MM74HC174MTCX Equivalent & Substitute Parts

Part Overview

The MM74HC174MTCX is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 6 bits per element in a 16-TSSOP surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The MM74HC174MTCX operates across a 2V to 6V supply range with a maximum propagation delay of 28ns at 6V with 50pF load. It is designed for positive edge triggering with non-inverted output configuration and includes master reset functionality.

Substiute Parts

MM74HC174MTCX

onsemiIn Stock: 1189MM74HC174MTCX Datasheet

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MC74HC174ADTR2G

onsemiIn Stock: 2960MC74HC174ADTR2G Datasheet

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NLV74HC174ADTR2G

onsemiIn Stock: 3275NLV74HC174ADTR2G Datasheet

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74HC174PW,118

Nexperia USA Inc.In Stock: 121674HC174PW,118 Datasheet

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74HC174PW-Q100J

Nexperia USA Inc.In Stock: 114374HC174PW-Q100J Datasheet

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74HC174DB,112

Nexperia USA Inc.In Stock: 92774HC174DB,112 Datasheet

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SN74HC174DBR

Texas InstrumentsIn Stock: 2948SN74HC174DBR Datasheet

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SN74HC174PW

Texas InstrumentsIn Stock: 2954SN74HC174PW Datasheet

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SN74HC174PWR

Texas InstrumentsIn Stock: 3239SN74HC174PWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC174MTCX is determined by the following core parameters:

• Base product number (74HC174 series)
• Functional type (D-Type flip-flop, 1 element, 6 bits per element)
• Output configuration (non-inverted)
• Trigger mechanism (positive edge)
• Voltage supply range (2V ~ 6V minimum compatibility)
• Package compatibility (16-TSSOP or 16-SSOP mechanical equivalents)
• Electrical characteristics (propagation delay, output current, quiescent current within acceptable ranges)

Substitute parts are grouped into three categories:

Similar Parts (Direct Functional Equivalents): MC74HC174ADTR2G, NLV74HC174ADTR2G, 74HC174DB,112, SN74HC174DBR, and SN74HC174PW maintain the same base product number and core functionality with variations in product status, temperature range, and packaging format.

Upgrade Parts (Enhanced Performance): 74HC174PW,118 and 74HC174PW-Q100J offer improved clock frequency (107 MHz vs. 31 MHz), lower propagation delay characteristics, and extended temperature ranges, with the latter including automotive qualification (AEC-Q100).

Package Variants: 74HC174DB,112 and SN74HC174DBR use 16-SSOP packaging (0.209", 5.30mm Width) instead of 16-TSSOP, requiring PCB layout verification for mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement with Active Status: MC74HC174ADTR2G (onsemi) is the primary recommendation. It maintains identical functional specifications, operates in the same voltage range, and is currently in active production status. This part offers improved performance characteristics including lower propagation delay (19ns vs. 28ns) and reduced quiescent current (4 µA vs. 8 µA), with extended temperature range support (-55°C ~ 125°C).

For Extended Temperature Range Applications: MC74HC174ADTR2G and 74HC174PW,118 both support -55°C to 125°C or -40°C to 125°C operating ranges respectively, compared to the original part's -40°C to 85°C limit.

For Automotive Applications: 74HC174PW-Q100J includes AEC-Q100 qualification and is suitable for automotive-grade designs requiring formal qualification documentation.

For High-Speed Applications: 74HC174PW,118 and 74HC174PW-Q100J provide 107 MHz clock frequency capability, significantly exceeding the original 31 MHz specification.

For Package Compatibility Verification: Parts using 16-SSOP packaging (74HC174DB,112 and SN74HC174DBR) require PCB layout confirmation due to different mechanical dimensions (0.209", 5.30mm Width vs. 0.173", 4.40mm Width).

For Procurement Continuity: SN74HC174PWR (Texas Instruments) and SN74HC174DBR (Texas Instruments) are active production parts with established supply chains and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can MC74HC174ADTR2G directly replace MM74HC174MTCX without circuit modifications?

A: Yes. MC74HC174ADTR2G maintains identical functional specifications, voltage supply range (2V ~ 6V), output configuration (non-inverted), and package type (16-TSSOP). The improved electrical characteristics (lower propagation delay and quiescent current) are backward compatible with designs specified for the original part.

Q: What is the difference between 16-TSSOP and 16-SSOP packages?

A: 16-TSSOP measures 0.173" width (4.40mm), while 16-SSOP measures 0.209" width (5.30mm). These are mechanically distinct packages requiring different PCB footprints. Parts using 16-SSOP (74HC174DB,112 and SN74HC174DBR) cannot be used as drop-in replacements without PCB redesign.

Q: Why is 74HC174PW-Q100J recommended for automotive applications?

A: 74HC174PW-Q100J includes AEC-Q100 qualification, which certifies the part meets automotive industry reliability and quality standards. This qualification is required for automotive-grade designs and supply chain compliance.

Q: What is the significance of product status (Active vs. Obsolete)?

A: Active status indicates current production and established long-term supply availability. Obsolete status indicates the manufacturer has discontinued production, making future procurement uncertain. For new designs, active parts are preferred for supply chain reliability.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant. The original MM74HC174MTCX does not specify RoHS status. All active and recommended alternatives meet current environmental compliance requirements.

Q: Can SN74HC174PW be used as a substitute despite being discontinued at DiGi Electronics?

A: SN74HC174PW maintains functional compatibility but is discontinued at DiGi Electronics. For new designs or long-term production, SN74HC174PWR (active status) is the preferred Texas Instruments alternative.