74F174SJ Equivalent & Substitute Parts

Part Overview

The 74F174SJ is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 6 bits per element and positive edge triggering. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74F174 series provides master reset functionality with non-inverted outputs suitable for digital logic applications requiring synchronous data storage and transfer.

Substiute Parts

74F174SJ

onsemiIn Stock: 83474F174SJ Datasheet

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SN74F174AD

Texas InstrumentsIn Stock: 2090SN74F174AD Datasheet

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SN74F174ADR

Texas InstrumentsIn Stock: 4312SN74F174ADR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F174SJ are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Parameters (Must Match):

• Type: D-Type Flip-Flop
• Number of Elements: 1
• Number of Bits per Element: 6
• Trigger Type: Positive Edge
• Output Type: Non-Inverted
• Voltage Supply Range: 4.5V ~ 5.5V
• Current Output Specifications: 1 mA (High), 20 mA (Low)
• Current - Quiescent (Iq): 45 mA
• Operating Temperature: 0°C ~ 70°C
• Max Propagation Delay @ 5V, 50pF: 10 ns

Mechanical Parameters (Must Match):

• Mounting Type: Surface Mount
• Package / Case: 16-SOIC
• Function: Master Reset

The substitute parts SN74F174AD and SN74F174ADR, both manufactured by Texas Instruments, meet all critical electrical and mechanical parameters. Both parts maintain the same base product number (74F174) and are functionally equivalent to the 74F174SJ, differing only in packaging format (Tube vs. Tape & Reel) and product status.

Parameter Comparison

Engineering Selection Recommendations

SN74F174ADR (Texas Instruments) - Recommended Primary Substitute

The SN74F174ADR is the preferred substitute for the 74F174SJ. This part carries Active product status, ensuring long-term availability and continued manufacturer support. It meets all electrical and mechanical compatibility requirements and is ROHS3 compliant. The Tape & Reel packaging format supports automated assembly processes. The higher clock frequency specification (140 MHz vs. 80 MHz) provides additional performance margin without affecting backward compatibility.

SN74F174AD (Texas Instruments) - Secondary Substitute

The SN74F174AD provides equivalent electrical functionality and meets all substitution criteria. This part is classified as Last Time Buy, indicating limited future availability. It is ROHS3 compliant and suitable for applications where Tube packaging is acceptable. Selection of this part should account for its transitional product status.

Both Texas Instruments substitutes maintain REACH Unaffected and EAR99 export classification status consistent with the original 74F174SJ.

Frequently Asked Questions (FAQ)

Q: Can SN74F174AD and SN74F174ADR be used interchangeably with 74F174SJ?

A: Yes. Both parts are electrically and mechanically equivalent. They differ only in packaging format (Tube vs. Tape & Reel) and product status. Selection depends on assembly requirements and supply chain considerations.

Q: What is the significance of the different package widths (0.209" vs. 0.154")?

A: Both parts use 16-SOIC packaging, but the onsemi 74F174SJ has a wider body (5.30mm) compared to the Texas Instruments substitutes (3.90mm). This dimensional difference may affect PCB layout and component placement. Verify PCB footprint compatibility before design implementation.

Q: Why is the clock frequency higher in the Texas Instruments parts?

A: The SN74F174AD and SN74F174ADR specify 140 MHz clock frequency compared to 80 MHz for the 74F174SJ. This represents improved performance specifications from Texas Instruments. The higher frequency does not affect backward compatibility and provides additional operational margin.

Q: Are there compliance or regulatory differences between these parts?

A: The Texas Instruments substitutes (SN74F174AD and SN74F174ADR) are ROHS3 compliant, while the onsemi 74F174SJ does not specify RoHS status. All three parts are REACH Unaffected and classified as EAR99 for export purposes.

Q: Which substitute should be selected for new production designs?

A: SN74F174ADR is recommended for new designs due to its Active product status, ensuring continued availability and manufacturer support. The Tape & Reel packaging format is standard for automated manufacturing processes.

Q: What is the impact of the 74F174SJ being obsolete?

A: The obsolete status indicates the onsemi part is no longer in active production. Existing inventory may be available, but long-term supply cannot be guaranteed. Transition to an active substitute part (SN74F174ADR) is recommended for designs requiring extended production lifecycles.