: The 9.5ns propagation delay of the onsemi parts is faster than the 12.2ns specification of the CD74ACT02M. This improvement does not create compatibility issues; circuits designed for 12.2ns will function correctly with the faster parts. Applications with tight timing constraints may benefit from the improved performance.

Q: What packaging considerations apply when selecting a substitute?

A: All substitute parts use the 14-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm width). Packaging format differs: CD74ACT02M and MC74ACT02DG are supplied in Tube format, while MC74ACT02DR2G is supplied in Tape & Reel format. Selection depends on assembly process requirements and inventory management preferences.

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