SN74ACT534DW Equivalent & Substitute Parts

Part Overview

The SN74ACT534DW is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, configured as a single element 8-bit positive edge-triggered device in a 20-SOIC surface mount package. This part is classified as Last Time Buy, indicating limited availability and the necessity to identify functionally equivalent alternatives for ongoing design requirements and production continuity.

Substitute parts are required due to product status transition and inventory constraints. Alternative devices must maintain electrical compatibility across supply voltage, propagation delay, output drive capability, and thermal operating range while accommodating packaging and output configuration variations.

Substiute Parts

SN74ACT534DW

Texas InstrumentsIn Stock: 1758SN74ACT534DW Datasheet

Current PartRFQ

SN74ACT534DWR

Texas InstrumentsIn Stock: 2690SN74ACT534DWR Datasheet

MFR RecommendedRFQ

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

MC74ACT574DWG

onsemiIn Stock: 2128MC74ACT574DWG Datasheet

MFR RecommendedRFQ

MC74ACT574DWR2G

onsemiIn Stock: 2111MC74ACT574DWR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the SN74ACT534DW is based on the following critical parameters that must remain compatible:

Mandatory Compatibility Parameters:

• Package / Case: 20-SOIC (0.295", 7.50mm Width) — all substitutes must use identical package
• Mounting Type: Surface Mount
• Number of Elements: 1
• Number of Bits per Element: 8
• Trigger Type: Positive Edge
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C
• Current - Output High/Low: 24 mA / 24 mA

Allowable Variations:

• Clock Frequency: May exceed 100 MHz (higher performance acceptable)
• Max Propagation Delay: May be lower than 11.5 ns (faster acceptable)
• Output Type: Tri-State with Inverted or Non-Inverted configuration
• Current - Quiescent (Iq): May vary (4 µA to 8 µA range acceptable)
• Moisture Sensitivity Level (MSL): May vary (MSL 1 to MSL 3 acceptable)
• Packaging Format: Tube or Tape & Reel (TR) both acceptable

Substitute parts are grouped by output configuration (Inverted vs. Non-Inverted) and product status (Active vs. Last Time Buy / Obsolete).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Recommended for Direct Replacement):

SN74ACT534DWR — Texas Instruments, Tape & Reel packaging. This part maintains identical electrical specifications to the main part (SN74ACT534DW) with Tri-State Inverted output configuration. Product status is Active, ensuring long-term availability. Packaging format difference (Tape & Reel vs. Tube) does not affect electrical compatibility. MSL rating of 1 (Unlimited) matches the original part.

Secondary Substitutes (Output Configuration Compatibility Required):

MC74ACT574DWG and MC74ACT574DWR2G — onsemi, Tri-State Non-Inverted output. These parts provide equivalent electrical performance with improved propagation delay (11 ns vs. 11.5 ns) and higher clock frequency capability (100 MHz). Output inversion must be accommodated in circuit design. Both parts are Active status. MSL rating is 3 (168 Hours), requiring appropriate moisture control during storage and assembly.

MC74ACT374DWG and MC74ACT374DWR2G — onsemi, Tri-State Non-Inverted output. These parts offer superior performance with 160 MHz clock frequency and 10 ns propagation delay. Output inversion must be accommodated in circuit design. Both parts are Active status. MSL rating is 3 (168 Hours).

Not Recommended:

MC74ACT377DWG — onsemi, Non-Inverted output (not Tri-State). Product status is Obsolete. This part lacks tri-state output capability required by the original design.

MC74ACT377DWR2G — onsemi, Non-Inverted output (not Tri-State). While product status is Active, this part lacks tri-state output capability required by the original design.

Frequently Asked Questions (FAQ)

Q: Can I use MC74ACT574DWG as a direct replacement for SN74ACT534DW?

A: Electrical substitution is possible with circuit design modification. Both parts share identical package (20-SOIC), supply voltage (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), output drive capability (24 mA), and positive edge trigger. The MC74ACT574DWG provides superior performance with 11 ns propagation delay versus 11.5 ns. However, the output configuration differs: SN74ACT534DW provides Tri-State Inverted output, while MC74ACT574DWG provides Tri-State Non-Inverted output. Circuit logic must accommodate this inversion difference.

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

A: Tube and Tape & Reel are packaging formats for delivery and handling. Tube packaging contains loose components in a plastic tube, suitable for lower-volume applications. Tape & Reel packaging places components on a continuous tape wound on a reel, optimized for automated assembly equipment. Both formats contain identical die and electrical specifications. Selection depends on assembly process requirements and volume.

Q: Why do some substitute parts have higher quiescent current (8 µA vs. 4 µA)?

A: Quiescent current variation is a manufacturing characteristic difference between Texas Instruments and onsemi implementations of the 74ACT logic family. The 8 µA specification for onsemi parts remains within acceptable limits for most applications and does not affect functional compatibility. Power consumption impact is negligible in typical digital logic circuits.

Q: What does MSL 3 (168 Hours) mean compared to MSL 1 (Unlimited)?

A: Moisture Sensitivity Level (MSL) defines the maximum time a component can be exposed to ambient moisture before assembly. MSL 1 (Unlimited) allows indefinite storage without moisture control. MSL 3 (168 Hours) requires assembly within 168 hours of package opening in standard humidity conditions, or the component must be baked to remove absorbed moisture. Production planning must account for this constraint when using onsemi substitutes.

Q: Can I use MC74ACT377DWR2G as a substitute?

A: MC74ACT377DWR2G is not suitable as a substitute. While it shares the same package, supply voltage, and operating temperature range, it lacks tri-state output capability. The original SN74ACT534DW provides Tri-State Inverted output, enabling multiple devices to share a common bus. MC74ACT377DWR2G provides only Non-Inverted output without tri-state control, making it incompatible with bus-based circuit architectures.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (SN74ACT534DWR, MC74ACT374DWG, MC74ACT374DWR2G, MC74ACT377DWG, MC74ACT377DWR2G, MC74ACT574DWG, MC74ACT574DWR2G) are ROHS3 Compliant. Environmental compliance is maintained across all substitution options.