MM74HC4040MTCX Equivalent & Substitute Parts

Part Overview

The MM74HC4040MTCX is a 12-bit binary counter logic IC manufactured by onsemi, housed in a 16-TSSOP surface mount package. This component functions as a negative edge-triggered counter with asynchronous reset, operating across a 2 V to 6 V supply range and supporting count rates up to 50 MHz. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

MM74HC4040MTCX

onsemiIn Stock: 4975MM74HC4040MTCX Datasheet

Current PartRFQ

MC74HC4040ADTR2G

onsemiIn Stock: 896MC74HC4040ADTR2G Datasheet

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74HC4040PW,118

Nexperia USA Inc.In Stock: 250674HC4040PW,118 Datasheet

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SN74HC4040DBR

Texas InstrumentsIn Stock: 2926SN74HC4040DBR Datasheet

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SN74HC4040PW

Texas InstrumentsIn Stock: 2534SN74HC4040PW Datasheet

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SN74HC4040PWR

Texas InstrumentsIn Stock: 3111SN74HC4040PWR Datasheet

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SN74HC4040PWT

Texas InstrumentsIn Stock: 899SN74HC4040PWT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MM74HC4040MTCX is determined by the following critical parameters:

• Base product number (74HC4040 series)
• Logic type (binary counter)
• Bit width (12-bit)
• Trigger mechanism (negative edge)
• Reset type (asynchronous)
• Supply voltage range (2 V ~ 6 V minimum compatibility)
• Package compatibility (16-TSSOP or equivalent footprint)
• Mounting type (surface mount)

Substitute parts are grouped into two categories based on package type: 16-TSSOP variants and 16-SOIC variants. All listed substitutes maintain the core 12-bit binary counter functionality with identical logic operation. Differences in count rate specifications and operating temperature ranges are noted but do not prevent functional substitution when the application requirements fall within the substitute part's specifications.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the obsolete MM74HC4040MTCX, the MC74HC4040ADTR2G from onsemi is the primary recommendation. This part maintains identical package geometry (16-TSSOP), equivalent count rate specification (50 MHz), and extends the operating temperature range to -55°C ~ 125°C. The part is currently active and available in Tape & Reel packaging, suitable for production environments.

The 74HC4040PW,118 from Nexperia USA Inc. provides an alternative with enhanced count rate performance (98 MHz) and extended upper operating temperature limit (125°C), also in 16-TSSOP package. This part is active and available in standard cut tape format.

For applications where package footprint flexibility exists, the SN74HC4040DBR from Texas Instruments offers an active alternative in 16-SOIC package. This substitution requires PCB layout modification due to different package dimensions (0.209" versus 0.173" width).

The SN74HC4040PWR from Texas Instruments provides an active 16-TSSOP option with identical operating temperature range to the original part. This part is currently available in cut tape format.

All substitute parts maintain ROHS3 compliance and REACH unaffected status where specified, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC4040DBR be used as a direct replacement for the MM74HC4040MTCX?

A: The SN74HC4040DBR is functionally equivalent but requires PCB layout modification. The part uses a 16-SOIC package (0.209" width) instead of the 16-TSSOP package (0.173" width) of the original. Pin count and function remain identical, but the physical footprint differs, necessitating board redesign.

Q: What is the difference between the onsemi and Texas Instruments 74HC4040 variants?

A: Both manufacturers produce 74HC4040 binary counters with identical logic functionality. Differences exist in count rate specifications (onsemi: 50 MHz, Texas Instruments: 33 MHz) and packaging availability. Selection depends on application speed requirements and preferred supplier.

Q: Is the 74HC4040PW,118 from Nexperia a suitable replacement?

A: Yes. The 74HC4040PW,118 is functionally compatible and offers superior count rate performance (98 MHz) compared to the original 50 MHz specification. It maintains the same 16-TSSOP package footprint and supply voltage range. The extended operating temperature range (-40°C ~ 125°C) provides additional margin for demanding applications.

Q: Why do some substitute parts show "Discontinued at DiGi Electronics" status?

A: Parts marked as discontinued at DiGi Electronics may remain available through other distributors or direct manufacturer channels. Availability should be verified with your component supplier before design finalization.

Q: Are all listed substitutes RoHS compliant?

A: All active substitute parts listed are ROHS3 compliant. The original MM74HC4040MTCX does not specify RoHS status in the provided data. Verify RoHS compliance requirements with your procurement or quality department.

Q: Can I use a substitute with a lower count rate specification?

A: Substitution with lower count rate parts (33 MHz versus 50 MHz) is permissible only if your application operates below the substitute part's maximum count rate. Verify that your circuit timing requirements do not exceed the substitute part's specifications.