74AC174SC Equivalent & Substitute Parts

Part Overview

The 74AC174SC 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 currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

74AC174SC

onsemiIn Stock: 444674AC174SC Datasheet

Current PartRFQ

CD74AC174M96

Texas InstrumentsIn Stock: 1134CD74AC174M96 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74AC174SC is determined by strict equivalence across the following critical parameters:

• Logic Function: D-Type Flip Flop with 1 element, 6 bits per element, positive edge trigger, non-inverted output, and master reset function
• Package Compatibility: 16-SOIC (0.154", 3.90mm Width) surface mount package
• Series Compatibility: 74AC logic family
• Electrical Characteristics: Output current capability (24mA high/low), supply voltage range, quiescent current, and propagation delay performance

The CD74AC174M96 manufactured by Texas Instruments meets these substitution criteria as an active product within the same 74AC series, sharing identical functional architecture and package specifications.

Parameter Comparison

Engineering Selection Recommendations

The CD74AC174M96 from Texas Instruments is the qualified substitute for the obsolete 74AC174SC. Selection is based on the following engineering criteria:

Functional Equivalence: Both parts implement identical D-Type Flip Flop logic with 6-bit configuration, master reset function, and positive edge triggering within the 74AC series.

Package Compatibility: Both components use the 16-SOIC (0.154", 3.90mm Width) surface mount package, enabling direct PCB footprint compatibility without layout modifications.

Compliance Status: The CD74AC174M96 carries active product status and ROHS3 compliance certification, ensuring long-term availability and regulatory alignment for new designs and production continuity.

Performance Considerations: The CD74AC174M96 exhibits lower quiescent current (8 µA versus 40 µA) and extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C), providing enhanced performance margins in power-sensitive and temperature-extreme applications. The substitute part operates at 95 MHz clock frequency with 14.6ns propagation delay, compared to the original 125 MHz and 8.5ns specifications. Supply voltage range is slightly narrower (1.5V ~ 5.5V versus 2V ~ 6V) but remains compatible with standard 5V logic systems.

Frequently Asked Questions (FAQ)

Q: Can the CD74AC174M96 directly replace the 74AC174SC without PCB modifications?

A: Yes. Both parts share identical 16-SOIC (0.154", 3.90mm Width) surface mount package specifications and pin configurations, enabling direct substitution without PCB layout changes.

Q: What are the key differences between these parts?

A: The primary differences are product status (obsolete versus active), quiescent current consumption (40 µA versus 8 µA), clock frequency rating (125 MHz versus 95 MHz), propagation delay (8.5ns versus 14.6ns), and operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C). Both maintain identical functional logic, output current capability, and package form factor.

Q: Is the CD74AC174M96 suitable for applications requiring the full 125 MHz clock frequency specification?

A: The CD74AC174M96 is rated for 95 MHz maximum clock frequency. Applications requiring operation at 125 MHz must evaluate whether the 95 MHz specification meets system timing requirements or if alternative components are necessary.

Q: Does the narrower supply voltage range of the CD74AC174M96 affect compatibility?

A: The CD74AC174M96 supply range of 1.5V ~ 5.5V encompasses standard 5V logic system operation. Applications operating below 1.5V or above 5.5V require evaluation against specific system requirements.

Q: What compliance advantages does the CD74AC174M96 offer?

A: The CD74AC174M96 is ROHS3 compliant and carries active product status, ensuring regulatory alignment and long-term manufacturing availability compared to the obsolete 74AC174SC.

Q: Are there packaging options for the CD74AC174M96?

A: The CD74AC174M96 is supplied in Tape & Reel (TR) packaging format, suitable for automated assembly processes.