CD74HCT08M Equivalent & Substitute Parts

Part Overview

The CD74HCT08M is a 4-channel 2-input AND gate logic IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement. The CD74HCT08M operates within the 74HCT logic family standard, which defines compatible alternatives across multiple manufacturers based on electrical and mechanical specifications.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	4.5V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	4mA, 4mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	25ns @ 4.5V, 50pF
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Base Product Number	74HCT08
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD74HCT08M is determined by strict adherence to the 74HCT logic family standard. All substitute parts must maintain the following core parameters:

Logic type: AND Gate with 4 channels and 2 inputs per channel
Package type: 14-SOIC surface mount configuration
Supply voltage range: 4.5V ~ 5.5V (primary criterion; extended ranges are acceptable)
Input/output logic levels: 0.8V low, 2V high
Output current capability: 4mA minimum for both high and low states
Propagation delay: 25ns maximum @ 4.5V, 50pF load (or faster)
Operating temperature: -55°C ~ 125°C (or subset thereof)
RoHS3 compliance and MSL 1 rating

Substitute parts are grouped into three categories based on manufacturer and product status: direct manufacturer equivalents from Texas Instruments, manufacturer-recommended alternatives from onsemi, Nexperia, Diodes Incorporated, and Fairchild Semiconductor, and parametric equivalents that meet all electrical specifications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Supply	Quiescent Current (Max)	Output Current (High, Low)	Propagation Delay @ 4.5V/5V	Operating Temp	Package
CD74HCT08M	Texas Instruments	Discontinued at DiGi Electronics	4.5V ~ 5.5V	2 µA	4mA, 4mA	25ns @ 4.5V	-55°C ~ 125°C	14-SOIC
CD74HCT08M96	Texas Instruments	Active	4.5V ~ 5.5V	2 µA	4mA, 4mA	25ns @ 4.5V	-55°C ~ 125°C	14-SOIC
SN74HCT08D	Texas Instruments	Discontinued at DiGi Electronics	4.5V ~ 5.5V	2 µA	4mA, 4mA	22ns @ 5.5V	-40°C ~ 85°C	14-SOIC
MC74HCT08ADR2G	onsemi	Active	2V ~ 6V	1 µA	4mA, 4mA	17ns @ 5V	-55°C ~ 125°C	14-SOIC
MM74HCT08M	Fairchild Semiconductor	Active	4.5V ~ 5.5V	2 µA	4.8mA, 4.8mA	18ns @ 5V	-40°C ~ 85°C	14-SOIC
74HCT08D,653	Nexperia USA Inc.	Active	4.5V ~ 5.5V	2 µA	4mA, 4mA	24ns @ 4.5V	-40°C ~ 125°C	14-SOIC
74HCT08D/AUJ	Nexperia USA Inc.	Active	4.5V ~ 5.5V	2 µA	4mA, 5.2mA	24ns @ 4.5V	-40°C ~ 125°C	14-SOIC
74HCT08S14-13	Diodes Incorporated	Active	4.5V ~ 5.5V	20 µA	4mA, 4mA	24ns @ 4.5V	-40°C ~ 125°C	14-SOIC
MC74HCT08ADG	onsemi	Obsolete	2V ~ 6V	1 µA	4mA, 4mA	17ns @ 5V	-55°C ~ 125°C	14-SOIC
MM74HCT08MX	Fairchild Semiconductor	Active	4.5V ~ 5.5V	2 µA	4.8mA, 4.8mA	18ns @ 5V	-40°C ~ 85°C	14-SOIC
CD74HCT08ME4	Texas Instruments	Discontinued at DiGi Electronics	4.5V ~ 5.5V	2 µA	4mA, 4mA	25ns @ 4.5V	-55°C ~ 125°C	14-SOIC

Engineering Selection Recommendations

For active procurement, CD74HCT08M96 is the primary direct equivalent from Texas Instruments, maintaining identical electrical specifications and extended temperature range (-55°C ~ 125°C). This part is currently in active status with substantial inventory availability.

For designs requiring extended supply voltage range (2V ~ 6V) and lower quiescent current (1 µA), MC74HCT08ADR2G from onsemi provides superior performance characteristics while maintaining the 74HCT logic family standard and -55°C ~ 125°C operating range. This part is active and RoHS3 compliant.

For applications with relaxed temperature requirements (-40°C ~ 85°C), alternatives from Nexperia (74HCT08D,653, 74HCT08D/AUJ) and Fairchild Semiconductor (MM74HCT08M, MM74HCT08MX) are available. Nexperia parts are currently active. Fairchild parts offer enhanced output current capability (4.8mA vs 4mA).

MC74HCT08ADG from onsemi is obsolete and should not be selected for new designs despite meeting electrical specifications.

All recommended substitutes maintain RoHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT08M96 be used as a direct replacement for CD74HCT08M?

A: Yes. CD74HCT08M96 is the active equivalent from Texas Instruments with identical electrical specifications, supply voltage range (4.5V ~ 5.5V), logic levels, output current, and propagation delay. The primary difference is packaging format (Cut Tape & Digi-Reel vs. Tube) and product status (Active vs. Discontinued).

Q: What is the difference between MC74HCT08ADR2G and MC74HCT08ADG?

A: Both are onsemi 74HCT08 AND gates in 14-SOIC packages with identical logic specifications. MC74HCT08ADR2G is active and available in Tape & Reel packaging. MC74HCT08ADG is obsolete. MC74HCT08ADR2G should be selected for new designs. Both support extended supply voltage (2V ~ 6V) and lower quiescent current (1 µA).

Q: Are Nexperia 74HCT08D,653 and 74HCT08D/AUJ interchangeable?

A: Both are Nexperia 74HCT08 AND gates meeting core 74HCT specifications. 74HCT08D/AUJ has slightly higher output low current (5.2mA vs 4mA). Both are active and support -40°C ~ 125°C operating range. Selection depends on packaging availability and output current requirements.

Q: Why does MC74HCT08ADR2G have a wider supply voltage range (2V ~ 6V) than the CD74HCT08M (4.5V ~ 5.5V)?

A: onsemi's MC74HCT08ADR2G is designed to operate across a broader supply voltage range while maintaining 74HCT logic family compatibility. The CD74HCT08M is specified for standard 5V logic operation (4.5V ~ 5.5V). Both meet the same input/output logic levels and propagation delay requirements at their respective operating points.

Q: Can Fairchild MM74HCT08M or MM74HCT08MX be used in place of CD74HCT08M?

A: Yes, with temperature range consideration. Both Fairchild parts meet electrical specifications and 14-SOIC packaging requirements. However, they are specified for -40°C ~ 85°C operation, which is narrower than CD74HCT08M (-55°C ~ 125°C). Use Fairchild parts only if your application operates within -40°C ~ 85°C. Both offer enhanced output current (4.8mA vs 4mA).

Q: What does "Discontinued at DiGi Electronics" mean for CD74HCT08M?

A: The part is no longer actively stocked or distributed through DiGi Electronics. Existing inventory may be available from other distributors or secondary sources. For new designs, select an active equivalent such as CD74HCT08M96 or MC74HCT08ADR2G.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the CD74HCT08M specifications. This ensures compatibility with standard manufacturing processes and storage requirements.

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