CD74HCT08ME4 Equivalent & Substitute Parts

Part Overview

The CD74HCT08ME4 is a 4-channel AND gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The 74HCT08 series provides standard AND gate functionality across multiple manufacturers, with several active alternatives available that maintain electrical and mechanical compatibility.

Substiute Parts

CD74HCT08ME4

Texas InstrumentsIn Stock: 854CD74HCT08ME4 Datasheet

Current PartRFQ

CD74HCT08M96

Texas InstrumentsIn Stock: 27724CD74HCT08M96 Datasheet

DirectRFQ

CD74HCT08M

Harris CorporationIn Stock: 1565CD74HCT08M Datasheet

MFR RecommendedRFQ

MC74HCT08ADR2G

onsemiIn Stock: 1455MC74HCT08ADR2G Datasheet

DirectRFQ

74HCT08D/AUJ

Nexperia USA Inc.In Stock: 85074HCT08D/AUJ Datasheet

MFR RecommendedRFQ

74HCT08S14-13

Diodes IncorporatedIn Stock: 134274HCT08S14-13 Datasheet

MFR RecommendedRFQ

MC74HCT08ADG

onsemiIn Stock: 1096MC74HCT08ADG Datasheet

MFR RecommendedRFQ

MM74HCT08M

Fairchild SemiconductorIn Stock: 1559MM74HCT08M Datasheet

MFR RecommendedRFQ

MM74HCT08MX

Fairchild SemiconductorIn Stock: 3986MM74HCT08MX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HCT08ME4 is determined by the following criteria:

Electrical Compatibility Requirements:

• Logic type: AND Gate with 4 channels, 2 inputs per channel
• Supply voltage range: 4.5V ~ 5.5V (minimum requirement)
• Input/output logic levels: 0.8V low, 2V high
• Output current capability: 4mA minimum for both high and low states
• Propagation delay: 25ns or faster at specified conditions

Mechanical Compatibility Requirements:

• Mounting type: Surface Mount
• Package type: 14-SOIC or 14-SO (functionally equivalent pinout)
• Package dimensions: 0.154" width, 3.90mm width

Compliance Requirements:

• RoHS3 compliance preferred for new designs
• MSL rating: 1 (Unlimited) preferred

Substitutes are grouped by product status (Active vs. Obsolete) and by manufacturer to facilitate sourcing decisions.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement: CD74HCT08M96 (Texas Instruments) is the optimal substitute. It maintains identical electrical specifications, supply voltage range, and operating temperature range as the CD74HCT08ME4. Both parts are from the same manufacturer with ROHS3 compliance and MSL rating of 1 (Unlimited). Inventory availability is significantly higher (27,700 units).

Secondary Recommendations - Active Status: MC74HCT08ADR2G (onsemi) provides superior performance with faster propagation delay (17ns vs. 25ns), lower quiescent current (1 µA vs. 2 µA), and extended supply voltage range (2V ~ 6V). This part is suitable for applications requiring enhanced speed or lower power consumption. ROHS3 compliant with active product status.

74HCT08D/AUJ (Nexperia USA Inc.) offers near-identical specifications with slightly faster propagation delay (24ns) and extended output current capability on the low state (5.2mA). Operating temperature range is -40°C ~ 125°C. ROHS3 compliant and active.

74HCT08S14-13 (Diodes Incorporated) maintains full electrical compatibility with the original part. Note that quiescent current is elevated at 20 µA. ROHS3 compliant and active.

Avoid - Obsolete Status: MC74HCT08ADG (onsemi) and CD74HCT08M (Harris Corporation) are obsolete and should not be selected for new designs despite technical compatibility.

Temperature Range Consideration: MM74HCT08M and MM74HCT08MX (Fairchild Semiconductor) have reduced operating temperature range (-40°C ~ 85°C) compared to the original part (-55°C ~ 125°C). These are suitable only for applications within the narrower temperature specification.

Frequently Asked Questions (FAQ)

Q: Can I use MC74HCT08ADR2G as a direct replacement for CD74HCT08ME4? A: Yes. MC74HCT08ADR2G meets all electrical compatibility requirements with identical logic function, input/output levels, and output current capability. The extended supply voltage range (2V ~ 6V) and faster propagation delay (17ns) provide additional design margin. Both parts are ROHS3 compliant and in active production status.

Q: What is the difference between 14-SOIC and 14-SO packaging? A: Both package types are functionally equivalent with identical pinout and 0.154" (3.90mm) width. The designations reflect minor manufacturing variations between suppliers. Parts in either package are mechanically and electrically interchangeable for this logic IC.

Q: Why does 74HCT08S14-13 have higher quiescent current (20 µA vs. 2 µA)? A: This is a manufacturer specification difference for the Diodes Incorporated variant. The elevated quiescent current does not affect functional compatibility or logic operation. Selection depends on application power budget requirements.

Q: Is the CD74HCT08M from Harris Corporation suitable for new designs? A: No. This part is obsolete and RoHS non-compliant. Use CD74HCT08M96 (Texas Instruments) or other active alternatives for new designs.

Q: Which substitute has the fastest propagation delay? A: MC74HCT08ADR2G and MC74HCT08ADG both offer 17ns propagation delay at 5V, compared to 25ns for the original CD74HCT08ME4. This faster performance is available from onsemi variants.

Q: Can I use MM74HCT08M in a circuit requiring -55°C operation? A: No. MM74HCT08M has a minimum operating temperature of -40°C. For applications requiring -55°C operation, use CD74HCT08M96, MC74HCT08ADR2G, or MC74HCT08ADG.

Q: Are all substitutes ROHS3 compliant? A: No. CD74HCT08M (Harris Corporation) is RoHS non-compliant. MM74HCT08M and MM74HCT08MX do not specify RoHS status. For RoHS3 compliance, select from CD74HCT08M96, MC74HCT08ADR2G, 74HCT08D/AUJ, 74HCT08S14-13, or MC74HCT08ADG.