SN74F574DW Equivalent & Substitute Parts

Part Overview

The SN74F574DW is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit capacity and positive edge triggering. This component is classified as Last Time Buy, indicating discontinued production with limited availability. The SN74F574DW is housed in a 20-SOIC surface mount package and operates within the 4.5V to 5.5V supply voltage range with a maximum propagation delay of 8.5ns at 5V with 50pF load.

Due to Last Time Buy status, identifying equivalent substitute parts with identical electrical and mechanical specifications is essential for design continuity and procurement planning.

Substiute Parts

SN74F574DW

Texas InstrumentsIn Stock: 1301SN74F574DW Datasheet

Current PartRFQ

SN74F574DWR

Texas InstrumentsIn Stock: 4204SN74F574DWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74F574DW is determined by strict equivalence across the following critical parameters:

• Functional Type: D-Type flip-flop with identical element count (1) and bit capacity (8)
• Output Configuration: Tri-State, Non-Inverted output type
• Electrical Performance: Clock frequency of 100 MHz, propagation delay of 8.5ns @ 5V with 50pF load, and identical output current specifications (3mA high, 24mA low)
• Supply Voltage: 4.5V to 5.5V operating range
• Package Specification: 20-SOIC surface mount package with 0.295" (7.50mm) width
• Environmental Compliance: ROHS3 compliance and MSL Level 1 rating

The SN74F574DWR qualifies as a direct substitute based on identical electrical characteristics and package specifications. The primary distinction is packaging format: the SN74F574DW is supplied in Tube packaging, while the SN74F574DWR is supplied in Tape & Reel format. Both parts share the same base product number (74F574) and maintain full functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The SN74F574DWR is the manufacturer-recommended substitute for the SN74F574DW. Both parts maintain identical electrical specifications, functional characteristics, and package dimensions. The SN74F574DWR carries Active product status, ensuring continued availability and supply chain stability, whereas the SN74F574DW is designated Last Time Buy with limited inventory.

Selection between these parts should be based on procurement requirements and packaging format compatibility. The SN74F574DWR in Tape & Reel format is suitable for automated assembly processes, while the SN74F574DW in Tube packaging may be appropriate for manual assembly or lower-volume applications. Both parts satisfy ROHS3 compliance and REACH requirements with identical environmental ratings.

Frequently Asked Questions (FAQ)

Q: Can the SN74F574DWR directly replace the SN74F574DW in existing designs?

A: Yes. The SN74F574DWR is electrically and functionally identical to the SN74F574DW. Both parts feature the same 20-SOIC package dimensions, electrical performance specifications, and operating characteristics. The only difference is the packaging format (Tube versus Tape & Reel).

Q: What is the significance of the Last Time Buy status for the SN74F574DW?

A: Last Time Buy indicates that Texas Instruments has discontinued production of the SN74F574DW. Existing inventory is limited and will not be replenished. The SN74F574DWR, with Active status, represents the ongoing production equivalent and should be considered for new designs and long-term supply planning.

Q: Are there any compatibility concerns when switching from Tube to Tape & Reel packaging?

A: No compatibility concerns exist at the component level. The electrical and mechanical specifications are identical. Packaging format selection depends on assembly process requirements. Tape & Reel format is optimized for automated pick-and-place assembly, while Tube packaging is suitable for manual handling and lower-volume applications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN74F574DW and SN74F574DWR are ROHS3 compliant, REACH unaffected, and carry Moisture Sensitivity Level 1 (Unlimited) rating. Environmental and regulatory compliance is identical across both parts.

Q: What are the key parameters that define substitution eligibility for this part?

A: Substitution eligibility is determined by: D-Type flip-flop configuration with 1 element and 8-bit capacity, Tri-State non-inverted output type, 100 MHz clock frequency, 8.5ns propagation delay at 5V with 50pF load, 4.5V to 5.5V supply voltage range, 20-SOIC surface mount package, and identical output current specifications (3mA high, 24mA low).