74F175SJ Equivalent & Substitute Parts

Part Overview

The 74F175SJ is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 4-bit configuration and complementary output type. This component operates at a clock frequency of 140 MHz with a maximum propagation delay of 8.5ns at 5V with 50pF load. The part is currently classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity.

Substiute Parts

74F175SJ

onsemiIn Stock: 94074F175SJ Datasheet

Current PartRFQ

SN74F175NSR

Texas InstrumentsIn Stock: 5501SN74F175NSR Datasheet

DirectRFQ

SN74F175D

Texas InstrumentsIn Stock: 2301SN74F175D Datasheet

SimilarRFQ

SN74F175DR

Texas InstrumentsIn Stock: 3728SN74F175DR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F175SJ are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Parameters (Must Match):

• D-Type flip-flop configuration with 1 element, 4-bit per element
• Complementary output type
• Positive edge trigger
• Clock frequency: 140 MHz
• Propagation delay: 8.5ns @ 5V, 50pF
• Output current: 1mA (high), 20mA (low)
• Supply voltage: 4.5V ~ 5.5V
• Quiescent current: 34 mA
• Operating temperature: 0°C ~ 70°C

Mechanical Parameters (Must Match):

• Surface mount mounting type
• 16-SOIC package family
• Master reset function

The substitute parts identified are manufactured by Texas Instruments and maintain identical electrical specifications and functional characteristics. Variations in package dimensions (0.209" vs 0.154" width) and packaging format (Tape & Reel vs Tube) do not affect electrical compatibility but may impact PCB layout and procurement logistics.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74F175NSR (Texas Instruments)

The SN74F175NSR is the preferred substitute for the obsolete 74F175SJ. This part maintains active product status with Texas Instruments, ensuring long-term availability and supply chain stability. It is ROHS3 compliant and supplied in Tape & Reel packaging format, suitable for automated assembly processes. All electrical and functional parameters are identical to the original part.

Secondary Recommendation: SN74F175DR (Texas Instruments)

The SN74F175DR is an active product alternative with identical electrical specifications. This part is also ROHS3 compliant and supplied in Tape & Reel format. The package dimensions differ slightly (0.154" width vs 0.209" width), which may require PCB layout verification but does not affect electrical compatibility.

Tertiary Option: SN74F175D (Texas Instruments)

The SN74F175D is classified as Last Time Buy status, indicating limited future availability. While electrically equivalent and ROHS3 compliant, this part is supplied in Tube packaging, which may not be optimal for high-volume automated assembly. This option is suitable only for applications with extended lead times or where Tube packaging is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the SN74F175NSR directly replace the 74F175SJ without circuit modifications?

A: Yes. The SN74F175NSR maintains identical electrical specifications, functional characteristics, and pin configuration. No circuit modifications are required for direct substitution.

Q: What is the difference between the package dimensions listed for different substitute parts?

A: The 74F175SJ and SN74F175NSR use 16-SOIC packages with 0.209" width, while SN74F175D and SN74F175DR use 16-SOIC packages with 0.154" width. Both are 16-SOIC family packages and are electrically compatible. PCB footprint verification is recommended when switching between these package variants.

Q: Why is the 74F175SJ marked as obsolete?

A: The 74F175SJ is an onsemi product that has reached end-of-life status. Texas Instruments continues to manufacture equivalent parts under the SN74F175 designation, providing continuity for this logic function.

Q: Are all substitute parts RoHS compliant?

A: Yes. All Texas Instruments substitute parts (SN74F175NSR, SN74F175D, SN74F175DR) are ROHS3 compliant. The original 74F175SJ RoHS status was not specified in available documentation.

Q: What packaging format should I select for new designs?

A: For new designs and high-volume production, the SN74F175NSR in Tape & Reel format is recommended. This part is in active production status and optimized for automated assembly processes.

Q: Is the propagation delay specification critical for substitution?

A: The propagation delay of 8.5ns @ 5V, 50pF is a key parameter for timing-critical applications. All recommended substitutes maintain this specification. The SN74F175DR does not list this parameter in available documentation; timing verification is recommended if this part is selected.

Q: Can I use these parts interchangeably in existing designs?

A: Yes, provided the package dimensions are compatible with your PCB layout. The 0.209" and 0.154" width variants use different footprints. Verify footprint compatibility before substitution.