74ABT374CSC D-Type Flip-Flop Logic IC Equivalent & Substitute Parts

Part Overview

The 74ABT374CSC is a single-element, 8-bit D-type flip-flop logic integrated circuit manufactured by onsemi in a 20-SOIC surface mount package. This component functions as a standard positive edge-triggered flip-flop with tri-state, non-inverted outputs, operating at clock frequencies up to 200 MHz with a maximum propagation delay of 5 ns at 5V and 50 pF load. The part is currently listed as obsolete, making equivalent substitute components necessary for ongoing production and maintenance applications. Substitute parts must maintain functional equivalence through matching package type, pin configuration, electrical performance characteristics, and operating specifications.

Substiute Parts

74ABT374CSC

onsemiIn Stock: 282574ABT374CSC Datasheet

Current PartRFQ

74FCT374CTSOG

IDT, Integrated Device Technology IncIn Stock: 189774FCT374CTSOG Datasheet

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CY74FCT374ATSOC

Texas InstrumentsIn Stock: 1638CY74FCT374ATSOC Datasheet

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SN74ABT374ADW

Texas InstrumentsIn Stock: 1053SN74ABT374ADW Datasheet

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SN74ABT374ADWR

Texas InstrumentsIn Stock: 4917SN74ABT374ADWR Datasheet

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SN74LS374DWR

Texas InstrumentsIn Stock: 2071SN74LS374DWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ABT374CSC are qualified based on the following criteria:

Mandatory Matching Parameters:

• Package type: 20-SOIC (0.295", 7.50mm Width)
• Function: D-Type flip-flop, 1 element, 8-bit configuration
• Output type: Tri-state, non-inverted
• Trigger type: Positive edge
• Mounting type: Surface mount
• Operating temperature range: -40°C to 85°C minimum

Performance Parameters (within acceptable tolerance):

• Clock frequency: 200 MHz or higher
• Maximum propagation delay: 5 ns or lower at 5V, 50 pF load
• Voltage supply range: 4.5V to 5.5V or compatible subset
• Output current capability: 32 mA (high), 64 mA (low) or equivalent

Substitute parts are grouped into two categories: direct series equivalents (74ABT series) and compatible alternative series (74FCT and 74LS series) that meet functional and electrical requirements while maintaining pin-for-pin compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (74ABT Series): SN74ABT374ADW and SN74ABT374ADWR are the preferred substitutes. Both are manufactured by Texas Instruments, maintain the 74ABT series designation, and provide identical electrical performance to the 74ABT374CSC with 200 MHz clock frequency and 5.1 ns propagation delay. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity level. The ADWR variant is supplied in Tape & Reel packaging with higher inventory availability (4839 pcs), while the ADW variant is supplied in Tube packaging (993 pcs).

Secondary Substitutes (74FCT Series): 74FCT374CTSOG (IDT) and CY74FCT374ATSOC (Texas Instruments) are compatible alternatives within the 74FCT logic family. Both maintain the 20-SOIC package and tri-state output configuration. The 74FCT374CTSOG offers lower quiescent current (1 mA) and slightly higher propagation delay (5.2 ns). The CY74FCT374ATSOC provides matching output current specifications (32 mA / 64 mA) but with increased propagation delay (6.5 ns) and higher quiescent current (200 µA). Both are active products with ROHS3 compliance.

Alternative Substitute (74LS Series): SN74LS374DWR is a compatible substitute with reduced performance specifications. This part operates at 50 MHz clock frequency with 28 ns propagation delay, significantly lower than the main part. Output current capability is reduced (2.6 mA / 24 mA), and quiescent current is substantially higher (40 mA). Operating temperature range is limited to 0°C to 70°C. This substitute is suitable only for applications where performance requirements are less stringent than the original specification.

Compliance and Availability: All active substitute parts carry ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). The 74ABT series substitutes are recommended for direct replacement in applications requiring equivalent performance. The 74FCT series offers alternative sourcing with acceptable performance trade-offs. The 74LS series should be selected only when performance reduction is acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT374ADW and SN74ABT374ADWR be used interchangeably with 74ABT374CSC?

A: Yes. Both parts are functionally equivalent with identical electrical specifications, including 200 MHz clock frequency, 5.1 ns propagation delay, and 32 mA / 64 mA output current. The primary difference is packaging format: ADW is supplied in Tube, while ADWR is supplied in Tape & Reel. Pin configuration and performance characteristics are identical.

Q: What is the difference between 74FCT374CTSOG and CY74FCT374ATSOC?

A: Both are 74FCT series parts in 20-SOIC packages with positive edge triggering and tri-state outputs. The 74FCT374CTSOG has lower quiescent current (1 mA vs. 200 µA) and slightly better propagation delay (5.2 ns vs. 6.5 ns). The CY74FCT374ATSOC matches the output current specifications of the main part (32 mA / 64 mA vs. 15 mA / 48 mA). Selection depends on whether power consumption or output drive capability is the priority.

Q: Is SN74LS374DWR a suitable replacement for 74ABT374CSC?

A: SN74LS374DWR maintains package compatibility and basic functional equivalence but with significantly reduced performance. Clock frequency is limited to 50 MHz (vs. 200 MHz), propagation delay is 28 ns (vs. 5 ns), and output current is reduced to 2.6 mA / 24 mA (vs. 32 mA / 64 mA). Operating temperature range is also narrower (0°C to 70°C vs. -40°C to 85°C). This part is suitable only for legacy applications or where performance requirements are substantially lower.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts (74FCT374CTSOG, CY74FCT374ATSOC, SN74ABT374ADW, SN74ABT374ADWR, and SN74LS374DWR) are ROHS3 compliant. The main part (74ABT374CSC) does not specify RoHS status due to its obsolete status.

Q: What is the significance of the 20-SOIC package specification?

A: The 20-SOIC (Small Outline Integrated Circuit) package with 0.295" width and 7.50 mm width is the physical form factor. All listed substitutes use this identical package, ensuring pin-for-pin compatibility and direct board-level replacement without layout modifications.

Q: Which substitute offers the best power efficiency?

A: 74FCT374CTSOG offers the lowest quiescent current at 1 mA, compared to 50 µA for the main part and 250 µA for the 74ABT series substitutes. However, this advantage must be weighed against slightly higher propagation delay (5.2 ns) and reduced output current capability (15 mA / 48 mA).