74HCT08DB,118 Equivalent & Substitute Parts

Part Overview

The 74HCT08DB,118 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 and substitute parts necessary for ongoing design support and procurement continuity. The 74HCT08 series provides standard AND gate functionality across multiple manufacturers and package configurations, enabling direct functional replacement in applications requiring 4-channel 2-input AND logic operations.

Substiute Parts

74HCT08DB,118

Nexperia USA Inc.In Stock: 82774HCT08DB,118 Datasheet

Current PartRFQ

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 of the 74HCT08DB,118 is determined by the following critical parameters:

• Logic Function: All substitutes must implement 4-channel 2-input AND gate logic
• Voltage Supply: All parts operate within 4.5V ~ 5.5V range
• Input/Output Electrical Characteristics: Logic levels and output current ratings must match or exceed the original specification
• Package Compatibility: Substitutes are grouped by package type (14-SSOP vs. 14-TSSOP), which affects PCB layout and footprint compatibility
• Operating Temperature: Extended temperature range (-40°C ~ 125°C) is available only in the original part; active substitutes operate to -40°C ~ 85°C
• Compliance: All substitutes maintain ROHS3 compliance and MSL 1 rating

Substitutes are organized into two package families: 14-SSOP (same as original) and 14-TSSOP (narrower pitch alternative). Within each family, substitutes differ by manufacturer and product status.

Parameter Comparison

Engineering Selection Recommendations

For Direct Package Replacement (14-SSOP): SN74HCT08DBR (Texas Instruments) is the primary active substitute. It maintains identical package geometry, electrical characteristics, and ROHS3 compliance. Operating temperature is reduced to -40°C ~ 85°C compared to the original -40°C ~ 125°C specification.

For Package-Compatible Alternative (14-TSSOP): 74HCT08PW,118 (Nexperia USA Inc.) provides the same manufacturer continuity with active product status. The 14-TSSOP package is narrower (4.40mm vs. 5.30mm width) and requires PCB footprint verification before implementation.

For Multi-Source Strategy: SN74HCT08PWR (Texas Instruments, 14-TSSOP) offers active product status with established supply chain availability. This part is suitable for new designs requiring long-term procurement security.

For Performance-Enhanced Applications: MM74HCT08MTCX (Fairchild Semiconductor) provides faster propagation delay (18ns vs. 24ns) and higher output current capability (4.8mA vs. 4mA). Operating temperature range is -40°C ~ 85°C. Verify ROHS compliance requirements before selection.

Parts listed as "Discontinued at DiGi Electronics" (SN74HCT08PW, SN74HCT08PWT) remain functionally equivalent but may have limited procurement availability through standard distribution channels.

Frequently Asked Questions (FAQ)

Q: Can I use a 14-TSSOP package substitute in place of the 14-SSOP original? A: No direct PCB substitution is possible without footprint redesign. The 14-TSSOP package has a narrower pitch (0.173" width, 4.40mm) compared to 14-SSOP (0.209" width, 5.30mm). Schematic functionality is identical, but physical layout compatibility must be verified.

Q: What is the difference between the Nexperia and Texas Instruments versions? A: Both manufacturers provide equivalent AND gate logic with identical input/output electrical specifications. Nexperia 74HCT08PW,118 maintains the extended operating temperature range (-40°C ~ 125°C). Texas Instruments SN74HCT08 variants operate to -40°C ~ 85°C. All maintain ROHS3 compliance and MSL 1 rating.

Q: Is the Fairchild MM74HCT08MTCX a direct replacement? A: Functionally, yes. The MM74HCT08MTCX provides faster propagation delay (18ns) and higher output current (4.8mA). However, operating temperature is limited to -40°C ~ 85°C, and ROHS compliance status is not specified in available documentation. Verify compliance requirements for your application.

Q: Why is the original 74HCT08DB,118 marked as obsolete? A: Obsolete status indicates the part is no longer manufactured by Nexperia USA Inc. Active substitutes from the same manufacturer (74HCT08PW,118) or alternative manufacturers (Texas Instruments, Fairchild) provide equivalent functionality and are recommended for new designs and ongoing procurement.

Q: Are all substitutes ROHS3 compliant? A: ROHS3 compliance is confirmed for Nexperia and Texas Instruments variants. Fairchild MM74HCT08MTCX compliance status is not specified in the provided data. Verify compliance documentation directly with the supplier if ROHS certification is required.

Q: What is the significance of the propagation delay differences? A: Propagation delay ranges from 18ns (Fairchild) to 24ns (Nexperia original). In most standard logic applications, this difference is negligible. For timing-critical circuits operating at high frequencies, the faster Fairchild variant may provide marginal performance benefits, but system-level timing analysis is required to confirm necessity.