74HCT11N Equivalent & Substitute Parts

Part Overview

The 74HCT11N is a 3-channel AND gate logic IC in 14-DIP packaging manufactured by NXP USA Inc. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74HCT11N operates within the 74HCT logic family standard, providing three independent 3-input AND gates in a single package suitable for through-hole mounting applications.

Substiute Parts

74HCT11N,652

NXP USA Inc.In Stock: 94174HCT11N,652 Datasheet

Current PartRFQ

CD74HCT11E

Harris CorporationIn Stock: 6955CD74HCT11E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HCT11N is determined by strict adherence to the following electrical and mechanical parameters:

• Logic family and base product number (74HCT11)
• Package type and physical dimensions (14-DIP, 0.300" spacing)
• Supply voltage range (4.5V ~ 5.5V)
• Input logic levels (Low: 0.8V, High: 2V)
• Output current capability (4mA, 4mA)
• Quiescent current specification (2 µA maximum)
• Through-hole mounting compatibility

The CD74HCT11E qualifies as a direct substitute based on matching all critical electrical parameters and physical package specifications. Variations in propagation delay and operating temperature range do not disqualify substitution when the substitute meets or exceeds the minimum performance requirements of the original design.

Parameter Comparison

Engineering Selection Recommendations

The CD74HCT11E is a qualified substitute for the 74HCT11N based on electrical and mechanical parameter equivalence. Both components share identical logic functionality, pin configuration, and electrical specifications within the 74HCT logic family standard.

The CD74HCT11E offers an extended operating temperature range (-55°C to 125°C versus -40°C to 125°C), providing additional thermal margin in applications requiring lower temperature operation. The propagation delay specification of 28ns at 4.5V and 50pF load remains within acceptable timing margins for standard logic applications.

Compliance considerations: The 74HCT11N is RoHS3 compliant, while the CD74HCT11E is RoHS non-compliant. Design teams must evaluate RoHS compliance requirements for their specific application and regulatory jurisdiction before final component selection.

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT11E directly replace the 74HCT11N in existing designs?

A: Yes. Both components are pin-compatible 14-DIP packages with identical logic functionality, input/output electrical specifications, and supply voltage requirements. Direct substitution is possible from an electrical and mechanical standpoint.

Q: What is the significance of the 4ns difference in propagation delay?

A: The CD74HCT11E specifies 28ns maximum propagation delay compared to 24ns for the 74HCT11N. This 4ns difference is negligible in most standard logic applications. Design teams should evaluate timing-critical paths to confirm the substitute meets system timing requirements.

Q: Does the extended temperature range of the CD74HCT11E affect compatibility?

A: No. The CD74HCT11E operating range of -55°C to 125°C encompasses the 74HCT11N range of -40°C to 125°C. The extended lower temperature capability provides additional operational margin without affecting compatibility in designs specified for -40°C to 125°C operation.

Q: What are the packaging differences between the two parts?

A: Both components use 14-DIP through-hole packaging with identical 0.300" (7.62mm) lead spacing. The 74HCT11N is supplied in standard packaging, while the CD74HCT11E is supplied in tube packaging. Physical dimensions and pin assignments are identical.

Q: Are there compliance differences between these parts?

A: Yes. The 74HCT11N is RoHS3 compliant, while the CD74HCT11E is RoHS non-compliant. Applications subject to RoHS regulations must use the 74HCT11N or identify alternative RoHS-compliant 74HCT11 variants.