74ABT374CPC Equivalent & Substitute Parts

Part Overview

The 74ABT374CPC is a D-Type flip-flop logic integrated circuit featuring 1 element with 8-bit capacity and tri-state, non-inverted output configuration. Manufactured by onsemi in a 20-DIP through-hole package, this component operates at a clock frequency of 200 MHz with a maximum propagation delay of 5ns at 5V with 50pF load. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system maintenance and new design implementations where legacy compatibility is required.

Substiute Parts

74ABT374CPC

onsemiIn Stock: 105474ABT374CPC Datasheet

Current PartRFQ

SN74ABT374AN

Texas InstrumentsIn Stock: 3963SN74ABT374AN Datasheet

SimilarRFQ

SN74LS374N

onsemiIn Stock: 3759SN74LS374N Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ABT374CPC are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Core Functional Requirements:

• D-Type flip-flop architecture with 1 element and 8-bit configuration
• Tri-state, non-inverted output type
• Positive edge trigger mechanism
• 20-DIP through-hole package (0.300", 7.62mm)

Electrical Performance Boundaries:

• Clock frequency capability of 200 MHz or greater
• Propagation delay performance compatible with system timing requirements
• Voltage supply range overlap with 4.5V ~ 5.5V specification
• Output current drive capability (32mA high, 64mA low minimum)
• Operating temperature range encompassing -40°C ~ 85°C

Compliance and Availability:

• Active product status preferred for new applications
• Inventory availability for procurement

Two substitute parts meet these criteria: the SN74ABT374AN (Texas Instruments, active status) and the SN74LS374N (onsemi, obsolete status). Both maintain identical package geometry and functional architecture while offering different performance and compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

SN74ABT374AN (Texas Instruments) is the primary substitute for new applications and system upgrades. This part maintains identical electrical performance specifications to the 74ABT374CPC with 200 MHz clock frequency and 6.6ns propagation delay. The SN74ABT374AN holds active product status, ensuring long-term availability and supply chain stability. ROHS3 compliance satisfies modern environmental and regulatory requirements. The part is available in tube packaging with 3880 units in stock.

SN74LS374N (onsemi) serves as a secondary substitute for legacy system maintenance where the original 74ABT374CPC is unavailable. This part shares identical package geometry and functional architecture but operates at reduced performance specifications: 50 MHz clock frequency and 28ns propagation delay. The SN74LS374N exhibits lower output current drive capability (2.6mA/24mA versus 32mA/64mA) and narrower operating temperature range (0°C ~ 70°C). This part is obsolete and RoHS non-compliant, making it suitable only for direct replacement in existing systems where performance degradation is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the SN74ABT374AN directly replace the 74ABT374CPC in all applications?

A: Yes, the SN74ABT374AN provides direct functional and electrical compatibility. Both parts feature identical 20-DIP package geometry, 200 MHz clock frequency, tri-state non-inverted output configuration, and 8-bit D-Type flip-flop architecture. The SN74ABT374AN exhibits slightly higher propagation delay (6.6ns versus 5ns) and quiescent current (250 µA versus 50 µA), which remain within acceptable margins for most system designs. The SN74ABT374AN is preferred for new designs due to active product status and ROHS3 compliance.

Q: What are the limitations of using SN74LS374N as a substitute?

A: The SN74LS374N operates at significantly reduced performance specifications. Clock frequency is limited to 50 MHz compared to 200 MHz for the 74ABT374CPC, and propagation delay increases to 28ns. Output current drive capability is substantially lower (2.6mA/24mA versus 32mA/64mA), which may limit fan-out capability in high-current applications. Operating temperature range is restricted to 0°C ~ 70°C, excluding low-temperature operation below 0°C. The SN74LS374N is suitable only for legacy system maintenance where performance reduction is acceptable.

Q: Are there package compatibility concerns when substituting these parts?

A: No package compatibility concerns exist. All three parts—74ABT374CPC, SN74ABT374AN, and SN74LS374N—utilize identical 20-DIP (0.300", 7.62mm) through-hole packaging with matching pin configurations. Direct socket substitution is mechanically feasible without PCB modification.

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

A: Product status indicates manufacturer support and supply availability. The SN74ABT374AN maintains active status, ensuring continued manufacturing, technical support, and long-term procurement availability. The 74ABT374CPC and SN74LS374N are obsolete, indicating discontinued manufacturing and limited remaining inventory. For new designs, active-status parts are strongly preferred to avoid future supply chain disruption.

Q: How do quiescent current differences affect system design?

A: Quiescent current (Iq) represents power consumption during idle operation. The 74ABT374CPC draws 50 µA, the SN74ABT374AN draws 250 µA, and the SN74LS374N draws 40 mA. In battery-powered or low-power applications, the SN74LS374N's significantly higher quiescent current may impact system runtime. The SN74ABT374AN's moderate increase (250 µA) is typically negligible in standard powered applications but should be evaluated in power-sensitive designs.