74ACTQ374SCX Equivalent & Substitute Parts

Part Overview

The 74ACTQ374SCX is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit positive edge triggering in a 20-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The 74ACTQ374SCX operates at a clock frequency of 85 MHz with a maximum propagation delay of 9ns at 5V with 50pF load. It provides tri-state, non-inverted outputs with 24mA drive capability on both high and low outputs, operating across a supply voltage range of 4.5V to 5.5V.

Substiute Parts

74ACTQ374SCX

onsemiIn Stock: 452174ACTQ374SCX Datasheet

Current PartRFQ

MC74ACT374DWG

onsemiIn Stock: 2288MC74ACT374DWG Datasheet

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MC74ACT374DWR2G

onsemiIn Stock: 1886MC74ACT374DWR2G Datasheet

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CD74ACT374M

Harris CorporationIn Stock: 1946CD74ACT374M Datasheet

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CD74ACT374M96

Texas InstrumentsIn Stock: 2372CD74ACT374M96 Datasheet

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SN74ACT374DW

Texas InstrumentsIn Stock: 3404SN74ACT374DW Datasheet

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SN74ACT374DWR

Texas InstrumentsIn Stock: 2450SN74ACT374DWR Datasheet

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SN74ACT374NSR

Texas InstrumentsIn Stock: 2308SN74ACT374NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACTQ374SCX 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
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Performance Compatibility Parameters:

• Voltage - Supply: 4.5V ~ 5.5V (must match or exceed)
• Current - Output High/Low: 24mA / 24mA (must meet or exceed)
• Operating Temperature: -40°C ~ 85°C (must meet or exceed)

Acceptable Variations:

• Clock Frequency: May exceed 85 MHz (higher performance acceptable)
• Max Propagation Delay: May be lower than 9ns (faster performance acceptable)
• Current - Quiescent (Iq): May be lower than 40 µA (reduced power acceptable)
• Input Capacitance: May vary within logic IC standards
• Product Status: Active or Last Time Buy preferred over Obsolete
• Compliance: RoHS3 compliance preferred for new designs

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

SN74ACT374DWR and SN74ACT374DW from Texas Instruments are the preferred substitutes. Both parts maintain identical functional specifications, matching output drive capability (24mA/24mA), supply voltage range (4.5V ~ 5.5V), and operating temperature range (-40°C ~ 85°C). These parts feature improved performance with 160 MHz clock frequency and reduced propagation delay (8.5ns), while maintaining ROHS3 compliance and MSL 1 rating. SN74ACT374DWR is available in Cut Tape & Digi-Reel packaging with Active product status.

Secondary Substitutes (Functional Equivalence with Minor Variations):

MC74ACT374DWR2G and MC74ACT374DWG from onsemi provide functional equivalence with 160 MHz clock frequency and 10ns propagation delay. Both maintain the required output drive and supply specifications. MC74ACT374DWR2G is available in Tape & Reel packaging with Active status. MC74ACT374DWG is available in Tube packaging with Active status. Both achieve ROHS3 compliance but carry MSL 3 rating, requiring controlled storage conditions.

Extended Temperature Range Alternative:

CD74ACT374M96 from Texas Instruments extends the operating temperature range to -55°C ~ 125°C, suitable for applications requiring wider temperature performance. This part maintains functional equivalence with 110 MHz clock frequency and 11.2ns propagation delay. It is ROHS3 compliant with MSL 1 rating and Active product status.

Package Variant:

SN74ACT374NSR from Texas Instruments provides functional equivalence in a narrower 20-SOIC package (0.209", 5.30mm width) compared to the standard 0.295" width. This part is suitable only if PCB layout accommodates the narrower package footprint. It maintains 160 MHz clock frequency, 10ns propagation delay, ROHS3 compliance, and Active product status.

Obsolete Part Consideration:

CD74ACT374M from Harris Corporation is classified as obsolete and should be avoided for new designs despite functional equivalence. This part is not ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can I use SN74ACT374NSR as a direct replacement for 74ACTQ374SCX?

A: SN74ACT374NSR is functionally equivalent but uses a narrower 20-SOIC package (0.209" width versus 0.295" width). Direct PCB substitution is not possible without layout modification. Verify PCB footprint compatibility before selection.

Q: What is the difference between MC74ACT374DWG and MC74ACT374DWR2G?

A: Both parts are functionally identical with identical electrical specifications. The difference is packaging: MC74ACT374DWG is supplied in Tube packaging, while MC74ACT374DWR2G is supplied in Tape & Reel (TR) format. Selection depends on procurement and assembly requirements.

Q: Why do substitute parts show lower quiescent current than the original 74ACTQ374SCX?

A: The substitute parts (SN74ACT374DW, SN74ACT374DWR, SN74ACT374NSR) feature 4 µA quiescent current compared to the original 40 µA. This represents improved power efficiency in newer manufacturing processes and is a beneficial characteristic. Lower quiescent current does not affect functional compatibility.

Q: Is the 74ACTQ374SCX still available for procurement?

A: The 74ACTQ374SCX is classified as obsolete. While inventory may exist (4478 Pcs reported), procurement from new stock is not recommended. Active substitute parts such as SN74ACT374DWR or MC74ACT374DWR2G should be specified for new designs and ongoing production.

Q: What does MSL 1 versus MSL 3 mean for component handling?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life with standard moisture control. MSL 3 requires controlled storage conditions with a maximum floor life of 168 hours after bag opening. Parts with MSL 1 rating (SN74ACT374DWR, SN74ACT374DW, SN74ACT374NSR, CD74ACT374M96) offer simpler handling and storage requirements compared to MSL 3 parts (MC74ACT374DWR2G, MC74ACT374DWG).

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts are ROHS3 compliant. The original 74ACTQ374SCX does not specify RoHS status. For applications requiring RoHS compliance certification, any of the listed active substitute parts satisfy this requirement.

Q: Can I use CD74ACT374M96 in applications requiring extended temperature operation?

A: Yes. CD74ACT374M96 operates across -55°C ~ 125°C, extending the temperature range beyond the original 74ACTQ374SCX specification (-40°C ~ 85°C). This part is suitable for industrial and automotive applications requiring wider temperature performance while maintaining all other functional specifications.