74AC125SC Equivalent & Substitute Parts

Part Overview

The 74AC125SC is a non-inverting buffer IC with 4 elements, 1 bit per element, and 3-state output capability. Manufactured by onsemi in 14-SOIC surface mount packaging, this component operates across a 2V to 6V supply voltage range with ±24mA output current capability. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design requirements and production continuity.

Substiute Parts

74AC125SC

onsemiIn Stock: 122374AC125SC Datasheet

Current PartRFQ

MC74AC125DR2G

onsemiIn Stock: 1506MC74AC125DR2G Datasheet

SimilarRFQ

MC74AC125DG

onsemiIn Stock: 1377MC74AC125DG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74AC125SC are qualified based on the following critical parameters that must remain identical:

• Logic Type: Buffer, Non-Inverting
• Number of Elements: 4
• Number of Bits per Element: 1
• Output Type: 3-State
• Current - Output High, Low: 24mA, 24mA
• Voltage - Supply: 2V ~ 6V
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Series: 74AC

The substitute parts MC74AC125DR2G and MC74AC125DG meet all electrical and mechanical parameters required for direct substitution. Differences exist only in packaging format (Tape & Reel versus Tube) and product status (Active versus Obsolete), with no impact on functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both MC74AC125DR2G and MC74AC125DG are direct functional equivalents to the 74AC125SC. Selection between these substitutes depends on procurement and assembly requirements:

MC74AC125DR2G is supplied in Tape & Reel format and carries Active product status with ROHS3 compliance certification. This variant is suitable for high-volume automated assembly operations.

MC74AC125DG is supplied in Tube packaging and also carries Active product status with ROHS3 compliance certification. This variant is suitable for lower-volume applications or manual assembly processes.

Both substitutes maintain identical electrical performance, thermal characteristics, and mechanical compatibility with the original 74AC125SC design. The choice between them is determined by packaging logistics and assembly methodology rather than technical performance.

Frequently Asked Questions (FAQ)

Q: Can MC74AC125DR2G and MC74AC125DG be used interchangeably with 74AC125SC?

A: Yes. Both substitutes are electrically and mechanically identical to the 74AC125SC. They provide the same logic function, output current capability, supply voltage range, and operating temperature specifications. The only differences are packaging format and product status.

Q: What is the difference between Tape & Reel and Tube packaging?

A: Tape & Reel packaging (MC74AC125DR2G) is designed for automated pick-and-place assembly equipment and is typically used in high-volume production. Tube packaging (MC74AC125DG) is designed for manual handling and lower-volume applications. Both contain the same component with identical electrical specifications.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both MC74AC125DR2G and MC74AC125DG are ROHS3 compliant. The original 74AC125SC does not specify RoHS status.

Q: Do the substitute parts have the same moisture sensitivity rating?

A: Yes. All three parts, including the original 74AC125SC, have Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: Why is the original 74AC125SC marked as obsolete?

A: The 74AC125SC is classified as obsolete by the manufacturer. The active equivalents MC74AC125DR2G and MC74AC125DG are recommended for new designs and ongoing production requirements.

Q: Will the substitute parts fit the same PCB footprint?

A: Yes. All three parts use the 14-SOIC (0.154", 3.90mm Width) package with surface mount mounting type, ensuring identical PCB footprint compatibility.