SN74AHCT08D Equivalent & Substitute Parts

Part Overview

The SN74AHCT08D is a 4-channel AND gate logic IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This part is discontinued at DiGi Electronics but remains available through alternative sources with 5300 pieces in stock. The discontinuation status necessitates identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for new designs or production continuity.

Substiute Parts

SN74AHCT08D

Texas InstrumentsIn Stock: 5400SN74AHCT08D Datasheet

Current PartRFQ

SN74AHCT08DR

Texas InstrumentsIn Stock: 2425SN74AHCT08DR Datasheet

DirectRFQ

MC74VHCT08ADR2G

onsemiIn Stock: 9818MC74VHCT08ADR2G Datasheet

DirectRFQ

74AHCT08D,118

NXP SemiconductorsIn Stock: 25708074AHCT08D,118 Datasheet

UpgradeRFQ

74AHCT08D-Q100J

Nexperia USA Inc.In Stock: 113874AHCT08D-Q100J Datasheet

UpgradeRFQ

74VHCT08D,118

NXP USA Inc.In Stock: 1345374VHCT08D,118 Datasheet

UpgradeRFQ

74AHCT08S14-13

Diodes IncorporatedIn Stock: 5978574AHCT08S14-13 Datasheet

MFR RecommendedRFQ

74VHCT08D-Q100J

Nexperia USA Inc.In Stock: 121874VHCT08D-Q100J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74AHCT08D is determined by the following criteria:

Electrical Parameters (Must Match):

• Logic Type: AND Gate
• Number of Circuits: 4
• Number of Inputs: 2
• Voltage Supply Range: 4.5V ~ 5.5V
• Operating Temperature Range: -40°C ~ 125°C
• Input Logic Levels: Low 0.8V, High 2V
• Output Current: 8mA High, 8mA Low

Mechanical Parameters (Must Match):

• Package Type: 14-SOIC
• Mounting Type: Surface Mount
• Package Dimensions: 0.154" width, 3.90mm width

Compliance Parameters:

• RoHS3 Compliant
• Moisture Sensitivity Level 1

Substitute parts are grouped into three categories: Direct Manufacturer Substitutes (identical specifications and packaging), Upgrade Variants (enhanced features or automotive qualification), and Manufacturer Recommended Alternatives (optimized for specific applications).

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Preferred for Pin-Compatible Replacement):

SN74AHCT08DR and MC74VHCT08ADR2G are direct electrical and mechanical equivalents to the SN74AHCT08D. Both maintain identical electrical specifications, supply voltage range, propagation delay, and 14-SOIC packaging. SN74AHCT08DR is manufactured by Texas Instruments with active product status and 2400 pieces available. MC74VHCT08ADR2G is manufactured by onsemi with higher inventory availability (9718 pieces) and active status.

Upgrade Variants with Automotive Qualification:

74AHCT08D-Q100J and 74VHCT08D-Q100J are AEC-Q100 qualified variants suitable for automotive applications. These parts maintain identical electrical performance and 14-SOIC packaging while providing automotive-grade reliability certification. Both are active products with adequate inventory.

High-Volume Alternatives:

74AHCT08D,118 (NXP Semiconductors) and 74VHCT08D,118 (NXP USA Inc.) are bulk-packaged variants with significantly higher inventory availability (257016 and 13370 pieces respectively). These are suitable for high-volume production requirements.

Performance Trade-Off Alternative:

74AHCT08S14-13 (Diodes Incorporated) exhibits slightly higher quiescent current (20 µA versus 2 µA) and propagation delay (10ns versus 7.9ns) but maintains all other electrical parameters and 14-SOIC packaging. This part offers the highest inventory availability (59700 pieces) and is recommended only when performance margins permit the specified deviations.

Frequently Asked Questions (FAQ)

Q: Can SN74AHCT08DR be used as a direct replacement for SN74AHCT08D?

A: Yes. SN74AHCT08DR is electrically and mechanically identical to SN74AHCT08D. Both are 4-channel AND gates in 14-SOIC packages with identical voltage supply ranges (4.5V ~ 5.5V), propagation delays (7.9ns @ 5V, 50pF), and quiescent current specifications (2 µA maximum). The primary difference is packaging format (Cut Tape & Digi-Reel versus Tube) and product status (Active versus Discontinued).

Q: What is the difference between 74AHCT and 74VHCT series parts?

A: Both series are 4-channel AND gates in 14-SOIC packages with identical electrical specifications for this application. The series designation reflects different manufacturer implementations. All specified electrical parameters, voltage ranges, and operating temperatures are equivalent.

Q: Is 74AHCT08S14-13 suitable for applications requiring 7.9ns propagation delay?

A: No. The 74AHCT08S14-13 has a maximum propagation delay of 10ns at 5V with 50pF load, which exceeds the original SN74AHCT08D specification of 7.9ns. This part is suitable only for applications with timing margins that accommodate the 2.1ns additional delay.

Q: Are automotive-qualified variants (74AHCT08D-Q100J, 74VHCT08D-Q100J) compatible with standard industrial applications?

A: Yes. Automotive-qualified parts meet or exceed industrial specifications. AEC-Q100 qualification indicates enhanced reliability testing and is backward compatible with standard industrial requirements. These parts can be used in any application where the original SN74AHCT08D is specified.

Q: What packaging formats are available for these substitute parts?

A: Available packaging formats include Cut Tape & Digi-Reel (SN74AHCT08DR), Tape & Reel (MC74VHCT08ADR2G, 74AHCT08D-Q100J, 74VHCT08D-Q100J, 74AHCT08S14-13), and Bulk (74AHCT08D,118, 74VHCT08D,118). All maintain the same 14-SOIC component package dimensions.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All specified substitute parts maintain RoHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) ratings, consistent with the original SN74AHCT08D.