MC74ACT374N Equivalent & Substitute Parts

Part Overview

The MC74ACT374N is a D-Type flip-flop logic integrated circuit featuring 1 element with 8-bit capacity and positive edge triggering. Manufactured by onsemi in a 20-DIP through-hole package, this component operates at a maximum clock frequency of 160 MHz with 10ns propagation delay at 5V and 50pF load. The part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements where original stock becomes unavailable.

Substiute Parts

MC74ACT374N

onsemiIn Stock: 5663MC74ACT374N Datasheet

Current PartRFQ

CD74ACT374E

Harris CorporationIn Stock: 1825CD74ACT374E Datasheet

SimilarRFQ

SN74ACT374N

Texas InstrumentsIn Stock: 1130SN74ACT374N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MC74ACT374N are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Functional Parameters:

• Type: D-Type flip-flop architecture
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: Tri-State, Non-Inverted
• Trigger Type: Positive Edge
• Voltage Supply Range: 4.5V ~ 5.5V
• Package / Case: 20-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

Performance Parameters:

• Clock Frequency: minimum 110 MHz
• Max Propagation Delay: maximum 11.2ns @ 5V, 50pF
• Current Output High/Low: 24mA / 24mA
• Operating Temperature Range: compatible with -40°C ~ 85°C minimum

Substitute parts CD74ACT374E and SN74ACT374N meet these criteria and are therefore qualified as equivalent alternatives to the MC74ACT374N.

Parameter Comparison

Engineering Selection Recommendations

SN74ACT374N (Texas Instruments) is the preferred substitute for new designs and production applications. This part maintains identical functional and performance specifications to the MC74ACT374N while offering active product status and ROHS3 compliance. The lower quiescent current (4 µA versus 8 µA) provides additional power efficiency benefits. Texas Instruments' active status ensures long-term availability and supply chain stability.

CD74ACT374E (Harris Corporation) is a functional equivalent suitable for applications where the MC74ACT374N specifications are required. This part meets all critical electrical and mechanical parameters. However, the obsolete product status and RoHS non-compliance status should be considered for new design implementations. The slightly higher propagation delay (11.2ns versus 10ns) and input capacitance (10 pF versus 4.5 pF) remain within acceptable operational margins for most 74ACT logic applications.

Both substitute parts are pin-compatible and functionally interchangeable with the MC74ACT374N in 20-DIP through-hole circuit implementations.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT374N replace MC74ACT374N directly? A: Yes. The SN74ACT374N is a direct functional and pin-compatible replacement. Both parts share identical D-Type flip-flop architecture, 8-bit configuration, tri-state output, positive edge triggering, 160 MHz clock frequency, 10ns propagation delay, and 20-DIP through-hole packaging.

Q: What are the differences between CD74ACT374E and SN74ACT374N? A: The CD74ACT374E operates at 110 MHz maximum clock frequency with 11.2ns propagation delay, compared to 160 MHz and 10ns for the SN74ACT374N. The CD74ACT374E has higher input capacitance (10 pF versus 4.5 pF) and operates across a wider temperature range (-55°C ~ 125°C versus -40°C ~ 85°C). Both are functionally equivalent for standard 74ACT logic applications.

Q: Is the 20-DIP package identical across all three parts? A: Yes. All three parts use the 20-DIP (0.300", 7.62mm) through-hole package with identical pin configuration and mechanical dimensions, ensuring direct board-level compatibility.

Q: What is the significance of product status (Active vs. Obsolete)? A: Active product status indicates ongoing manufacturer support, continued production, and long-term availability. Obsolete status indicates the part is no longer manufactured. For new designs, selecting an active substitute such as SN74ACT374N ensures supply chain continuity and future availability.

Q: Does RoHS compliance affect substitution decisions? A: RoHS compliance status reflects environmental and regulatory requirements. The SN74ACT374N is ROHS3 compliant, while MC74ACT374N and CD74ACT374E are RoHS non-compliant. For applications subject to RoHS regulations, SN74ACT374N is the appropriate selection.

Q: Are there any performance trade-offs when using CD74ACT374E? A: The CD74ACT374E operates at lower maximum clock frequency (110 MHz versus 160 MHz) and has slightly higher propagation delay (11.2ns versus 10ns). These differences are acceptable for most standard logic applications but should be verified against specific circuit timing requirements.