MM74HC4040MTC 12-Bit Binary Counter IC Equivalent & Substitute Parts

Part Overview

The MM74HC4040MTC is a 12-bit binary counter IC manufactured by onsemi in a 16-TSSOP surface mount package. This counter operates as a negative edge-triggered device with asynchronous reset, designed for digital counting and frequency division applications across a 2V to 6V supply range. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
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-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC4040MTC is determined by strict alignment with the following core parameters:

Logic Function: Binary counter with 12-bit capacity, single element, up-counting direction
Electrical Characteristics: Negative edge trigger, asynchronous reset, 2V to 6V supply compatibility
Package Compatibility: 16-TSSOP surface mount package (0.173", 4.40mm width)
Functional Performance: Count rate capability of 50 MHz or higher
Environmental Ratings: Operating temperature range and moisture sensitivity level

Substitute parts are grouped into two categories based on package type and performance specifications:

Category 1: 16-TSSOP Package (Direct Pin-Compatible) Parts maintaining the identical 16-TSSOP package footprint with equivalent or superior electrical performance.

Category 2: 16-SOIC Package (Functional Equivalent, Different Footprint) Parts with identical logic function but different surface mount package, requiring PCB layout modification.

Parameter Comparison

Part Number	Manufacturer	Package Type	Count Rate (MHz)	Operating Temp (°C)	Product Status	RoHS Compliance
MM74HC4040MTC	onsemi	16-TSSOP	50	-40 to 85	Obsolete	Not specified
MC74HC4040ADTR2G	onsemi	16-TSSOP	50	-55 to 125	Active	ROHS3 Compliant
74HC4040PW,118	Nexperia USA Inc.	16-TSSOP	98	-40 to 125	Active	ROHS3 Compliant
SN74HC4040DBR	Texas Instruments	16-SOIC	33	-40 to 85	Active	ROHS3 Compliant
SN74HC4040PW	Texas Instruments	16-TSSOP	33	-40 to 85	Discontinued at DiGi Electronics	ROHS3 Compliant
SN74HC4040PWR	Texas Instruments	16-TSSOP	33	-40 to 85	Active	ROHS3 Compliant
SN74HC4040PWT	Texas Instruments	16-TSSOP	33	-40 to 85	Discontinued at DiGi Electronics	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: MC74HC4040ADTR2G (onsemi)

This part is the direct functional equivalent from the same manufacturer as the obsolete MM74HC4040MTC. It maintains identical logic specifications, package footprint, and pin configuration. The extended operating temperature range (-55°C to 125°C) provides broader environmental coverage than the original part. Active product status ensures long-term availability. ROHS3 compliance meets current regulatory requirements.

Secondary Recommendation: 74HC4040PW,118 (Nexperia USA Inc.)

This part offers the highest count rate performance (98 MHz) among available substitutes, exceeding the original 50 MHz specification. It maintains 16-TSSOP package compatibility and active product status. Extended operating temperature range to 125°C and ROHS3 compliance support modern design requirements. Cut Tape and Digi-Reel packaging options provide flexibility for production volumes.

Alternative Recommendation: SN74HC4040PWR (Texas Instruments)

This part provides active product status with 16-TSSOP package compatibility. It is suitable for applications where the original 50 MHz count rate specification is not a limiting factor. ROHS3 compliance and established supply chain availability through multiple distributors support long-term production continuity.

Package Variant: SN74HC4040DBR (Texas Instruments)

This part is functionally equivalent but uses a 16-SOIC package instead of 16-TSSOP. Selection requires PCB layout modification and is appropriate only when 16-SOIC footprint compatibility exists in the target design. Active product status and ROHS3 compliance are maintained.

Frequently Asked Questions (FAQ)

Q: Can I directly replace MM74HC4040MTC with MC74HC4040ADTR2G without PCB modification?

A: Yes. Both parts use the 16-TSSOP package with identical pin configuration and electrical specifications. No PCB layout changes are required.

Q: What is the difference between 16-TSSOP and 16-SOIC packages?

A: 16-TSSOP (Thin Shrink Small Outline Package) has a 0.173" width, while 16-SOIC (Small Outline Integrated Circuit) has a 0.209" width. These are different footprints and require separate PCB designs. Pin pitch and lead geometry also differ.

Q: Why does 74HC4040PW,118 have a higher count rate (98 MHz) than the original part (50 MHz)?

A: Count rate specification reflects the maximum frequency at which the counter reliably operates. Higher count rate indicates improved semiconductor process technology or design optimization by the manufacturer.

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