MM74HC4040M Equivalent & Substitute Parts

Part Overview

The MM74HC4040M is a 12-bit binary counter logic IC manufactured by onsemi in a 16-SOIC surface mount package. This component functions as a negative edge-triggered counter with asynchronous reset capability, operating across a 2V to 6V supply voltage range. The MM74HC4040M is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. Substitute parts must maintain identical logic functionality, package compatibility, and electrical operating parameters to ensure direct replacement without circuit redesign.

Key Parameters

Parameter	Value
Manufacturer Part Number	MM74HC4040M
Manufacturer	onsemi
Logic Type	Binary Counter
Number of Bits	12 Bit
Direction	Up
Reset Type	Asynchronous
Trigger Type	Negative Edge
Count Rate	50 MHz
Voltage Supply Range	2V to 6V
Operating Temperature	-40°C to 85°C
Package Type	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC4040M is determined by strict adherence to the following core parameters:

Critical Matching Parameters:

Logic Type: Binary Counter (12-bit, up-counting)
Trigger Type: Negative Edge
Reset Type: Asynchronous
Number of Elements: 1
Number of Bits per Element: 12
Voltage Supply Range: 2V to 6V minimum
Package Type: 16-SOIC form factor
Mounting Type: Surface Mount

Acceptable Variation Parameters:

Count Rate: Substitute parts may exceed the 50 MHz specification of the MM74HC4040M
Operating Temperature Range: Substitute parts may provide extended temperature ranges beyond -40°C to 85°C
Product Status: Active or Obsolete status does not affect functional substitution
Packaging Format: Cut Tape, Tape & Reel, or Tube configurations are interchangeable for the same package type

All identified substitute parts maintain identical logic functionality, pin configuration, and electrical characteristics within the specified voltage and temperature operating windows. Substitution is valid when the substitute part meets or exceeds the electrical performance of the original MM74HC4040M.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Bits	Count Rate (MHz)	Voltage Supply	Temp Range (°C)	Package	Status	RoHS
MM74HC4040M	onsemi	Binary Counter	12	50	2V-6V	-40 to 85	16-SOIC	Obsolete	N/A
MC74HC4040ADR2G	onsemi	Binary Counter	12	50	2V-6V	-55 to 125	16-SOIC	Active	ROHS3
74HC4040D,653	Nexperia USA Inc.	Binary Counter	12	98	2V-6V	-40 to 125	16-SOIC	Active	ROHS3
CD74HC4040M96	Texas Instruments	Binary Counter	12	35	2V-6V	-55 to 125	16-SOIC	Active	ROHS3
MC74HC4040ADG	onsemi	Binary Counter	12	50	2V-6V	-55 to 125	16-SOIC	Obsolete	ROHS3
SN74HC4040D	Texas Instruments	Binary Counter	12	33	2V-6V	-40 to 85	16-SOIC	Discontinued	ROHS3
SN74HC4040DR	Texas Instruments	Binary Counter	12	33	2V-6V	-40 to 85	16-SOIC	Active	ROHS3
SN74HC4040DT	Texas Instruments	Binary Counter	12	33	2V-6V	-40 to 85	16-SOIC	Discontinued	ROHS3
SN74HC4040NSR	Texas Instruments	Binary Counter	12	33	2V-6V	-40 to 85	16-SOIC	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation: MC74HC4040ADR2G

The MC74HC4040ADR2G is the optimal substitute for the MM74HC4040M. Both parts are manufactured by onsemi, share identical 50 MHz count rate specifications, and maintain the same 16-SOIC package footprint. The MC74HC4040ADR2G holds Active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The extended operating temperature range (-55°C to 125°C) provides superior thermal performance compared to the original part's -40°C to 85°C specification.

Secondary Recommendation: 74HC4040D,653

The 74HC4040D,653 from Nexperia USA Inc. provides an Active status alternative with the highest count rate specification (98 MHz) among available substitutes. This part exceeds the MM74HC4040M performance envelope and maintains full 16-SOIC package compatibility. ROHS3 compliance and extended temperature range (-40°C to 125°C) support modern manufacturing and environmental requirements.

Tertiary Recommendation: CD74HC4040M96

The CD74HC4040M96 from Texas Instruments is an Active status part with ROHS3 compliance and extended temperature range (-55°C to 125°C). While the count rate specification (35 MHz) is lower than the original MM74HC4040M, this part remains functionally equivalent for applications not requiring maximum frequency performance.

Active Status Alternatives:

SN74HC4040DR and SN74HC4040NSR from Texas Instruments are both Active status parts suitable for direct substitution. Both maintain the original operating temperature range (-40°C to 85°C) and provide ROHS3 compliance. These parts are recommended when thermal performance matching is required.

Avoid:

SN74HC4040D and SN74HC4040DT are classified as Discontinued at DiGi Electronics and should not be selected for new designs or long-term production applications.

Frequently Asked Questions (FAQ)

Q: Can the MM74HC4040M be directly replaced with any of the listed substitute parts?

A: Yes. All listed substitute parts maintain identical logic functionality, pin configuration, and electrical operating parameters within the 2V to 6V supply voltage range. Direct PCB substitution is valid without circuit modification.

Q: What is the significance of the different count rate specifications among substitute parts?

A: Count rate represents the maximum frequency at which the counter can operate reliably. The MM74HC4040M specifies 50 MHz. Substitute parts with equal or higher count rates (MC74HC4040ADR2G at 50 MHz, 74HC4040D,653 at 98 MHz) are fully compatible. Parts with lower count rates (CD74HC4040M96 at 35 MHz, SN74HC4040DR at 33 MHz) remain functionally equivalent but may not support applications requiring the full 50 MHz performance envelope.

Q: Does the extended temperature range of substitute parts affect compatibility?

A: No. Extended temperature ranges represent enhanced performance specifications. A substitute part rated for -55°C to 125°C will function correctly in applications designed for the original -40°C to 85°C range. Extended temperature capability does not introduce incompatibility.

Q: Are there package differences between substitute parts?

A: All substitute parts use the 16-SOIC surface mount package. Minor dimensional variations exist between manufacturers (0.154" versus 0.209" width specifications), but these fall within standard PCB footprint tolerances for 16-SOIC components. Packaging format variations (Cut Tape, Tape & Reel, Tube) do not affect electrical or mechanical compatibility.

Q: What is the importance of ROHS3 compliance in substitute selection?

A: ROHS3 compliance indicates adherence to Restriction of Hazardous Substances regulations. Most substitute parts carry ROHS3 certification, supporting modern manufacturing standards and environmental requirements. The original MM74HC4040M does not specify RoHS status, but ROHS3-compliant substitutes are recommended for new production.

Q: Why is the MM74HC4040M classified as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. This classification necessitates substitute part identification for design continuity and production support. Active status alternatives ensure long-term component availability.

Q: Can substitute parts be mixed within a single design?

A: Yes. All substitute parts are functionally equivalent and can be used interchangeably within the same circuit. However, maintaining consistent part sourcing from a single manufacturer or supplier is recommended for production consistency and supply chain management.

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