74F175SCX Equivalent & Substitute Parts

Part Overview

The 74F175SCX is a D-type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 4 bits per element in a 16-SOIC surface mount package. This component functions as a master reset flip-flop with complementary outputs and positive edge triggering, operating at a maximum clock frequency of 140 MHz.

The 74F175SCX is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing production requirements, maintenance operations, and system redesigns where this component is specified in existing designs.

Substiute Parts

74F175SCX

onsemiIn Stock: 356574F175SCX Datasheet

Current PartRFQ

SN74F175D

Texas InstrumentsIn Stock: 2301SN74F175D Datasheet

DirectRFQ

SN74F175DR

Texas InstrumentsIn Stock: 3728SN74F175DR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F175SCX are qualified based on strict electrical and mechanical parameter matching:

Critical Matching Parameters:

• Type: D-Type Flip-Flop with Master Reset function
• Number of Elements: 1
• Number of Bits per Element: 4
• Clock Frequency: 140 MHz minimum
• Trigger Type: Positive Edge
• Output Type: Complementary
• Voltage Supply Range: 4.5V ~ 5.5V
• Operating Temperature Range: 0°C ~ 70°C
• Package: 16-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

The identified substitute parts SN74F175D and SN74F175DR, both manufactured by Texas Instruments, meet all critical electrical and mechanical parameters. Both parts share the same base product number (74F175) and functional specifications as the 74F175SCX. The primary differences between substitutes relate to product status, packaging format (Tube versus Tape & Reel), and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

SN74F175DR (Texas Instruments) - Recommended Primary Substitute

The SN74F175DR is the preferred substitute for the obsolete 74F175SCX. This part maintains active product status with Texas Instruments, ensuring long-term availability and supply chain stability. The SN74F175DR is ROHS3 compliant and carries MSL 1 (Unlimited) moisture sensitivity rating, matching the original component's environmental specifications. Packaging in Tape & Reel format supports automated assembly processes. Current inventory of 3,639 pieces is available.

SN74F175D (Texas Instruments) - Secondary Substitute

The SN74F175D provides an alternative substitute option with identical electrical specifications and MSL rating. This part carries Last Time Buy status, indicating limited future availability. The component is ROHS3 compliant and packaged in Tube format. Current inventory of 2,197 pieces is available. This option is suitable for applications where Tube packaging is acceptable or preferred.

Both Texas Instruments substitutes are functionally and mechanically interchangeable with the 74F175SCX within the specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can SN74F175D and SN74F175DR be used interchangeably with 74F175SCX?

A: Yes. Both parts are direct functional and mechanical equivalents. All critical electrical parameters—clock frequency, propagation delay, output current, supply voltage, and operating temperature range—are identical. The 16-SOIC package dimensions and pin configuration are the same. The primary difference is packaging format (Tube versus Tape & Reel) and product lifecycle status.

Q: What is the difference between SN74F175D and SN74F175DR?

A: Both parts are electrically identical. SN74F175D is packaged in Tube format with Last Time Buy status. SN74F175DR is packaged in Tape & Reel format with Active product status. For new designs and long-term production, SN74F175DR is recommended due to its active status and automated assembly compatibility.

Q: Are there any compliance differences between the substitute parts and the original 74F175SCX?

A: The Texas Instruments substitutes (SN74F175D and SN74F175DR) are ROHS3 compliant, while the original onsemi part does not specify RoHS status. Both substitutes maintain REACH Unaffected status and MSL 1 (Unlimited) rating, matching the original component's environmental specifications.

Q: Will the 16-SOIC package fit existing PCB layouts designed for 74F175SCX?

A: Yes. The package dimensions are identical: 16-SOIC (0.154", 3.90mm Width). Pin-to-pin compatibility is maintained, allowing direct substitution on existing printed circuit boards without layout modifications.

Q: What is the propagation delay specification for SN74F175DR?

A: The SN74F175DR datasheet does not specify maximum propagation delay in the provided technical data. The SN74F175D specifies 8.5 ns @ 5V, 50pF, matching the original 74F175SCX specification. For critical timing applications, Texas Instruments datasheet documentation should be consulted.