74F377SCX Equivalent & Substitute Parts

Part Overview

The 74F377SCX is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit parallel data storage capability. This component operates as a standard positive edge-triggered flip-flop in the 74F logic family, housed in a 20-SOIC surface mount package. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

74F377SCX

onsemiIn Stock: 91774F377SCX Datasheet

Current PartRFQ

SN74F377ADW

Texas InstrumentsIn Stock: 1659SN74F377ADW Datasheet

DirectRFQ

SN74F377ADWR

Texas InstrumentsIn Stock: 1109SN74F377ADWR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F377SCX are qualified based on the following electrical and mechanical parameters:

• Logic Family & Function: All substitutes must be 74F series D-Type flip-flops with 8-bit parallel storage capability
• Package Compatibility: All substitutes must use the 20-SOIC (0.295", 7.50mm Width) surface mount package
• Electrical Specifications: Supply voltage range (4.5V ~ 5.5V), output type (non-inverted), and trigger type (positive edge) must match
• Operating Temperature Range: 0°C ~ 70°C minimum requirement
• Pin Configuration: Identical pinout as the base product number 74F377

The qualified substitutes are Texas Instruments manufactured parts: SN74F377ADW and SN74F377ADWR, both sharing the same base product number 74F377 and package specification.

Parameter Comparison

Engineering Selection Recommendations

SN74F377ADWR (Texas Instruments, Active Status) is the primary recommended substitute for the obsolete 74F377SCX. This part maintains active product status with full manufacturer support, ROHS3 compliance, and identical package specifications. The SN74F377ADWR is available in Tape & Reel packaging, suitable for automated assembly processes.

SN74F377ADW (Texas Instruments, Last Time Buy Status) serves as a secondary substitute option. While functionally equivalent and ROHS3 compliant, this part carries Last Time Buy status, indicating limited future availability. This option is suitable for applications where Tube packaging is acceptable.

Both Texas Instruments substitutes exhibit slightly higher quiescent current (72 mA versus 48 mA) and marginally slower propagation delay (9ns versus 7ns) compared to the original 74F377SCX. These parameter variations remain within acceptable tolerances for standard 74F logic family applications and do not affect functional compatibility in typical digital logic circuits.

Frequently Asked Questions (FAQ)

Q: Can SN74F377ADW and SN74F377ADWR be used interchangeably with 74F377SCX?

A: Yes. Both Texas Instruments parts are direct functional equivalents sharing identical logic family classification, pin configuration, package type, and electrical operating parameters. The primary difference is packaging format: SN74F377ADW uses Tube packaging while SN74F377ADWR uses Tape & Reel packaging.

Q: What are the key differences between the substitute parts?

A: SN74F377ADW and SN74F377ADWR are electrically identical. The distinction lies in product status and packaging: SN74F377ADW is Last Time Buy status in Tube format, while SN74F377ADWR is Active status in Tape & Reel format. For new designs, SN74F377ADWR is preferred due to active manufacturer support.

Q: Are there performance implications when substituting the 74F377SCX?

A: The Texas Instruments substitutes operate within the same 74F logic family specifications. Quiescent current increases from 48 mA to 72 mA, and propagation delay increases from 7ns to 9ns. These variations are typical within the 74F family tolerance range and do not affect functional compatibility in standard digital logic applications.

Q: Is the 20-SOIC package identical across all three parts?

A: Yes. All three parts use the 20-SOIC (0.295", 7.50mm Width) surface mount package with identical pinout and mechanical dimensions, ensuring direct PCB compatibility without layout modifications.

Q: What compliance certifications apply to the substitute parts?

A: Both SN74F377ADW and SN74F377ADWR are ROHS3 compliant and REACH unaffected. Both maintain Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.