MM74C193N Binary Counter IC - Equivalent & Substitute Parts

Part Overview

The MM74C193N is a 4-bit binary counter IC manufactured by onsemi, housed in a 16-DIP package. This device functions as a synchronous up/down counter with asynchronous reset capability, designed for digital counting and sequencing applications. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

MM74C193N

onsemiIn Stock: 2104MM74C193N Datasheet

Current PartRFQ

CD40193BE

Harris CorporationIn Stock: 3796CD40193BE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MM74C193N is determined by strict equivalence across the following critical parameters:

• Logic Function: Binary counter with 4-bit capacity
• Directional Capability: Up and down counting modes
• Reset Architecture: Asynchronous reset functionality
• Timing Behavior: Synchronous operation
• Trigger Mechanism: Positive edge triggering
• Physical Form Factor: 16-DIP through-hole package
• Operating Environment: Temperature range -55°C to 125°C
• Power Supply Compatibility: Voltage range overlap within 3 V to 15 V minimum

The CD40193BE from Harris Corporation meets all functional and physical requirements for direct substitution. Both devices share identical logic architecture, pin configuration, and operational characteristics within their specified parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

Both the MM74C193N and CD40193BE are classified as obsolete components. Selection between these parts should be based on the following criteria:

MM74C193N (onsemi): Supports maximum count rate of 10 MHz. Select this part when system timing requirements demand the higher frequency specification within the 3 V to 15 V supply range.

CD40193BE (Harris Corporation): Operates at 5.5 MHz maximum count rate but supports extended supply voltage range up to 18 V. Select this part when applications require the broader voltage tolerance or when 5.5 MHz operation meets system requirements.

Both devices provide identical functional logic, pin compatibility, and package form factor. The choice between them depends on whether your application prioritizes maximum count rate or extended voltage supply range. Both are RoHS non-compliant and carry ECCN classification EAR99.

Frequently Asked Questions (FAQ)

Q: Can the CD40193BE directly replace the MM74C193N in existing designs?

A: Yes, the CD40193BE provides direct pin-for-pin and functional replacement. Both devices share identical 16-DIP package dimensions, logic architecture, and operational modes. No circuit modifications are required for substitution.

Q: What is the primary difference between these two counter ICs?

A: The MM74C193N operates at a maximum count rate of 10 MHz with supply voltage range 3 V to 15 V. The CD40193BE operates at 5.5 MHz but supports extended supply voltage up to 18 V. Both maintain identical functional logic and pin configuration.

Q: Are there any compliance or regulatory differences between these parts?

A: Both parts are classified as obsolete and RoHS non-compliant. Both carry ECCN classification EAR99 and HTSUS code 8542.39.0001. No compliance advantage exists between the two options.

Q: Which part should I select for new designs?

A: Both parts are obsolete. For new designs, evaluation of current-generation binary counter alternatives outside the 74C and 4000B series is recommended. If legacy compatibility is mandatory, selection between MM74C193N and CD40193BE depends on whether your application requires 10 MHz operation (MM74C193N) or extended 18 V supply voltage support (CD40193BE).

Q: Are these parts available in other package options?

A: Both the MM74C193N and CD40193BE are specified exclusively in 16-DIP through-hole packages. No surface-mount or alternative package variants are provided for these part numbers.