CD74HC173MG4 Equivalent & Substitute Parts

Part Overview

The CD74HC173MG4 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 outputs. This component is classified as a Master Reset function device in the 74HC logic series and is packaged in a 16-SOIC surface mount configuration.

The CD74HC173MG4 has been discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

CD74HC173MG4

Texas InstrumentsIn Stock: 757CD74HC173MG4 Datasheet

Current PartRFQ

CD74HC173M

Texas InstrumentsIn Stock: 2910CD74HC173M Datasheet

MFR RecommendedRFQ

74HC173D,653

NXP SemiconductorsIn Stock: 1709574HC173D,653 Datasheet

MFR RecommendedRFQ

MC74HC175ADG

onsemiIn Stock: 1770MC74HC175ADG Datasheet

MFR RecommendedRFQ

MC74HC175ADR2G

onsemiIn Stock: 1240MC74HC175ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC173MG4 is determined by the following critical parameters:

Primary Substitution Criteria:

• D-Type flip-flop architecture with Master Reset function
• 4-bit configuration with 1 element
• 16-SOIC surface mount package (0.154", 3.90mm Width)
• Voltage supply range: 2V to 6V
• Operating temperature range compatibility: -55°C to 125°C or -40°C to 125°C
• Tri-state output capability
• RoHS3 compliance

Secondary Compatibility Parameters:

• Clock frequency (minimum 35 MHz acceptable)
• Propagation delay (maximum 34 ns at 6V, 50pF)
• Output current drive capability (minimum 5.2 mA)
• Quiescent current (maximum 8 µA)

Substitute parts must maintain functional equivalence in the 74HC logic family while meeting the electrical and mechanical constraints of the original design.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CD74HC173M

The CD74HC173M from Texas Instruments is the direct equivalent to the CD74HC173MG4. This part maintains identical electrical specifications, including clock frequency, propagation delay, output current drive, and operating temperature range. The CD74HC173M is currently in Last Time Buy status with 2,820 units in stock, providing immediate availability. Both parts are ROHS3 compliant and share the same base product number (74HC173). The only difference is packaging format (Tube versus standard packaging), which does not affect functional performance.

Secondary Substitute: 74HC173D,653

The 74HC173D,653 from NXP Semiconductors is an active production alternative with superior electrical performance. This part offers higher clock frequency (95 MHz versus 60 MHz), faster propagation delay (30 ns versus 34 ns), and lower quiescent current (4 µA versus 8 µA). The 74HC173D,653 maintains tri-state, non-inverted output configuration and is available in high quantity (17,076 units). The operating temperature range is -40°C to 125°C, which is acceptable for most applications requiring -55°C to 125°C operation if the lower temperature limit is not critical. This part provides long-term availability as an active product.

Tertiary Substitutes: MC74HC175ADG and MC74HC175ADR2G

The MC74HC175ADG and MC74HC175ADR2G from onsemi are functionally compatible alternatives with the following considerations: these parts feature complementary output configuration rather than tri-state, non-inverted outputs. Both are active products with ROHS3 compliance and identical voltage supply range. The MC74HC175ADG is supplied in Tube packaging, while MC74HC175ADR2G is supplied in Tape & Reel format. These parts are suitable only for applications where complementary outputs are acceptable or where tri-state functionality is not required.

Recommendation Priority:

1. CD74HC173M (direct equivalent, same manufacturer)
2. 74HC173D,653 (active production, superior performance)
3. MC74HC175ADG or MC74HC175ADR2G (only if output configuration change is acceptable)

Frequently Asked Questions (FAQ)

Q: Can the CD74HC173M be used as a direct replacement for the CD74HC173MG4?

A: Yes. The CD74HC173M is functionally and electrically identical to the CD74HC173MG4. Both parts share the same base product number (74HC173), identical specifications for clock frequency, propagation delay, output current, and operating temperature range. The difference in packaging format does not affect circuit performance.

Q: What is the difference between the CD74HC173M and the 74HC173D,653?

A: Both are D-Type 4-bit flip-flops in 16-SOIC packages with tri-state outputs. The 74HC173D,653 offers superior performance with higher clock frequency (95 MHz versus 60 MHz), faster propagation delay (30 ns versus 34 ns), and lower quiescent current (4 µA versus 8 µA). The 74HC173D,653 is an active product from NXP, while the CD74HC173M is in Last Time Buy status from Texas Instruments. The 74HC173D,653 has a narrower operating temperature range (-40°C to 125°C versus -55°C to 125°C).

Q: Why are the MC74HC175ADG and MC74HC175ADR2G listed as substitutes if they have complementary outputs?

A: The MC74HC175ADG and MC74HC175ADR2G are listed as available alternatives within the 74HC logic family with the same 4-bit D-Type flip-flop architecture and 16-SOIC package. However, their complementary output configuration differs from the tri-state, non-inverted outputs of the CD74HC173MG4. These parts are suitable substitutes only for applications where complementary outputs are functionally acceptable or where tri-state capability is not required.

Q: Are all substitute parts RoHS3 compliant?

A: The CD74HC173M, MC74HC175ADG, and MC74HC175ADR2G are confirmed ROHS3 compliant. The 74HC173D,653 from NXP does not specify RoHS status in the provided data. Verify RoHS compliance with the supplier if regulatory compliance is a design requirement.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging is used for manual component handling and smaller quantity orders, while Tape & Reel packaging is optimized for automated assembly processes and higher volume production. Both packaging formats contain identical components; the difference is in presentation and handling method. Select packaging based on your assembly process requirements.

Q: Can I use the 74HC173D,653 in applications requiring -55°C operation?

A: The 74HC173D,653 is specified for -40°C to 125°C operation. If your application requires operation at temperatures below -40°C, the CD74HC173M or MC74HC175ADG/MC74HC175ADR2G (both rated -55°C to 125°C) are required. Verify your actual operating temperature requirements before selecting a substitute.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: D-Type flip-flop architecture, 4-bit configuration, 16-SOIC surface mount package, 2V to 6V supply voltage range, tri-state output capability (for direct equivalents), and RoHS3 compliance. Secondary considerations include clock frequency, propagation delay, output current drive, and operating temperature range. Parts with complementary outputs (MC74HC175 series) are compatible only if output configuration change is acceptable in your circuit design.