SN74HC4040D Equivalent & Substitute Parts

Part Overview

The SN74HC4040D is a 12-bit binary counter IC manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This logic component functions as a negative edge-triggered counter with asynchronous reset capability, operating across a 2V to 6V supply range with a maximum count rate of 33 MHz. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines that maintain electrical and mechanical compatibility.

Substiute Parts

SN74HC4040D

Texas InstrumentsIn Stock: 1920SN74HC4040D Datasheet

Current PartRFQ

SN74HC4040DR

Texas InstrumentsIn Stock: 2194SN74HC4040DR Datasheet

DirectRFQ

MC74HC4040ADG

onsemiIn Stock: 2841MC74HC4040ADG Datasheet

DirectRFQ

74HC4040D,653

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

UpgradeRFQ

74HC4040D-Q100J

Nexperia USA Inc.In Stock: 313374HC4040D-Q100J Datasheet

MFR RecommendedRFQ

MC74HC4040ADR2G

onsemiIn Stock: 7162MC74HC4040ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC4040D is determined by strict equivalence across the following parameters: logic type (binary counter), bit width (12-bit), element count (1), count direction (up), trigger mechanism (negative edge), reset configuration (asynchronous), supply voltage range (2V to 6V minimum), package type (16-SOIC), and compliance certifications (ROHS3, REACH Unaffected, EAR99).

Substitute parts are grouped into three categories based on product status and performance characteristics:

Direct Substitutes maintain identical electrical specifications and packaging, differing only in packaging format (Cut Tape vs. Tube).

Upgrade Substitutes provide enhanced performance (higher count rate, extended temperature range) while maintaining full backward compatibility with the original design requirements.

Manufacturer Recommended Substitutes are actively supported alternatives from primary manufacturers, including automotive-qualified variants for applications requiring AEC-Q100 certification.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): SN74HC4040DR is the primary active substitute from Texas Instruments, maintaining the original 33 MHz count rate and -40°C to 85°C operating range. This part differs only in packaging format (Cut Tape & Digi-Reel vs. Tube) and product status (Active vs. Discontinued), making it the preferred choice for designs requiring no performance changes.

For Performance Enhancement: 74HC4040D,653 (Nexperia) and 74HC4040D-Q100J (Nexperia) provide upgraded specifications with 98 MHz count rate and extended temperature range (-40°C to 125°C), enabling use in more demanding thermal environments while maintaining full backward compatibility. These parts are actively manufactured and ROHS3 compliant.

For Automotive Applications: 74HC4040D-Q100J includes AEC-Q100 qualification, suitable for automotive-grade designs requiring manufacturer certification. This part combines performance enhancement with automotive compliance.

For Extended Temperature Range: MC74HC4040ADG and MC74HC4040ADR2G (onsemi) support -55°C to 125°C operation, accommodating industrial and military temperature specifications. MC74HC4040ADR2G is the active Tape & Reel variant.

All substitute parts maintain ROHS3 compliance, REACH Unaffected status, and EAR99 classification, ensuring regulatory equivalence with the original SN74HC4040D.

Frequently Asked Questions (FAQ)

Q: Can SN74HC4040DR be used as a direct replacement for SN74HC4040D? A: Yes. SN74HC4040DR is electrically and functionally identical to SN74HC4040D, differing only in packaging format (Cut Tape & Digi-Reel vs. Tube) and product status (Active vs. Discontinued). Both operate at 33 MHz with -40°C to 85°C temperature range and 2V to 6V supply voltage.

Q: What is the difference between the 16-SOIC packages listed (0.209" vs. 0.154" width)? A: Package width differences reflect manufacturing variations between suppliers. The 0.209" width (Texas Instruments SN74HC4040D/SN74HC4040DR) and 0.154" width (Nexperia, onsemi) are both 16-SOIC packages with identical pin pitch and electrical compatibility. PCB footprints must accommodate the specific width of the selected part.

Q: Can I use 74HC4040D,653 or 74HC4040D-Q100J in place of SN74HC4040D? A: Yes. Both parts are backward compatible with SN74HC4040D, offering enhanced performance (98 MHz vs. 33 MHz count rate) and extended temperature range (-40°C to 125°C vs. -40°C to 85°C). No design modifications are required; these parts operate within all original electrical specifications.

Q: Which substitute should I select for automotive applications? A: 74HC4040D-Q100J is qualified to AEC-Q100 standard, making it the appropriate choice for automotive designs. It combines performance enhancement with automotive-grade certification.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts (SN74HC4040DR, MC74HC4040ADG, 74HC4040D,653, 74HC4040D-Q100J, MC74HC4040ADR2G) are ROHS3 compliant and REACH Unaffected, maintaining regulatory equivalence with the original SN74HC4040D.

Q: What is the difference between MC74HC4040ADG and MC74HC4040ADR2G? A: Both are onsemi 12-bit binary counters with identical electrical specifications (50 MHz count rate, -55°C to 125°C operation). MC74HC4040ADG is listed as Obsolete, while MC74HC4040ADR2G is Active and supplied in Tape & Reel format. MC74HC4040ADR2G is the recommended active variant.

Q: Can I mix different manufacturers' parts in the same design? A: Yes. All substitute parts maintain identical logic functionality, pin configuration, and electrical specifications within their respective parameter ranges. Cross-manufacturer substitution is supported for the 74HC4040 binary counter family.