SN74HCT574NG4 Equivalent & Substitute Parts

Part Overview

The SN74HCT574NG4 is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit capacity and tri-state non-inverted output. This component operates as a standard logic device with positive edge triggering and is housed in a 20-DIP (0.300", 7.62mm) through-hole package.

The SN74HCT574NG4 has been discontinued at DiGi Electronics. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production, maintenance, and new builds.

Substiute Parts

SN74HCT574NG4

Texas InstrumentsIn Stock: 770SN74HCT574NG4 Datasheet

Current PartRFQ

SN74HCT574N

Texas InstrumentsIn Stock: 129063SN74HCT574N Datasheet

MFR RecommendedRFQ

SN74HCT374N

Texas InstrumentsIn Stock: 4456SN74HCT374N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HCT574NG4 is determined by the following critical parameters:

• Type and Function: D-Type flip-flop with 1 element, 8-bit configuration, and positive edge triggering
• Output Characteristics: Tri-state, non-inverted output
• Electrical Performance: Clock frequency of 40 MHz, propagation delay specifications, supply voltage range of 4.5V ~ 5.5V, and output current ratings
• Package Compatibility: 20-DIP (0.300", 7.62mm) through-hole mounting
• Compliance: ROHS3 compliance and REACH unaffected status

Substitute parts must match all these parameters to ensure functional and mechanical compatibility within existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

SN74HCT574N is the manufacturer-recommended substitute for the SN74HCT574NG4. Both parts share identical electrical specifications, package configuration, and compliance certifications. The SN74HCT574N maintains active product status and is available in higher inventory quantities (129,050 pcs), ensuring supply chain continuity. This part is the primary choice for direct replacement applications.

SN74HCT374N is a parametric equivalent that meets all functional and mechanical requirements. It features improved propagation delay performance (41ns versus 47ns at 5.5V, 150pF), maintaining compatibility with the original design while offering enhanced timing characteristics. This part is also in active production status with adequate inventory availability (4,400 pcs). Selection of this part is appropriate when timing margin improvements are beneficial to circuit performance.

Both substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can SN74HCT574N be used as a direct replacement for SN74HCT574NG4?

A: Yes. The SN74HCT574N is electrically and mechanically identical to the SN74HCT574NG4. Both parts feature the same D-Type flip-flop configuration, 8-bit capacity, tri-state output, 40 MHz clock frequency, supply voltage range, and 20-DIP package. The primary difference is product status: SN74HCT574N is active while SN74HCT574NG4 is discontinued.

Q: What is the difference between SN74HCT574N and SN74HCT374N?

A: Both parts are functionally equivalent D-Type flip-flops with identical package, voltage, and output specifications. The SN74HCT374N offers improved propagation delay performance at 41ns compared to 47ns for the SN74HCT574N, both measured at 5.5V with 150pF load. This performance difference does not affect functional compatibility but may provide timing margin benefits in speed-critical applications.

Q: Are the substitute parts available in the same packaging as the original?

A: Yes. All three parts—SN74HCT574NG4, SN74HCT574N, and SN74HCT374N—use the 20-DIP (0.300", 7.62mm) through-hole package. They are mechanically interchangeable and can be installed in existing PCB designs without modification.

Q: Do the substitute parts meet the same compliance requirements?

A: Yes. Both SN74HCT574N and SN74HCT374N are ROHS3 compliant and REACH unaffected, matching the compliance status of the original SN74HCT574NG4.

Q: Which substitute should I select for a new design?

A: For new designs, SN74HCT574N is the recommended choice due to its active product status, higher inventory availability, and identical specifications to the original part. SN74HCT374N is an alternative if improved propagation delay performance is required.