CD74HC173NSRG4 Equivalent & Substitute Parts

Part Overview

The CD74HC173NSRG4 is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 4-bit configuration and tri-state, non-inverted output. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across a supply voltage range of 2V to 6V with a maximum propagation delay of 34ns at 6V with 50pF load.

Substiute Parts

CD74HC173NSRG4

Texas InstrumentsIn Stock: 828CD74HC173NSRG4 Datasheet

Current PartRFQ

MC74HC175ADG

onsemiIn Stock: 1770MC74HC175ADG Datasheet

MFR RecommendedRFQ

MC74HC175ADR2G

onsemiIn Stock: 1240MC74HC175ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74HC173NSRG4 are identified based on the following critical parameters that define functional equivalence:

• Base product number alignment (74HC series logic family)
• D-Type flip-flop configuration with 1 element and 4-bit structure
• Positive edge trigger type
• Surface mount 16-SOIC package format
• Supply voltage range compatibility (2V ~ 6V)
• Operating temperature range (-55°C ~ 125°C)
• Master reset function capability
• RoHS3 compliance and MSL Level 1 rating

The substitute parts identified (MC74HC175ADG and MC74HC175ADR2G) maintain functional compatibility within the 74HC logic family. Both substitutes are manufactured by onsemi and carry active product status, ensuring long-term availability and supply chain reliability.

Parameter Comparison

Engineering Selection Recommendations

The CD74HC173NSRG4 is classified as obsolete, necessitating transition to active alternatives. Both MC74HC175ADG and MC74HC175ADR2G are manufactured by onsemi and maintain active product status, ensuring continued availability and manufacturing support.

All three parts maintain ROHS3 compliance and MSL Level 1 rating, satisfying environmental and reliability requirements. The substitute parts demonstrate improved electrical performance characteristics, including lower propagation delay (22ns versus 34ns) and reduced quiescent current (4 µA versus 8 µA).

Package geometry differs between the main part (0.209" width) and substitutes (0.154" width), both within 16-SOIC format. This dimensional variation requires PCB layout verification for mechanical compatibility.

The choice between MC74HC175ADG (Tube packaging) and MC74HC175ADR2G (Tape & Reel packaging) depends on procurement volume and assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can MC74HC175ADG and MC74HC175ADR2G be used interchangeably with CD74HC173NSRG4?

A: Both onsemi parts are functionally equivalent within the 74HC logic family and share the same electrical specifications for supply voltage, operating temperature, and trigger characteristics. The primary difference is packaging format (Tube versus Tape & Reel), not electrical performance.

Q: What is the significance of the different 16-SOIC package widths?

A: The CD74HC173NSRG4 uses 16-SOIC with 0.209" width, while substitutes use 0.154" width. Both are standard 16-SOIC packages with identical pin pitch and electrical connectivity. PCB footprint compatibility must be verified during design transition.

Q: Why do the substitute parts show lower clock frequency and propagation delay?

A: The MC74HC175 series specifications (35 MHz, 22ns) differ from the MC74HC173 series (60 MHz, 34ns). Both operate within acceptable parameters for 74HC logic family applications. Application timing requirements must be evaluated to confirm suitability.

Q: What is the difference between Complementary and Tri-State output types?

A: The CD74HC173NSRG4 features tri-state, non-inverted outputs, while substitutes feature complementary outputs. Output configuration differences require circuit-level analysis to confirm functional compatibility in the target application.

Q: Are there supply chain advantages to using the substitute parts?

A: Yes. Both MC74HC175ADG and MC74HC175ADR2G carry active product status from onsemi, providing assured long-term availability and manufacturing continuity compared to the obsolete CD74HC173NSRG4.