SN74ALS574BDW Equivalent & Substitute Parts

Part Overview

The SN74ALS574BDW is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, designed for 8-bit data storage and transfer applications. This component features a single element with 8-bit capacity, positive edge triggering, and tri-state non-inverted outputs. The device operates at a clock frequency of 35 MHz with a maximum propagation delay of 14 ns at 5V with 50 pF load.

The SN74ALS574BDW is currently in Last Time Buy status, indicating that Texas Instruments has discontinued or will discontinue production. This necessitates identification of equivalent substitute parts to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Substiute Parts

SN74ALS574BDW

Texas InstrumentsIn Stock: 3297SN74ALS574BDW Datasheet

Current PartRFQ

SN74ALS574BDWR

Texas InstrumentsIn Stock: 2174SN74ALS574BDWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ALS574BDW is determined by strict equivalence across the following critical parameters:

Functional Parameters: Type (D-Type flip-flop), number of elements (1), number of bits per element (8), output type (tri-state, non-inverted), and trigger type (positive edge) must remain identical.

Electrical Parameters: Clock frequency (35 MHz), maximum propagation delay (14 ns @ 5V, 50pF), voltage supply range (4.5V ~ 5.5V), output current specifications (2.6 mA high, 24 mA low), and quiescent current (18 mA) must be maintained.

Physical Parameters: Package type (20-SOIC with 0.295" / 7.50mm width) and mounting type (surface mount) must match.

Compliance Parameters: RoHS3 compliance and MSL rating (1) must be preserved.

The SN74ALS574BDWR meets all these criteria and is designated as the manufacturer-recommended substitute.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS574BDWR is the direct equivalent substitute for the SN74ALS574BDW. Both components are manufactured by Texas Instruments and share identical electrical, functional, and physical specifications. The primary distinction is product status: the SN74ALS574BDW is in Last Time Buy status, while the SN74ALS574BDWR maintains Active status, ensuring continued availability and supply chain stability.

Both parts maintain ROHS3 compliance and MSL rating 1, satisfying regulatory and environmental requirements. The packaging format differs (Tube versus Cut Tape & Digi-Reel®), which affects procurement and handling but does not impact electrical or mechanical compatibility.

For new designs and production runs, the SN74ALS574BDWR is the appropriate selection. For existing inventory management of the SN74ALS574BDW, transition planning to the SN74ALS574BDWR is recommended to avoid supply discontinuation.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS574BDWR be used as a direct replacement for the SN74ALS574BDW?

A: Yes. The SN74ALS574BDWR is electrically and mechanically identical to the SN74ALS574BDW. All functional parameters, electrical specifications, and package dimensions are equivalent. The only difference is product status and packaging format.

Q: What is the difference between Tube and Cut Tape & Digi-Reel® packaging?

A: Tube packaging supplies components in a plastic tube for manual handling and smaller quantities. Cut Tape & Digi-Reel® packaging provides components on continuous tape suitable for automated pick-and-place assembly equipment. Both formats contain the same component with identical specifications.

Q: Why is the SN74ALS574BDW in Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments has announced the end of production for this part number. Customers are advised to place final orders before the discontinuation date. The SN74ALS574BDWR remains in Active status and is the recommended long-term alternative.

Q: Are there any pin-to-pin or functional differences between these parts?

A: No. Both the SN74ALS574BDW and SN74ALS574BDWR are pin-to-pin compatible with identical pinout, functionality, and electrical characteristics. They can be used interchangeably in circuit designs without modification.

Q: What compliance certifications do these parts carry?

A: Both parts are ROHS3 compliant and carry Moisture Sensitivity Level (MSL) rating 1, indicating unlimited shelf life under normal storage conditions. Both are REACH Unaffected and classified under ECCN EAR99.