SN74ACT14D Equivalent & Substitute Parts

Part Overview

The SN74ACT14D is a 6-channel inverter IC with Schmitt trigger inputs in a 14-SOIC surface mount package, manufactured by Texas Instruments. This logic component is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates within the 4.5V to 5.5V supply voltage range and is suitable for applications requiring noise-immune logic inversion with defined input thresholds.

Substiute Parts

SN74ACT14D

Texas InstrumentsIn Stock: 1629SN74ACT14D Datasheet

Current PartRFQ

SN74ACT14DR

Texas InstrumentsIn Stock: 1236SN74ACT14DR Datasheet

DirectRFQ

MC74ACT14DR2G

onsemiIn Stock: 235146MC74ACT14DR2G Datasheet

DirectRFQ

74ACT14SCX

onsemiIn Stock: 1179574ACT14SCX Datasheet

MFR RecommendedRFQ

MC74ACT14DG

onsemiIn Stock: 2051MC74ACT14DG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ACT14D is determined by strict equivalence across the following critical parameters:

• Logic Type: Inverter with 6 channels and 1 input per channel
• Schmitt Trigger feature for noise immunity
• Supply voltage range: 4.5V ~ 5.5V
• Package: 14-SOIC surface mount form factor
• Operating temperature range: -40°C ~ 85°C
• RoHS3 compliance and MSL Level 1 rating

Substitute parts must maintain identical functional specifications and pinout compatibility. Variations in quiescent current (2 µA to 4 µA) and input logic level thresholds are within acceptable tolerance for this product category. Propagation delay differences up to 1.5ns are acceptable for general logic applications. Packaging format (Tube vs. Cut Tape & Digi-Reel) does not affect electrical equivalence but may impact procurement and handling requirements.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the SN74ACT14D and maintain full electrical and mechanical compatibility. Selection should be based on the following criteria:

Active Product Status: SN74ACT14DR, MC74ACT14DR2G, 74ACT14SCX, and MC74ACT14DG are all active products with ongoing manufacturer support, ensuring long-term availability and supply chain stability compared to the discontinued SN74ACT14D.

Manufacturer Continuity: SN74ACT14DR from Texas Instruments provides direct manufacturer continuity for designs originally specified with the SN74ACT14D. This option minimizes design documentation changes and maintains original manufacturer specifications.

Inventory Availability: MC74ACT14DR2G offers the highest inventory level (235,100 pcs), providing immediate procurement advantage for high-volume applications. 74ACT14SCX and MC74ACT14DG also maintain substantial stock levels.

Packaging Format Compatibility: SN74ACT14DR and 74ACT14SCX are available in Cut Tape & Digi-Reel format, suitable for automated assembly. MC74ACT14DG is available in Tube format, matching the original SN74ACT14D packaging for manual or semi-automated processes.

Compliance Certification: All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring regulatory and environmental compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SN74ACT14D with SN74ACT14DR in my existing design?

A: Yes. SN74ACT14DR is a direct functional equivalent from the same manufacturer (Texas Instruments) with identical electrical specifications, pinout, and package. The primary difference is packaging format (Cut Tape & Digi-Reel vs. Tube) and active product status.

Q: What is the difference between the Texas Instruments and onsemi substitute parts?

A: Both manufacturers produce 74ACT14 logic inverters that meet the same functional specifications and 14-SOIC package standard. Texas Instruments (SN74ACT14DR) provides direct manufacturer continuity. onsemi parts (MC74ACT14DR2G, 74ACT14SCX, MC74ACT14DG) are cross-manufacturer equivalents with identical electrical performance and pinout compatibility.

Q: Are there differences in quiescent current between substitute parts?

A: Yes. SN74ACT14D, SN74ACT14DR, and 74ACT14SCX specify 2 µA maximum quiescent current. MC74ACT14DR2G and MC74ACT14DG specify 4 µA maximum. Both values are acceptable for this product category and do not affect functional compatibility. Select based on power consumption requirements for your specific application.

Q: Does propagation delay variation affect compatibility?

A: 74ACT14SCX specifies 10ns propagation delay compared to 11.5ns for other parts. This 1.5ns difference is within acceptable tolerance for general logic applications. Select based on timing-critical requirements in your specific circuit design.

Q: What packaging format should I choose?

A: SN74ACT14D and MC74ACT14DG are supplied in Tube format, suitable for manual or semi-automated assembly. SN74ACT14DR and 74ACT14SCX are supplied in Cut Tape & Digi-Reel format, optimized for automated pick-and-place assembly. Select based on your manufacturing process requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL Level 1 rating, meeting current environmental and regulatory requirements for electronic component procurement.

Q: Which substitute part offers the best inventory availability?

A: MC74ACT14DR2G offers the highest inventory level at 235,100 pcs, providing immediate availability for high-volume production. 74ACT14SCX (11,774 pcs) and MC74ACT14DG (2,038 pcs) also maintain substantial stock levels.