74HCT08D,652 Equivalent & Substitute Parts

Part Overview

The 74HCT08D,652 is a 4-channel 2-input AND gate logic IC manufactured by Nexperia USA Inc. in a 14-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The 74HCT08 series provides standard TTL-compatible AND gate functionality suitable for digital logic applications requiring 4.5V to 5.5V supply voltage operation.

Substiute Parts

74HCT08D,652

Nexperia USA Inc.In Stock: 245674HCT08D,652 Datasheet

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74HCT08D,653

Nexperia USA Inc.In Stock: 221574HCT08D,653 Datasheet

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CD74HCT08M

Harris CorporationIn Stock: 1565CD74HCT08M Datasheet

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CD74HCT08M96

Texas InstrumentsIn Stock: 27724CD74HCT08M96 Datasheet

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CD74HCT08ME4

Texas InstrumentsIn Stock: 854CD74HCT08ME4 Datasheet

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MC74HCT08ADG

onsemiIn Stock: 1096MC74HCT08ADG Datasheet

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MC74HCT08ADR2G

onsemiIn Stock: 1455MC74HCT08ADR2G Datasheet

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MM74HCT08M

Fairchild SemiconductorIn Stock: 1559MM74HCT08M Datasheet

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MM74HCT08MX

Fairchild SemiconductorIn Stock: 3986MM74HCT08MX Datasheet

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SN74HCT08D

Texas InstrumentsIn Stock: 2080SN74HCT08D Datasheet

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SN74HCT08DR

Texas InstrumentsIn Stock: 3773SN74HCT08DR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HCT08D,652 is determined by the following critical parameters:

• Logic Type: AND Gate (4-channel, 2-input configuration)
• Package / Case: 14-SOIC form factor with 0.154" width and 3.90mm width dimensions
• Voltage - Supply: 4.5V ~ 5.5V nominal operating range
• Current - Output High, Low: 4mA drive capability
• Input Logic Levels: 0.8V low threshold, 2V high threshold
• Operating Temperature: Minimum -40°C to maximum 125°C
• Mounting Type: Surface Mount

Substitute parts must maintain electrical compatibility across these parameters. Parts with identical or superior specifications in propagation delay, quiescent current, and temperature range are functionally interchangeable. Packaging must be 14-SOIC to ensure PCB footprint compatibility.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the obsolete 74HCT08D,652, the 74HCT08D,653 from Nexperia USA Inc. is the primary equivalent. Both parts share identical electrical specifications and packaging, with the 653 variant currently in active production status.

For applications requiring active product status with extended temperature range (-55°C to 125°C), the CD74HCT08M96 from Texas Instruments or MC74HCT08ADR2G from onsemi are suitable alternatives. Both maintain ROHS3 compliance and 14-SOIC packaging compatibility.

The MC74HCT08ADR2G offers superior propagation delay performance (17ns) and lower quiescent current (1 µA) compared to the original part, with an expanded supply voltage range of 2V to 6V. This part is currently in active production.

The SN74HCT08DR from Texas Instruments provides an active alternative with standard 4.5V to 5.5V supply voltage operation and ROHS3 compliance, though with a reduced operating temperature maximum of 85°C.

Parts with RoHS non-compliance status (CD74HCT08M) should be avoided for new designs requiring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the 74HCT08D,652 be directly replaced with 74HCT08D,653?

A: Yes. Both parts are manufactured by Nexperia USA Inc. and share identical electrical specifications, package dimensions, and pin configurations. The 653 variant is the active production equivalent of the obsolete 652 variant.

Q: What is the difference between the onsemi MC74HCT08ADG and MC74HCT08ADR2G?

A: Both parts have identical electrical specifications. The primary difference is packaging format: MC74HCT08ADG uses standard packaging, while MC74HCT08ADR2G uses Tape & Reel (TR) format. The MC74HCT08ADR2G is currently in active production status.

Q: Are the Fairchild MM74HCT08M and MM74HCT08MX interchangeable with the original part?

A: Both Fairchild parts maintain electrical compatibility within the 14-SOIC package. However, the maximum operating temperature is limited to 85°C compared to the original part's 125°C. Output current capability is slightly higher at 4.8mA. These parts are suitable for applications not requiring the extended temperature range.

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

A: The onsemi part is designed with broader voltage tolerance specifications. It remains compatible with standard 4.5V to 5.5V applications while offering flexibility for systems operating at different voltage levels. The part maintains all other electrical parameters within specification.

Q: What packaging formats are available for 74HCT08 AND gate ICs?

A: All substitute parts listed use the 14-SOIC (0.154", 3.90mm Width) surface mount package. Packaging format variations (Cut Tape, Digi-Reel, Tape & Reel, Tube) affect procurement and handling but do not change electrical or mechanical compatibility on the PCB.

Q: Is RoHS3 compliance required for substitute part selection?

A: RoHS3 compliance is specified for most active and recently discontinued parts. The CD74HCT08M from Harris Corporation is RoHS non-compliant and should not be selected for new designs requiring regulatory compliance. All other listed alternatives maintain ROHS3 compliance status.

Q: What is the significance of propagation delay differences between substitute parts?

A: Propagation delay ranges from 17ns to 25ns across the substitute parts. The original 74HCT08D,652 specifies 24ns at 4.5V with 50pF load. Parts with lower propagation delay (17ns to 22ns) provide faster logic switching and are suitable for higher-speed applications. Parts with 25ns delay remain within acceptable tolerance for standard TTL-compatible logic circuits.