74ABT377CSJX Equivalent & Substitute Parts

Part Overview

The 74ABT377CSJX is an octal D-type flip-flop logic integrated circuit manufactured by onsemi, designed for 8-bit parallel data storage with positive edge triggering. This device operates at a clock frequency of 200 MHz with a maximum propagation delay of 6.8 ns at 5V with 50 pF load. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Substitute parts maintain functional compatibility while offering active product status and improved availability.

Substiute Parts

74ABT377CSJX

onsemiIn Stock: 75774ABT377CSJX Datasheet

Current PartRFQ

SN74ABT377ANS

Texas InstrumentsIn Stock: 2276SN74ABT377ANS Datasheet

DirectRFQ

SN74ABT377ANSR

Texas InstrumentsIn Stock: 3000SN74ABT377ANSR Datasheet

DirectRFQ

SN74ABT377ADW

Texas InstrumentsIn Stock: 1271SN74ABT377ADW Datasheet

SimilarRFQ

SN74ABT377ADWR

Texas InstrumentsIn Stock: 2395SN74ABT377ADWR Datasheet

SimilarRFQ

SN74LS377DW

Texas InstrumentsIn Stock: 6633SN74LS377DW Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ABT377CSJX is determined by the following critical parameters:

Core Functional Parameters:

• Type: D-Type Flip-Flop
• Number of Bits per Element: 8
• Trigger Type: Positive Edge
• Output Type: Non-Inverted
• Package/Case: 20-SOIC form factor
• Voltage Supply Range: 4.5V ~ 5.5V
• Operating Temperature Range: -40°C ~ 85°C

Performance Parameters:

• Max Propagation Delay @ 5V, 50pF: 6.8 ns (maximum allowable)
• Clock Frequency: 150 MHz minimum (meets or exceeds functional requirements)
• Output Current Capability: 32 mA (High) / 64 mA (Low) minimum

Substitute parts are classified into two categories:

Direct Substitutes (74ABT Series): SN74ABT377ANS, SN74ABT377ANSR, SN74ABT377ADW, and SN74ABT377ADWR maintain identical functional specifications, propagation delay, and electrical characteristics. These parts differ only in packaging format (Tube, Tape & Reel) and quiescent current specifications, which do not affect functional compatibility.

Similar Substitute (74LS Series): SN74LS377DW operates within the same 20-SOIC package and voltage supply range but represents a different logic family with reduced performance specifications. This part is suitable only when clock frequency and propagation delay requirements are relaxed.

Parameter Comparison

Engineering Selection Recommendations

For Direct Functional Replacement:

SN74ABT377ANS, SN74ABT377ANSR, SN74ABT377ADW, and SN74ABT377ADWR are the primary substitutes for 74ABT377CSJX. All four parts are manufactured by Texas Instruments with active product status and ROHS3 compliance. These parts maintain identical propagation delay (6.8 ns) and output current specifications, ensuring drop-in compatibility in existing circuit designs.

Selection between these four parts depends on packaging and delivery requirements:

• SN74ABT377ANS: Standard packaging format
• SN74ABT377ANSR: Tape & Reel packaging for automated assembly
• SN74ABT377ADW: Tube packaging with wider SOIC body (0.295", 7.50mm)
• SN74ABT377ADWR: Tape & Reel packaging with wider SOIC body (0.295", 7.50mm)

For Performance-Relaxed Applications:

SN74LS377DW is suitable only when system requirements permit reduced clock frequency (40 MHz maximum) and increased propagation delay (27 ns). This part operates within a narrower voltage supply range (4.75V ~ 5.25V) and offers significantly lower output current capability (400 µA / 8 mA). Operating temperature range is also limited to 0°C ~ 70°C. Use this part only when legacy 74LS logic family integration is required or when performance specifications are not critical.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT377ANS directly replace 74ABT377CSJX without circuit modification?

A: Yes. SN74ABT377ANS maintains identical electrical specifications including propagation delay (6.8 ns), output current (32 mA / 64 mA), and voltage supply range (4.5V ~ 5.5V). Both parts are 20-SOIC packages with the same pinout and functional behavior. No circuit modifications are required.

Q: What is the difference between SN74ABT377ANS and SN74ABT377ANSR?

A: Both parts are electrically identical. The difference is packaging format: SN74ABT377ANS uses standard tube packaging, while SN74ABT377ANSR uses Tape & Reel (TR) packaging for automated pick-and-place assembly. Select based on manufacturing process requirements.

Q: Why do SN74ABT377ADW and SN74ABT377ADWR have a different package width (0.295" vs 0.209")?

A: Both parts use 20-SOIC package type but with different body widths. The wider body (0.295", 7.50mm) accommodates different PCB layout requirements. Electrical specifications remain identical. Verify PCB footprint compatibility before selection.

Q: Can SN74LS377DW be used as a substitute for 74ABT377CSJX?

A: SN74LS377DW is functionally compatible but with significant performance degradation. Clock frequency is limited to 40 MHz (versus 200 MHz for 74ABT377CSJX), and propagation delay increases to 27 ns (versus 6.8 ns). Output current capability is also reduced to 400 µA / 8 mA. Use only when system timing requirements are relaxed and legacy 74LS logic family integration is necessary.

Q: What is the operating temperature range difference between 74ABT377CSJX and SN74LS377DW?

A: 74ABT377CSJX operates from -40°C to 85°C, while SN74LS377DW operates from 0°C to 70°C. If your application requires operation below 0°C or above 70°C, SN74LS377DW is not suitable. Use one of the 74ABT series substitutes instead.

Q: Are all substitute parts RoHS compliant?

A: SN74ABT377ANS, SN74ABT377ANSR, SN74ABT377ADW, and SN74ABT377ADWR are ROHS3 compliant. SN74LS377DW RoHS status is not specified in available documentation. Verify compliance requirements with your procurement department before final selection.

Q: What is the quiescent current difference between substitute parts?

A: SN74ABT377ANS specifies 30 mA quiescent current, while SN74ABT377ANSR, SN74ABT377ADW, and SN74ABT377ADWR specify 250 µA. For low-power applications, SN74ABT377ANS is preferred. For standard applications, the difference is negligible.