74AC374MTC Equivalent & Substitute Parts

Part Overview

The 74AC374MTC is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit capacity and tri-state non-inverted outputs. This component operates at a maximum clock frequency of 155 MHz with a propagation delay of 9.5 ns at 5V with 50 pF load. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this functional specification.

Substiute Parts

74AC374MTC

onsemiIn Stock: 92674AC374MTC Datasheet

Current PartRFQ

MC74AC374DTR2G

onsemiIn Stock: 3574MC74AC374DTR2G Datasheet

DirectRFQ

SN74AC374PWR

Texas InstrumentsIn Stock: 1951SN74AC374PWR Datasheet

DirectRFQ

SN74AC564PW

Texas InstrumentsIn Stock: 920SN74AC564PW Datasheet

DirectRFQ

SN74AC374DBR

Texas InstrumentsIn Stock: 16210SN74AC374DBR Datasheet

SimilarRFQ

SN74AC374PW

Texas InstrumentsIn Stock: 1181SN74AC374PW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74AC374MTC is determined by the following critical parameters:

Functional Equivalence Requirements:

• Type: D-Type flip-flop
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: Tri-State, Non-Inverted
• Trigger Type: Positive Edge
• Clock Frequency: 155 MHz minimum
• Max Propagation Delay: 9.5 ns or better at 5V, 50pF load

Electrical Compatibility Requirements:

• Voltage Supply Range: 2V to 6V
• Current Output High/Low: 24 mA minimum
• Operating Temperature: -40°C to 85°C

Package Compatibility:

• Primary: 20-TSSOP (0.173", 4.40mm Width) for direct pin-for-pin substitution
• Secondary: 20-SSOP (0.209", 5.30mm Width) for similar footprint with layout adjustment

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalents (identical electrical and package specifications):

• MC74AC374DTR2G (onsemi, Active status)
• SN74AC374PWR (Texas Instruments, Active status)
• SN74AC374PW (Texas Instruments, Last Time Buy status)

Similar Package Variant (same electrical specifications, different package):

• SN74AC374DBR (Texas Instruments, 20-SSOP package, Active status)

Functional Variant (different output type, not recommended for direct substitution):

• SN74AC564PW (inverted output, different base part number)

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitutes:

MC74AC374DTR2G and SN74AC374PWR are the preferred substitutes for the obsolete 74AC374MTC. Both parts maintain identical electrical specifications and package configuration (20-TSSOP), enabling direct pin-for-pin replacement. MC74AC374DTR2G carries Active product status from onsemi, while SN74AC374PWR is an Active product from Texas Instruments. Both are ROHS3 compliant and carry REACH Unaffected status.

Secondary Substitute:

SN74AC374PW provides parametric equivalence with identical electrical specifications and 20-TSSOP packaging. This part carries Last Time Buy status, indicating limited availability for future procurement. Use this option only when primary substitutes are unavailable.

Package Variant Option:

SN74AC374DBR offers identical electrical performance but uses a 20-SSOP package (0.209", 5.30mm Width) instead of the 20-TSSOP package. This part is suitable for designs where PCB layout can accommodate the wider package footprint. SN74AC374DBR is Active status and ROHS3 compliant.

Not Recommended:

SN74AC564PW features inverted tri-state outputs and operates at 95 MHz maximum clock frequency, making it functionally incompatible with the 74AC374MTC specification. This part is discontinued at DiGi Electronics and should not be used as a substitute.

Frequently Asked Questions (FAQ)

Q: Can MC74AC374DTR2G directly replace 74AC374MTC without circuit modification?

A: Yes. MC74AC374DTR2G is a direct substitute with identical electrical specifications, output type (tri-state non-inverted), and 20-TSSOP package configuration. No circuit modification is required for pin-for-pin replacement.

Q: What is the difference between SN74AC374PWR and SN74AC374PW?

A: Both parts are electrically identical with the same 20-TSSOP package. The primary difference is packaging format: SN74AC374PWR is supplied in Cut Tape and Digi-Reel format, while SN74AC374PW is supplied in Tube format. SN74AC374PWR has Active product status, while SN74AC374PW is Last Time Buy. For new designs, SN74AC374PWR is preferred.

Q: Can SN74AC374DBR be used as a direct replacement?

A: SN74AC374DBR is electrically equivalent but uses a 20-SSOP package instead of 20-TSSOP. The packages have different footprints (5.30mm vs 4.40mm width). Direct PCB substitution is not possible without layout modification. This part is suitable for new designs where the wider package footprint can be accommodated.

Q: Why is SN74AC564PW listed but not recommended?

A: SN74AC564PW has inverted tri-state outputs, whereas the 74AC374MTC has non-inverted outputs. Additionally, SN74AC564PW operates at 95 MHz maximum clock frequency compared to 155 MHz for the 74AC374MTC. These functional differences make it incompatible for direct substitution.

Q: What is the quiescent current difference between the main part and substitutes?

A: The 74AC374MTC specifies 40 µA quiescent current. MC74AC374DTR2G specifies 8 µA, while SN74AC374PWR and SN74AC374PW specify 4 µA. Lower quiescent current in substitute parts represents improved power efficiency and does not affect functional compatibility.

Q: Are all recommended substitutes ROHS3 compliant?

A: Yes. MC74AC374DTR2G, SN74AC374PWR, SN74AC374PW, and SN74AC374DBR are all ROHS3 compliant. The original 74AC374MTC does not specify RoHS status due to its obsolete classification.