74HCT08DB,112 Equivalent & Substitute Parts

Part Overview

The 74HCT08DB,112 is a 4-channel AND gate logic IC manufactured by Nexperia USA Inc. in a 14-SSOP surface mount package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74HCT08 series provides standard AND gate functionality across multiple package and manufacturer options, all sharing the same base logic architecture and electrical characteristics.

Substiute Parts

74HCT08DB,112

Nexperia USA Inc.In Stock: 76574HCT08DB,112 Datasheet

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74HCT08PW,118

Nexperia USA Inc.In Stock: 824374HCT08PW,118 Datasheet

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MM74HCT08MTCX

Fairchild SemiconductorIn Stock: 4840MM74HCT08MTCX Datasheet

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SN74HCT08DBR

Texas InstrumentsIn Stock: 2829SN74HCT08DBR Datasheet

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SN74HCT08PW

Texas InstrumentsIn Stock: 2088SN74HCT08PW Datasheet

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SN74HCT08PWR

Texas InstrumentsIn Stock: 3116SN74HCT08PWR Datasheet

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SN74HCT08PWT

Texas InstrumentsIn Stock: 3199SN74HCT08PWT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HCT08DB,112 is determined by the following criteria:

Functional Equivalence: All substitute parts maintain identical logic function (4-channel AND gate with 2 inputs per channel), circuit count, and input configuration.

Electrical Compatibility: Supply voltage range (4.5V ~ 5.5V), input logic levels (Low: 0.8V, High: 2V), and quiescent current (2 µA max) are consistent across all qualified substitutes.

Package Compatibility: Substitutes are grouped by package type—14-SSOP and 14-TSSOP variants. The 14-SSOP package (0.209" width) is directly interchangeable with other 14-SSOP parts. The 14-TSSOP package (0.173" width) represents a narrower footprint variant suitable for space-constrained layouts.

Propagation Delay Tolerance: Substitutes exhibit propagation delays ranging from 18ns to 24ns at specified voltage and load conditions, all within acceptable logic timing parameters for standard applications.

Manufacturer Availability: Active product status and current inventory levels distinguish parts suitable for immediate procurement from discontinued or obsolete variants.

Parameter Comparison

Engineering Selection Recommendations

For 14-SSOP Package Requirement: The SN74HCT08DBR (Texas Instruments) is the primary active substitute for the obsolete 74HCT08DB,112. Both parts share identical 14-SSOP packaging, electrical specifications, and RoHS3 compliance. The SN74HCT08DBR maintains full functional and pin compatibility with adequate inventory availability.

For 14-TSSOP Package Requirement: The 74HCT08PW,118 (Nexperia USA Inc.) and SN74HCT08PWR (Texas Instruments) are active alternatives in the narrower 14-TSSOP package. Both maintain identical electrical characteristics and compliance certifications. The 74HCT08PW,118 offers the highest current inventory level.

For Extended Temperature Range: The 74HCT08DB,112 and 74HCT08PW,118 (both Nexperia) support -40°C ~ 125°C operation. Substitute parts from Texas Instruments and Fairchild are rated to -40°C ~ 85°C. Select Nexperia variants if extended upper temperature operation is required.

For Improved Propagation Delay Performance: The MM74HCT08MTCX (Fairchild Semiconductor) exhibits 18ns propagation delay, faster than the original 24ns specification. This part is suitable for timing-critical applications but operates to -40°C ~ 85°C only.

Compliance Consideration: All recommended active substitutes maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can I use a 14-TSSOP package part as a direct replacement for the 14-SSOP 74HCT08DB,112?

A: No. While electrically equivalent, the 14-TSSOP and 14-SSOP packages have different physical dimensions and PCB footprints. The 14-TSSOP is narrower (0.173" vs 0.209" width) and requires a different land pattern. Select the package type matching your PCB design.

Q: What is the difference between the Nexperia and Texas Instruments versions?

A: Both manufacturers produce functionally identical 74HCT08 logic gates meeting the same electrical specifications. Primary differences are propagation delay (Nexperia: 24ns @ 4.5V; Texas Instruments: 22ns @ 5.5V) and maximum operating temperature (Nexperia: 125°C; Texas Instruments: 85°C). Select based on your thermal and timing requirements.

Q: Is the MM74HCT08MTCX a suitable substitute if I need faster propagation delay?

A: The MM74HCT08MTCX offers 18ns propagation delay, meeting faster timing requirements. However, it operates only to -40°C ~ 85°C maximum, compared to 125°C for Nexperia parts. Confirm your application's temperature range before selection.

Q: Why are some parts listed as "Discontinued at DiGi Electronics"?

A: Parts marked discontinued at DiGi Electronics are no longer actively stocked by that distributor but may remain available through other channels. For new designs, select parts with "Active" status to ensure long-term supply availability.

Q: Are all substitute parts RoHS3 compliant?

A: All recommended active substitutes carry RoHS3 compliance certification, meeting environmental and regulatory requirements for standard applications.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the lowest moisture sensitivity level, requiring no special moisture control during storage or handling. These parts can be stored and handled under standard conditions without desiccant packaging or baking requirements.