MM74HC174MTC Equivalent & Substitute Parts

Part Overview

The MM74HC174MTC 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 MM74HC174MTC operates within the 74HC logic series and is designed for positive edge-triggered applications with a master reset function. Current availability of 676 pieces in stock provides limited supply for new designs.

Substiute Parts

MM74HC174MTC

onsemiIn Stock: 780MM74HC174MTC 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 of the MM74HC174MTC is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Base product number: 74HC174
• Type: D-Type flip-flop
• Number of elements: 1
• Number of bits per element: 6
• Trigger type: Positive edge
• Output type: Non-inverted
• Voltage supply range: 2V ~ 6V (minimum overlap required)
• Mounting type: Surface mount

Package Compatibility:

• Primary package: 16-TSSOP (0.173", 4.40mm Width) — direct mechanical and electrical compatibility
• Secondary package: 16-SSOP (0.209", 5.30mm Width) — functionally equivalent but requires PCB layout modification

Substitute parts are grouped into two categories:

1. Direct Substitutes (16-TSSOP Package): Parts maintaining identical package footprint and pinout, allowing drop-in replacement without PCB modification.

2. Functional Equivalents (16-SSOP Package): Parts with identical electrical function but different package dimensions, requiring PCB layout adjustment.

Parameter Comparison

Engineering Selection Recommendations

For Direct Drop-In Replacement (16-TSSOP Package):

• MC74HC174ADTR2G (onsemi): Active product status with improved performance specifications (35 MHz clock frequency, 19ns propagation delay). Extended temperature range (-55°C ~ 125°C) and lower quiescent current (4 µA) provide enhanced operational margin. ROHS3 compliant. Recommended for new designs requiring onsemi sourcing continuity.

• 74HC174PW,118 (Nexperia USA Inc.): Active product with superior clock frequency (107 MHz) and extended temperature range (-40°C ~ 125°C). ROHS3 compliant. Suitable for applications requiring higher speed performance.

• 74HC174PW-Q100J (Nexperia USA Inc.): Active product with AEC-Q100 automotive qualification. Identical electrical specifications to 74HC174PW,118. Required for automotive-grade applications.

• SN74HC174PWR (Texas Instruments): Active product with established supply chain. Maintains original temperature range (-40°C ~ 85°C) and propagation delay (27ns). ROHS3 compliant. Recommended for applications requiring Texas Instruments sourcing.

For Functional Equivalence with Package Change (16-SSOP Package):

• 74HC174DB,112 (Nexperia USA Inc.): Active product with superior performance (107 MHz clock frequency). Requires PCB layout modification due to 16-SSOP package (0.209", 5.30mm Width). ROHS3 compliant.

• SN74HC174DBR (Texas Instruments): Active product with established supply. Maintains original temperature range and propagation delay specifications. Requires PCB layout modification. ROHS3 compliant.

Parts to Avoid for New Designs:

• NLV74HC174ADTR2G: Obsolete status limits long-term availability.
• SN74HC174PW: Discontinued at DiGi Electronics; limited procurement viability.

Frequently Asked Questions (FAQ)

Q: Can MM74HC174MTC be directly replaced with any 74HC174 variant?

A: Direct replacement requires matching the 16-TSSOP package footprint and pinout. Parts in 16-SSOP packages require PCB layout modification. All 74HC174 variants share identical pin configuration and electrical function within the 2V ~ 6V supply range.

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

A: Both are 16-pin surface mount packages with identical pinout. The 16-TSSOP measures 0.173" width (4.40mm), while 16-SSOP measures 0.209" width (5.30mm). PCB footprints are not interchangeable without layout redesign.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed carry ROHS3 compliance certification. The original MM74HC174MTC does not specify RoHS status.

Q: Which substitute offers the best performance improvement?

A: The 74HC174PW,118 and 74HC174PW-Q100J (Nexperia) provide the highest clock frequency (107 MHz) compared to the original 31 MHz specification. Propagation delay remains equivalent at 28ns.

Q: Can I use 74HC174PW-Q100J in non-automotive applications?

A: Yes. AEC-Q100 qualification is a superset of standard requirements. The part is suitable for any application within its electrical specifications.

Q: What is the supply voltage compatibility range?

A: All substitute parts operate within 2V ~ 6V supply range, matching the original MM74HC174MTC specification. Extended temperature range variants (MC74HC174ADTR2G, Nexperia parts) support -55°C to 125°C operation.

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