74HC93N,112 Binary Counter IC – Equivalent & Substitute Parts

Part Overview

The 74HC93N,112 is a 4-bit binary counter IC manufactured by NXP USA Inc., designed for digital logic applications requiring asynchronous reset and negative edge triggering. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The 74HC series represents a standard logic family widely used in digital systems where reliable counting functionality is required across industrial and commercial temperature ranges.

Substiute Parts

74HC93N,112

NXP USA Inc.In Stock: 91974HC93N,112 Datasheet

Current PartRFQ

CD74HC93E

Texas InstrumentsIn Stock: 2446CD74HC93E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HC93N,112 is determined by the following critical parameters:

• Logic Function: Binary counter with 4-bit capacity, 1 element configuration
• Trigger Mechanism: Negative edge triggering for clock input
• Reset Functionality: Asynchronous reset capability
• Electrical Compatibility: Supply voltage range 2 V – 6 V
• Physical Form Factor: 14-DIP package with 0.300" (7.62mm) pitch
• Mounting Method: Through-hole technology for PCB integration
• Compliance Standards: ROHS3 compliance and EAR99 classification

The CD74HC93E from Texas Instruments satisfies all these substitution criteria. Both parts operate within the same voltage envelope, share identical package geometry, and provide equivalent functional performance for binary counting applications.

Parameter Comparison

Engineering Selection Recommendations

The CD74HC93E from Texas Instruments is a direct functional equivalent for the obsolete 74HC93N,112. Selection of the substitute part is justified by:

• Regulatory Compliance: Both parts maintain ROHS3 compliance and EAR99 classification, ensuring compatibility with current procurement and export requirements
• Active Product Status: The CD74HC93E is actively manufactured and supported, eliminating supply chain risk associated with obsolete components
• Electrical Equivalence: Identical supply voltage range, logic function, and package form factor ensure drop-in compatibility in existing circuit designs
• Extended Temperature Range: The CD74HC93E supports -55°C to 125°C operation, providing broader environmental coverage compared to the -40°C to 125°C range of the original part
• Availability: Current inventory of 2360 units ensures reliable sourcing for production and maintenance applications

Frequently Asked Questions (FAQ)

Q: Can the CD74HC93E be used as a direct replacement for the 74HC93N,112 in existing designs?

A: Yes. Both parts share identical package geometry (14-DIP), supply voltage requirements (2 V – 6 V), and functional specifications (4-bit binary counter, asynchronous reset, negative edge trigger). No circuit modifications are required for substitution.

Q: What is the significance of the different count rates (108 MHz vs. 35 MHz)?

A: The count rate specification indicates the maximum frequency at which the counter can reliably operate. The 74HC93N,112 supports 108 MHz operation, while the CD74HC93E supports 35 MHz. For applications operating below 35 MHz, both parts are functionally equivalent. Applications requiring operation above 35 MHz must retain the original 74HC93N,112 or identify alternative parts with higher frequency ratings.

Q: Are there packaging differences between these parts?

A: Both parts use 14-DIP through-hole packaging with 0.300" (7.62mm) pitch. The CD74HC93E is supplied in tube packaging, while the original part packaging is not specified. This difference does not affect electrical or mechanical compatibility.

Q: Why is the CD74HC93E rated for a lower operating temperature minimum (-55°C vs. -40°C)?

A: The CD74HC93E supports an extended lower temperature range. This provides additional operational margin for applications in extreme environments. For standard industrial applications operating within -40°C to 125°C, both parts perform identically.

Q: Are both parts compliant with current environmental and export regulations?

A: Yes. Both the 74HC93N,112 and CD74HC93E are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. They meet current regulatory requirements for procurement and international distribution.