MM74HC4040SJ Equivalent & Substitute Parts

Part Overview

The MM74HC4040SJ is a 12-bit binary counter logic IC manufactured by onsemi in a 16-SOP 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 part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

MM74HC4040SJ

onsemiIn Stock: 764MM74HC4040SJ Datasheet

Current PartRFQ

74HC4040D,653

Nexperia USA Inc.In Stock: 520374HC4040D,653 Datasheet

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CD74HC4040M96

Texas InstrumentsIn Stock: 1646CD74HC4040M96 Datasheet

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SN74HC4040D

Texas InstrumentsIn Stock: 1920SN74HC4040D Datasheet

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SN74HC4040DR

Texas InstrumentsIn Stock: 2194SN74HC4040DR Datasheet

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SN74HC4040DT

Texas InstrumentsIn Stock: 1323SN74HC4040DT Datasheet

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SN74HC4040NSR

Texas InstrumentsIn Stock: 2256SN74HC4040NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MM74HC4040SJ is determined by strict adherence to the following core parameters:

• Logic Function: All substitutes must be 12-bit binary counters with negative edge triggering and asynchronous reset
• Voltage Supply: All substitutes must operate within the 2V to 6V range
• Mounting and Package: Surface mount technology with 16-pin SOIC package footprint compatibility
• Base Product Number: All qualified substitutes share the 74HC4040 base designation, ensuring functional equivalence

The substitute parts listed below meet these criteria across different manufacturers and packaging options. Variations in count rate, maximum operating temperature, and product status are noted but do not affect functional substitutability within the specified electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74HC4040DR or SN74HC4040NSR (Texas Instruments)

Both parts are currently active in production with ROHS3 compliance certification. They maintain identical electrical specifications to the original MM74HC4040SJ within the specified operating temperature range (-40°C to 85°C) and supply voltage (2V to 6V). The 16-SOIC package footprint is compatible with existing PCB designs.

Extended Temperature Range Option: CD74HC4040M96 (Texas Instruments)

This variant extends the maximum operating temperature to 125°C while maintaining all core functional parameters. Selection of this part is appropriate for applications requiring enhanced thermal performance beyond the standard -40°C to 85°C range.

High-Speed Alternative: 74HC4040D,653 (Nexperia USA Inc.)

This part offers the highest count rate specification (98 MHz) among available substitutes and extends maximum operating temperature to 125°C. The 3.90mm package width differs from the original 5.30mm specification; PCB layout verification is required to confirm mechanical compatibility.

All recommended substitutes maintain REACH compliance and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can I directly replace MM74HC4040SJ with any of these substitute parts?

A: Yes, all listed substitutes are functionally equivalent within the specified electrical parameters (12-bit binary counter, negative edge trigger, asynchronous reset, 2V to 6V supply). However, verify package width compatibility with your PCB layout, as some substitutes use 3.90mm width packages versus the original 5.30mm width.

Q: What is the difference between the various Texas Instruments part numbers (SN74HC4040D, SN74HC4040DR, SN74HC4040DT, SN74HC4040NSR)?

A: These parts share identical electrical specifications but differ in packaging format and product status. SN74HC4040DR and SN74HC4040NSR are currently active. SN74HC4040D and SN74HC4040DT are discontinued at DiGi Electronics. The suffix indicates packaging: D = Tube, DR = Cut Tape & Digi-Reel, DT = Tape & Reel, NSR = Tape & Reel.

Q: Does the higher count rate of 74HC4040D,653 (98 MHz) versus the original MM74HC4040SJ (50 MHz) affect compatibility?

A: No. Higher count rate capability does not affect functional compatibility. The part will operate correctly in applications designed for the original 50 MHz specification. The 3.90mm package width requires PCB layout verification.

Q: Are all substitutes RoHS compliant?

A: The substitute parts listed are ROHS3 compliant. The original MM74HC4040SJ RoHS status was not specified in the provided data.

Q: Which substitute should I select for new designs?

A: For new designs, select SN74HC4040DR or SN74HC4040NSR (Texas Instruments, active status, ROHS3 compliant). Both maintain the original operating temperature range and package dimensions. For applications requiring extended temperature operation, select CD74HC4040M96.

Q: What is the significance of the 16-SOIC package width difference (3.90mm vs 5.30mm)?

A: Package width affects PCB footprint spacing. Verify that substitute parts with 3.90mm width packages fit within your existing PCB layout constraints before procurement.