74ACT174SCX Equivalent & Substitute Parts

Part Overview

The 74ACT174SCX is a D-type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 6 bits per element in a 16-SOIC surface mount package. This component functions as a master reset flip-flop with positive edge triggering and non-inverted outputs. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations where legacy compatibility is required.

Substiute Parts

74ACT174SCX

onsemiIn Stock: 1044074ACT174SCX Datasheet

Current PartRFQ

CD74ACT174M

Harris CorporationIn Stock: 1384CD74ACT174M Datasheet

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CD74ACT174M96

Harris CorporationIn Stock: 4337CD74ACT174M96 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ACT174SCX are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Functional Parameters:

• Series designation (74ACT)
• Type (D-Type Flip-Flop)
• Number of Elements (1)
• Number of Bits per Element (6)
• Trigger Type (Positive Edge)
• Output Type (Non-Inverted)
• Function (Master Reset)

Electrical Parameters:

• Voltage Supply Range (4.5V ~ 5.5V)
• Output Current Capability (24mA, 24mA)
• Package compatibility (16-SOIC)

Mechanical Parameters:

• Package / Case (16-SOIC with 0.154", 3.90mm Width)
• Mounting Type (Surface Mount)

The substitute parts CD74ACT174M and CD74ACT174M96, both manufactured by Harris Corporation, maintain identical functional architecture, electrical supply requirements, output drive capabilities, and physical packaging. These parts are direct substitutes within the 74ACT logic family.

Parameter Comparison

Engineering Selection Recommendations

All three parts—74ACT174SCX, CD74ACT174M, and CD74ACT174M96—are classified as obsolete. Selection between these parts should be based on the following criteria:

For applications requiring maximum performance: The 74ACT174SCX offers the highest clock frequency (200 MHz) and shortest propagation delay (10.5 ns), making it suitable for timing-critical circuits where the onsemi part remains available.

For applications with extended temperature requirements: Both Harris Corporation substitutes (CD74ACT174M and CD74ACT174M96) support an operating temperature range of -55°C ~ 125°C, compared to the onsemi part's -40°C ~ 85°C range. This extended range is beneficial for industrial and military applications.

For packaging and inventory considerations: CD74ACT174M is supplied in tube packaging, while CD74ACT174M96 is supplied in bulk packaging. Selection depends on procurement and assembly requirements.

Compliance note: The Harris Corporation parts are RoHS non-compliant. The onsemi part carries REACH Unaffected status. Compliance requirements should be verified against system specifications before final selection.

Frequently Asked Questions (FAQ)

Q: Can CD74ACT174M and CD74ACT174M96 be used interchangeably with 74ACT174SCX?

A: Yes, both Harris Corporation parts are direct functional substitutes. They maintain identical logic architecture, pin configuration, electrical supply requirements, and output drive capabilities. The primary differences are clock frequency (80 MHz vs. 200 MHz), propagation delay (14 ns vs. 10.5 ns), and operating temperature range (-55°C ~ 125°C vs. -40°C ~ 85°C). Application timing requirements must be verified before substitution.

Q: What is the difference between CD74ACT174M and CD74ACT174M96?

A: Both parts are functionally identical with the same electrical specifications. The difference lies in packaging: CD74ACT174M is supplied in tube packaging, while CD74ACT174M96 is supplied in bulk packaging. Selection depends on procurement volume and assembly line requirements.

Q: Are there any compliance differences between these parts?

A: The onsemi 74ACT174SCX carries REACH Unaffected status. Both Harris Corporation substitutes (CD74ACT174M and CD74ACT174M96) are RoHS non-compliant. System compliance requirements must be evaluated before part selection.

Q: What is the impact of the lower clock frequency in the Harris parts?

A: The Harris substitutes operate at 80 MHz compared to the onsemi part's 200 MHz, with a corresponding propagation delay increase from 10.5 ns to 14 ns. For applications operating below 80 MHz, this difference is not functionally significant. Applications requiring higher clock frequencies should retain the onsemi part if available.

Q: Are all three parts suitable for industrial temperature applications?

A: The Harris Corporation parts support -55°C ~ 125°C, making them suitable for extended industrial and military temperature ranges. The onsemi part supports -40°C ~ 85°C, which covers standard commercial and industrial applications. Application temperature requirements should determine part selection.