74ACT174SJX Equivalent & Substitute Parts

Part Overview

The 74ACT174SJX 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 ongoing design support and procurement continuity. The part operates at a maximum clock frequency of 200 MHz with a propagation delay of 10.5ns at 5V with 50pF load, housed in a 16-SOIC surface mount package.

Substiute Parts

74ACT174SJX

onsemiIn Stock: 148174ACT174SJX Datasheet

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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 74ACT174SJX are identified based on strict electrical and mechanical compatibility criteria. The following parameters must align for valid substitution:

• Series designation (74ACT)
• Function (Master Reset)
• Type (D-Type Flip-Flop)
• Number of Elements (1)
• Number of Bits per Element (6)
• Output Type (Non-Inverted)
• Trigger Type (Positive Edge)
• Voltage Supply Range (4.5V ~ 5.5V)
• Output Current Capability (24mA / 24mA minimum)
• Package Type (16-SOIC)
• Mounting Type (Surface Mount)

The identified substitute parts CD74ACT174M and CD74ACT174M96, both manufactured by Harris Corporation, meet these core electrical and mechanical requirements. Both parts maintain the same functional architecture, logic family, and package footprint as the original component.

Parameter Comparison

Engineering Selection Recommendations

Both CD74ACT174M and CD74ACT174M96 are functionally equivalent substitutes for the 74ACT174SJX within the 74ACT logic family. Selection between these options should be based on the following factors:

CD74ACT174M (Harris Corporation): Supplied in tube packaging with RoHS non-compliant status. Suitable for applications where RoHS compliance is not a design requirement.

CD74ACT174M96 (Harris Corporation): Supplied in bulk packaging with RoHS non-compliant status. Offers higher inventory availability (4294 pcs) compared to CD74ACT174M (1319 pcs). Recommended for high-volume procurement scenarios.

Both substitute parts operate within the same voltage supply range (4.5V ~ 5.5V) and maintain identical output current specifications (24mA / 24mA). The substitute parts feature extended operating temperature ranges (-55°C ~ 125°C) compared to the original part (-40°C ~ 85°C), providing broader environmental compatibility. Clock frequency and propagation delay specifications differ; the substitute parts operate at 80 MHz maximum with 14ns propagation delay versus the original part's 200 MHz and 10.5ns specifications. These differences must be evaluated against specific circuit timing requirements.

Frequently Asked Questions (FAQ)

Q: Can CD74ACT174M and CD74ACT174M96 be used interchangeably with 74ACT174SJX?

A: Yes, both Harris Corporation parts are functionally equivalent substitutes. They maintain identical logic family designation, function, element count, bit configuration, output type, trigger type, voltage supply range, and output current specifications. The primary differences are packaging format (tube versus bulk) and inventory availability.

Q: What are the key differences between the substitute parts and the original 74ACT174SJX?

A: The substitute parts operate at a lower maximum clock frequency (80 MHz versus 200 MHz) and have slightly higher propagation delay (14ns versus 10.5ns). However, both maintain the same voltage supply range and output current capability. The substitute parts feature an extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C) and lower quiescent current (8 µA versus 40 µA).

Q: Are there package compatibility concerns when substituting these parts?

A: Both substitute parts use 16-SOIC surface mount packages. The physical dimensions differ slightly: the original part measures 0.209" (5.30mm) width, while the substitute parts measure 0.154" (3.90mm) width. PCB footprint compatibility must be verified before substitution, as the narrower package may not align with existing board layouts designed for the wider original package.

Q: What is the RoHS compliance status of these substitute parts?

A: Both CD74ACT174M and CD74ACT174M96 are RoHS non-compliant. If RoHS compliance is required for your application, alternative parts must be sourced.

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

A: For new designs, component selection should prioritize current availability and supply chain stability. CD74ACT174M96 offers significantly higher inventory (4294 pcs) in bulk packaging. However, timing requirements must be evaluated; if the application requires the original part's 200 MHz clock frequency or 10.5ns propagation delay, alternative logic components from current product lines should be considered.