SN74ALS74ADRE4 Equivalent & Substitute Parts

Part Overview

The SN74ALS74ADRE4 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments, housed in a 14-SOIC surface mount package. This device provides two independent 1-bit D-type flip-flops with set and reset functionality, operating at a maximum clock frequency of 34 MHz with a propagation delay of 18ns at 5V with 50pF load.

The SN74ALS74ADRE4 is currently discontinued at DiGi Electronics, with 644 pieces available as new original stock. Due to its discontinued status, identifying equivalent substitute parts is necessary for ongoing design support, production continuity, and long-term component availability.

Substiute Parts

SN74ALS74ADRE4

Texas InstrumentsIn Stock: 705SN74ALS74ADRE4 Datasheet

Current PartRFQ

SN74ALS74ADR

Texas InstrumentsIn Stock: 3758SN74ALS74ADR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ALS74ADRE4 is determined by strict equivalence across the following critical parameters:

• Base Product Number: Must be 74ALS74 to ensure identical logic function and pin configuration
• Package Type: Must be 14-SOIC (0.154", 3.90mm Width) for mechanical and electrical compatibility
• Electrical Specifications: Clock frequency, propagation delay, voltage supply range, output current ratings, and quiescent current must match exactly
• Functional Architecture: Dual D-type flip-flops with complementary outputs, set/reset functionality, and positive edge triggering
• Compliance Standards: RoHS3 compliance and MSL rating must be maintained

The SN74ALS74ADR meets all substitution criteria as an active product variant with identical electrical and mechanical specifications, differing only in packaging format (Tape & Reel versus individual packaging).

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS74ADR is a direct functional and electrical equivalent to the SN74ALS74ADRE4. Both devices share identical logic specifications, electrical performance characteristics, and package geometry. The primary distinction is product status: the SN74ALS74ADRE4 is discontinued, while the SN74ALS74ADR maintains active production status with significantly higher inventory availability (3700 pieces versus 644 pieces).

Both parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with modern manufacturing and environmental standards. The SN74ALS74ADR is suitable for direct substitution in applications currently using the SN74ALS74ADRE4, with no circuit redesign or board layout modifications required.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS74ADR replace the SN74ALS74ADRE4 in existing designs?

A: Yes. The SN74ALS74ADR is electrically and functionally identical to the SN74ALS74ADRE4. Both devices have the same pin configuration, electrical specifications, and 14-SOIC package dimensions. No circuit modifications are necessary.

Q: What is the difference between SN74ALS74ADRE4 and SN74ALS74ADR?

A: The primary difference is packaging format. The SN74ALS74ADRE4 is supplied in individual packaging, while the SN74ALS74ADR is supplied in Tape & Reel format. Electrically and functionally, they are identical.

Q: Why is the SN74ALS74ADRE4 discontinued?

A: The SN74ALS74ADRE4 is discontinued at DiGi Electronics. The SN74ALS74ADR remains in active production as the current standard offering from Texas Instruments for this logic function.

Q: Are there any compatibility concerns when switching from SN74ALS74ADRE4 to SN74ALS74ADR?

A: No compatibility concerns exist. Both parts are pin-for-pin compatible, operate within identical voltage and temperature ranges, and deliver the same electrical performance. Board layout and circuit design remain unchanged.

Q: What is the significance of the 14-SOIC package specification?

A: The 14-SOIC (Small Outline Integrated Circuit) package with 0.154" width and 3.90mm body width is the standard surface mount package for this logic device. Both the SN74ALS74ADRE4 and SN74ALS74ADR use this identical package, ensuring mechanical compatibility with existing PCB designs.

Q: Do both parts meet current environmental and compliance standards?

A: Yes. Both the SN74ALS74ADRE4 and SN74ALS74ADR are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, meeting current manufacturing and environmental requirements.