SN74ALS874BDW Equivalent & Substitute Parts

Part Overview

The SN74ALS874BDW is a dual 4-bit D-type flip-flop logic integrated circuit manufactured by Texas Instruments. This component functions as a master reset flip-flop with tri-state, non-inverted outputs, operating at a clock frequency of 30 MHz. The device is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure continued availability for new designs, maintenance applications, and production continuity.

Substiute Parts

SN74ALS874BDW

Texas InstrumentsIn Stock: 4365SN74ALS874BDW Datasheet

Current PartRFQ

SN74ALS874BDWR

Texas InstrumentsIn Stock: 3878SN74ALS874BDWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ALS874BDW is determined by strict equivalence across the following critical parameters:

• Functional Architecture: Dual 4-bit D-type flip-flop with master reset capability
• Output Configuration: Tri-state, non-inverted outputs
• Electrical Performance: 30 MHz clock frequency, 14 ns maximum propagation delay at 5V with 50 pF load
• Electrical Characteristics: 4.5V to 5.5V supply voltage, 2.6 mA output high current, 24 mA output low current, 21 mA quiescent current
• Package Specification: 24-SOIC (0.295", 7.50mm Width) surface mount package
• Environmental Compliance: ROHS3 compliant, REACH unaffected, MSL Level 1

The substitute part SN74ALS874BDWR maintains identical electrical specifications and functional characteristics. The primary distinction is packaging format: the original part is supplied in Tube packaging, while the substitute is supplied in Tape & Reel (TR) format. Both parts are manufactured by Texas Instruments within the 74ALS series.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS874BDWR is the direct substitute for the SN74ALS874BDW. Both parts are manufactured by Texas Instruments and maintain identical electrical specifications, functional characteristics, and environmental compliance certifications. The SN74ALS874BDWR is currently in Active product status, ensuring continued availability and supply chain reliability compared to the Last Time Buy status of the original part.

Selection between these parts is determined by packaging requirements. The SN74ALS874BDW is supplied in Tube packaging, suitable for lower-volume applications and manual assembly processes. The SN74ALS874BDWR is supplied in Tape & Reel (TR) format, optimized for automated pick-and-place assembly and high-volume production environments. Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS874BDWR be used as a direct replacement for the SN74ALS874BDW?

A: Yes. Both parts are electrically and functionally identical. The only difference is packaging format: Tube versus Tape & Reel (TR). The substitute part maintains all electrical specifications, including clock frequency, propagation delay, output characteristics, and supply voltage requirements.

Q: What is the difference between Tube and Tape & Reel (TR) packaging?

A: Tube packaging supplies individual components in a plastic tube, suitable for manual handling and lower-volume applications. Tape & Reel (TR) packaging supplies components on a continuous reel of tape, optimized for automated assembly equipment and high-volume production. Both formats contain the same component with identical specifications.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both the SN74ALS874BDW and SN74ALS874BDWR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: Why is the original part listed as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of the SN74ALS874BDW in Tube packaging. The SN74ALS874BDWR in Tape & Reel (TR) format remains in Active production status, ensuring continued component availability.

Q: Are the pin configurations identical between both parts?

A: Yes. Both parts use the 24-SOIC (0.295", 7.50mm Width) surface mount package with identical pin configurations, allowing direct substitution on printed circuit boards without layout modifications.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by: dual 4-bit D-type flip-flop architecture, tri-state non-inverted outputs, 30 MHz clock frequency, 14 ns maximum propagation delay at 5V with 50 pF load, 4.5V to 5.5V supply voltage, and 24-SOIC surface mount package. Both parts meet these specifications identically.