SN74ALS08D Equivalent & Substitute Parts

Part Overview

The SN74ALS08D is a 4-channel AND gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This component is classified as Last Time Buy, indicating discontinued production with limited availability. The SN74ALS08D operates within the 74ALS logic family and provides fundamental AND gate functionality for digital logic applications. Identifying equivalent substitute parts is necessary due to the Last Time Buy status and finite inventory levels, ensuring design continuity and long-term supply chain reliability.

Substiute Parts

SN74ALS08D

Texas InstrumentsIn Stock: 3873SN74ALS08D Datasheet

Current PartRFQ

SN74ALS08DR

Texas InstrumentsIn Stock: 4134SN74ALS08DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ALS08D is determined by strict equivalence across the following critical parameters:

• Logic Type: AND Gate with identical 4-channel, 2-input configuration
• Electrical Specifications: Matching supply voltage range (4.5V ~ 5.5V), output current ratings (400µA, 8mA), input logic levels (0.8V low, 2V high), and propagation delay (14ns @ 5V, 50pF)
• Package Compatibility: Identical 14-SOIC surface mount package with 0.154" width (3.90mm)
• Compliance Standards: ROHS3 compliance, MSL Level 1, and matching REACH/ECCN classifications
• Series Alignment: Membership in the 74ALS logic family

The SN74ALS08DR qualifies as a direct manufacturer-recommended substitute, maintaining full electrical and mechanical compatibility while offering Active product status and improved inventory availability.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS08DR is the designated manufacturer-recommended substitute for the SN74ALS08D. Both parts maintain identical electrical and mechanical specifications, ensuring direct functional equivalence in circuit applications. The primary distinction is product status: the SN74ALS08D is Last Time Buy with finite inventory (3800 Pcs), while the SN74ALS08DR maintains Active status with higher availability (4037 Pcs). Both parts satisfy ROHS3 compliance and carry equivalent environmental certifications (REACH Unaffected, ECCN EAR99). The SN74ALS08DR is available in Cut Tape and Digi-Reel packaging formats, offering flexibility for different procurement and assembly workflows. Selection between these parts should prioritize the SN74ALS08DR for new designs and long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS08DR be used as a direct replacement for the SN74ALS08D in existing designs?

A: Yes. The SN74ALS08DR is electrically and mechanically identical to the SN74ALS08D. Both parts share the same logic function (4-channel AND gate), electrical specifications (supply voltage, output current, propagation delay), and 14-SOIC package dimensions. No circuit modifications are required.

Q: What is the difference between Tube and Cut Tape packaging?

A: Tube packaging (SN74ALS08D) is used for lower-volume orders and manual assembly processes. Cut Tape and Digi-Reel packaging (SN74ALS08DR) is optimized for automated pick-and-place assembly and higher-volume production. Both packaging formats contain identical components with the same electrical performance.

Q: Why is the SN74ALS08D classified as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part number. Existing inventory is available for purchase, but no future production runs are planned. The SN74ALS08DR, with Active status, represents the ongoing production alternative.

Q: Are there any compliance or certification differences between these parts?

A: No. Both the SN74ALS08D and SN74ALS08DR carry identical compliance certifications: ROHS3 Compliant, MSL Level 1 (Unlimited), REACH Unaffected, and ECCN EAR99 classification.

Q: What is the significance of MSL Level 1?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life with no special moisture control requirements during storage or handling. Both parts can be stored under standard conditions without desiccant packaging or time-limited exposure windows.