74ABT377CSCX Equivalent & Substitute Parts

Part Overview

The 74ABT377CSCX is an octal D-type flip-flop logic integrated circuit manufactured by onsemi, housed in a 20-SOIC surface mount package. This device functions as a standard 8-bit positive edge-triggered flip-flop with non-inverted outputs. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for design continuity and procurement planning.

Substiute Parts

74ABT377CSCX

onsemiIn Stock: 70174ABT377CSCX Datasheet

Current PartRFQ

SN74ABT377ADW

Texas InstrumentsIn Stock: 1271SN74ABT377ADW Datasheet

DirectRFQ

SN74ABT377ADWR

Texas InstrumentsIn Stock: 2395SN74ABT377ADWR Datasheet

DirectRFQ

SN74LS377DW

Texas InstrumentsIn Stock: 6633SN74LS377DW Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ABT377CSCX is determined by the following critical parameters:

• Package compatibility: 20-SOIC (0.295", 7.50mm Width) surface mount
• Functional equivalence: 8-bit D-type flip-flop with positive edge triggering
• Electrical interface: 4.5V to 5.5V supply voltage operation
• Output configuration: Non-inverted outputs
• Temperature range: -40°C to 85°C operating specification

Substitute parts are categorized into two groups:

Direct Substitutes (74ABT Series): SN74ABT377ADW and SN74ABT377ADWR maintain identical functional specifications, package geometry, and electrical characteristics within the same logic family. These parts are manufactured by Texas Instruments and carry active product status.

Similar Substitute (74LS Series): SN74LS377DW operates within the same package and functional category but belongs to the 74LS logic family, which exhibits different electrical performance characteristics and is included for applications where legacy compatibility or specific performance trade-offs are acceptable.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes: SN74ABT377ADW and SN74ABT377ADWR are the preferred alternatives to the obsolete 74ABT377CSCX. Both parts are manufactured by Texas Instruments with active product status and ROHS3 compliance certification. These devices maintain electrical and functional parity with the original part across all critical parameters including clock frequency, propagation delay, output current ratings, and supply voltage range. The distinction between these two options is packaging format: SN74ABT377ADW is supplied in tube packaging, while SN74ABT377ADWR is supplied in tape and reel format for automated assembly operations.

Secondary Substitute: SN74LS377DW represents a functional alternative within the same package geometry but with reduced performance specifications. This part operates at lower clock frequencies (40 MHz versus 200 MHz), exhibits longer propagation delays (27ns versus 6.8ns), and draws significantly higher quiescent current (18 mA versus 50 µA). The operating temperature range is also restricted to 0°C to 70°C. Selection of this part is appropriate only for applications where the reduced performance envelope is acceptable and legacy 74LS compatibility is required.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT377ADW directly replace the 74ABT377CSCX without circuit modifications?

A: Yes. The SN74ABT377ADW maintains identical functional specifications, package geometry, and electrical interface characteristics. No circuit modifications are required for direct substitution.

Q: What is the difference between SN74ABT377ADW and SN74ABT377ADWR?

A: Both parts are electrically and functionally identical. The difference is packaging format: SN74ABT377ADW is supplied in tube packaging for manual handling, while SN74ABT377ADWR is supplied in tape and reel format optimized for automated pick-and-place assembly.

Q: Why does SN74LS377DW have different electrical specifications?

A: SN74LS377DW belongs to the 74LS logic family, which uses different semiconductor process technology than the 74ABT family. This results in lower clock frequency capability (40 MHz), longer propagation delays, and higher power consumption. The 20-SOIC package and 8-bit D-type flip-flop function remain identical.

Q: Is the 74ABT377CSCX still available for purchase?

A: The 74ABT377CSCX is classified as obsolete. Existing inventory may be available through component distributors, but new production has ceased. Texas Instruments SN74ABT377ADW and SN74ABT377ADWR are active products with ongoing availability.

Q: What compliance certifications apply to the substitute parts?

A: SN74ABT377ADW and SN74ABT377ADWR both carry ROHS3 compliance certification. All substitute parts listed maintain REACH unaffected status and EAR99 export classification consistent with the original part.

Q: Can SN74LS377DW be used in high-speed applications originally designed for 74ABT377CSCX?

A: No. The 74LS family maximum clock frequency of 40 MHz and propagation delay of 27ns are insufficient for applications requiring the 200 MHz clock frequency and 6.8ns propagation delay of the 74ABT family. Functional operation may occur at reduced clock speeds, but performance specifications cannot be guaranteed.