74ACT14PC Equivalent & Substitute Parts

Part Overview

The 74ACT14PC is a 6-channel inverter IC with Schmitt trigger inputs manufactured by onsemi in a 14-MDIP package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The 74ACT14 logic family provides standardized inverter functionality across multiple manufacturers, enabling direct substitution based on electrical and mechanical compatibility.

Substiute Parts

74ACT14PC

onsemiIn Stock: 214774ACT14PC Datasheet

Current PartRFQ

SN74ACT14N

Texas InstrumentsIn Stock: 3496SN74ACT14N Datasheet

DirectRFQ

CD74ACT14E

Harris CorporationIn Stock: 2300CD74ACT14E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT14PC is determined by the following criteria:

Electrical Compatibility Requirements:

• Logic type: Inverter with 6 channels, 1 input per channel
• Schmitt trigger functionality
• Supply voltage range: 4.5V ~ 5.5V
• Output current capability: 24mA minimum for both high and low states
• Base product number: 74ACT14 series

Mechanical Compatibility Requirements:

• Package type: 14-DIP (0.300", 7.62mm)
• Mounting type: Through Hole
• Pin count and spacing must match 14-DIP standard

Acceptable Variations:

• Manufacturer identity (onsemi, Texas Instruments, Harris Corporation)
• Product status (Active or Obsolete)
• Packaging format (Tube, standard)
• Quiescent current (within specified maximums)
• Propagation delay (within specified maximums)
• Input logic level thresholds (within specified ranges)
• Operating temperature range (equal to or wider than -40°C ~ 85°C)

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SN74ACT14N (Texas Instruments)

The SN74ACT14N is the recommended substitute for the 74ACT14PC. This part maintains identical electrical specifications within the 74ACT14 series and is currently in Active product status, ensuring long-term availability. The SN74ACT14N carries ROHS3 compliance, meeting modern regulatory requirements. Propagation delay of 11.5ns at 5V with 50pF load remains within acceptable performance parameters for standard logic applications. The 14-PDIP package is mechanically and electrically compatible with the original 14-MDIP specification.

Secondary Substitute: CD74ACT14E (Harris Corporation)

The CD74ACT14E provides functional equivalence with extended operating temperature range (-55°C ~ 125°C), suitable for applications requiring wider temperature performance. However, this part is classified as Obsolete and does not meet RoHS compliance requirements. The propagation delay of 14.5ns is acceptable but represents the maximum within the substitute group. Selection of this part should be limited to legacy system maintenance where temperature range requirements justify the trade-offs.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT14N directly replace the 74ACT14PC without PCB modifications?

A: Yes. Both parts use the 14-DIP package with identical pin spacing (0.300", 7.62mm) and through-hole mounting. No PCB layout changes are required for mechanical or electrical compatibility.

Q: What are the key electrical differences between these substitutes?

A: All three parts meet the core 74ACT14 specification: 6-channel inverter with Schmitt trigger, 4.5V ~ 5.5V supply, and 24mA output current. Differences exist in quiescent current (2µA vs. 4µA for CD74ACT14E) and propagation delay (10ns to 14.5ns). These variations remain within acceptable tolerances for standard logic applications.

Q: Why is the SN74ACT14N preferred over the CD74ACT14E?

A: The SN74ACT14N is in Active product status, ensuring continued availability and manufacturing support. It also meets ROHS3 compliance, aligning with current environmental and regulatory standards. The CD74ACT14E, while functionally equivalent, is Obsolete and non-compliant with RoHS requirements.

Q: Are there input logic level differences that affect circuit design?

A: Input logic level thresholds vary slightly between manufacturers. The 74ACT14PC specifies 0.8V (low) and 2V (high), while the SN74ACT14N specifies 0.5V ~ 1.4V (low) and 1.2V ~ 2.1V (high). These ranges overlap sufficiently for standard TTL/CMOS interface applications. The CD74ACT14E specifies 0.8V ~ 1.3V (low) and 1.4V ~ 2V (high). All three parts are compatible with standard 5V logic signaling.

Q: What is the impact of propagation delay differences on system performance?

A: Propagation delay ranges from 10ns (74ACT14PC) to 14.5ns (CD74ACT14E) at 5V with 50pF load. For most digital logic applications operating at standard clock frequencies, this 4.5ns variation is negligible. Applications with timing-critical paths should verify that the selected substitute meets specific delay requirements.

Q: Is the extended temperature range of the CD74ACT14E necessary for my application?

A: The CD74ACT14E operates from -55°C ~ 125°C, compared to -40°C ~ 85°C for the other parts. Extended temperature range is required only for industrial, automotive, or aerospace applications with extreme environmental conditions. Standard commercial applications typically operate within the -40°C ~ 85°C range.