SN74ACT574NSR Equivalent & Substitute Parts

Part Overview

The SN74ACT574NSR is a D-type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit positive edge triggering capability. This component operates at a maximum clock frequency of 110 MHz with tri-state, non-inverted outputs, housed in a 20-SOIC surface mount package. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts become necessary when the primary part faces supply constraints, extended lead times, or when design requirements permit functional equivalents with enhanced performance characteristics or alternative packaging options.

Substiute Parts

SN74ACT574NSR

Texas InstrumentsIn Stock: 4218SN74ACT574NSR Datasheet

Current PartRFQ

MC74ACT374DWG

onsemiIn Stock: 2288MC74ACT374DWG Datasheet

MFR RecommendedRFQ

MC74ACT374DWR2G

onsemiIn Stock: 1886MC74ACT374DWR2G Datasheet

MFR RecommendedRFQ

MC74ACT377DWG

onsemiIn Stock: 794MC74ACT377DWG Datasheet

MFR RecommendedRFQ

MC74ACT377DWR2G

onsemiIn Stock: 2424MC74ACT377DWR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ACT574NSR is determined by the following critical parameters:

Functional Compatibility Requirements:

• Series: 74ACT logic family
• Type: D-Type flip-flop
• Number of Elements: 1
• Number of Bits per Element: 8
• Trigger Type: Positive Edge
• Output Type: Tri-State configuration with non-inverted outputs
• Voltage Supply Range: 4.5V ~ 5.5V
• Operating Temperature Range: -40°C ~ 85°C
• Mounting Type: Surface Mount

Performance Considerations:

• Clock Frequency: Substitute parts must meet or exceed 110 MHz minimum
• Max Propagation Delay: Substitute parts must meet or exceed 11 ns performance
• Output Current Capability: 24 mA minimum for both high and low states
• Quiescent Current: Must not exceed specified limits for the application

Compliance & Environmental:

• RoHS3 Compliance required
• REACH Unaffected status
• Moisture Sensitivity Level: MSL 1 or MSL 3 acceptable depending on assembly process capability

The substitute parts identified (MC74ACT374DWG, MC74ACT374DWR2G, MC74ACT377DWG, MC74ACT377DWR2G) meet these functional and electrical requirements while offering enhanced performance specifications or alternative packaging formats.

Parameter Comparison

Engineering Selection Recommendations

MC74ACT374DWG and MC74ACT374DWR2G (onsemi): Both parts are functionally equivalent to the SN74ACT574NSR with enhanced performance specifications. The MC74ACT374DWR2G is recommended for high-volume production requiring tape and reel packaging format. The MC74ACT374DWG is suitable for applications accepting tube packaging. Both parts feature improved clock frequency (160 MHz vs. 110 MHz) and reduced propagation delay (10 ns vs. 11 ns). Both maintain active product status and full RoHS3 compliance. The primary consideration is the increased quiescent current (8 µA vs. 4 µA) and MSL 3 moisture sensitivity rating, which requires controlled storage conditions during assembly.

MC74ACT377DWR2G (onsemi): This part maintains active product status and is suitable for applications where the non-inverted output configuration is acceptable. It offers improved clock frequency (140 MHz) and reduced propagation delay (10 ns). The MC74ACT377DWR2G is available in tape and reel packaging and maintains full RoHS3 compliance. Quiescent current and moisture sensitivity considerations are identical to the MC74ACT374 variants.

MC74ACT377DWG (onsemi): This part has reached obsolete product status and is not recommended for new designs or long-term production commitments despite current inventory availability.

Package Consideration: All substitute parts use a wider 20-SOIC package (0.295", 7.50mm Width) compared to the original SN74ACT574NSR (0.209", 5.30mm Width). PCB layout verification is required to confirm physical compatibility.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT374DWR2G directly replace SN74ACT574NSR in existing designs? A: Electrical and functional compatibility is confirmed. Physical package dimensions differ (0.295" vs. 0.209" width), requiring PCB layout verification. Moisture sensitivity level increases from MSL 1 to MSL 3, necessitating controlled storage and handling during assembly.

Q: What is the difference between MC74ACT374 and MC74ACT377 variants? A: Both are 8-bit D-type flip-flops with identical electrical specifications. The MC74ACT374 features tri-state, non-inverted outputs matching the original SN74ACT574NSR. The MC74ACT377 features non-inverted outputs without tri-state capability. Selection depends on output configuration requirements.

Q: Why do substitute parts have higher quiescent current (8 µA vs. 4 µA)? A: This parameter difference is provided in the manufacturer specifications. Applications with strict power consumption requirements should evaluate this increase against overall system power budgets.

Q: What does MSL 3 (168 Hours) moisture sensitivity mean? A: The component must be stored in controlled humidity conditions and used within 168 hours of package opening. This requires implementation of moisture control procedures during assembly, unlike the original part's unlimited moisture sensitivity rating.

Q: Are all substitute parts RoHS3 compliant? A: Yes, all identified substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original SN74ACT574NSR environmental certifications.

Q: Which substitute part offers the best performance improvement? A: MC74ACT374DWG and MC74ACT374DWR2G provide the highest clock frequency (160 MHz) and lowest propagation delay (10 ns), representing the maximum performance enhancement available among the substitute options.

Q: Is MC74ACT377DWG suitable for new production? A: No. This part has reached obsolete product status and should not be selected for new designs or long-term production commitments.