74VHC4040M Binary Counter 12-Bit Logic IC Equivalent & Substitute Parts

Part Overview

The 74VHC4040M is a 12-bit binary counter logic IC manufactured by onsemi, housed in a 16-SOIC surface mount package. This component functions as a single-element asynchronous binary counter with negative edge triggering, designed for applications requiring high-speed counting operations up to 210 MHz. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

74VHC4040M

onsemiIn Stock: 81574VHC4040M Datasheet

Current PartRFQ

MC74AC4040DG

onsemiIn Stock: 2345MC74AC4040DG Datasheet

SimilarRFQ

SN74LV4040AD

Texas InstrumentsIn Stock: 2056SN74LV4040AD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74VHC4040M is determined by strict alignment across the following critical parameters:

• Logic Function: All substitutes must be 12-bit binary counters with asynchronous reset and negative edge triggering
• Package Compatibility: All substitutes must use 16-SOIC surface mount packaging with identical pin configuration
• Electrical Specifications: Supply voltage range, operating temperature range, and count rate capability must meet or exceed the original specification
• Pin Configuration: Identical 16-pin SOIC layout ensures direct PCB compatibility without redesign

The two qualified substitute parts—MC74AC4040DG (onsemi, 74AC series) and SN74LV4040AD (Texas Instruments, 74LV series)—satisfy all substitution criteria while offering different performance and compliance characteristics suitable for various application requirements.

Parameter Comparison

Engineering Selection Recommendations

MC74AC4040DG is suitable for applications where the 140 MHz count rate is sufficient and extended supply voltage range (up to 6 V) provides operational flexibility. This part maintains onsemi manufacturing continuity and carries ROHS3 compliance certification.

SN74LV4040AD is appropriate for designs requiring Texas Instruments sourcing or where the 95 MHz count rate meets application requirements. This part is discontinued at DiGi Electronics but carries ROHS3 compliance and represents the lowest count rate among available substitutes.

Both substitutes maintain identical package geometry, pin configuration, and core functional specifications (12-bit binary counter, asynchronous reset, negative edge triggering, -40°C to 85°C operating range). Selection between substitutes depends on procurement availability, supply voltage requirements, and maximum count rate tolerance for the specific application.

Frequently Asked Questions (FAQ)

Q: Can MC74AC4040DG directly replace 74VHC4040M on existing PCBs?

A: Yes. Both parts use identical 16-SOIC packaging with matching pin assignments. No PCB redesign is required for physical substitution.

Q: What is the primary difference between the substitute parts?

A: Count rate capability differs: MC74AC4040DG operates at 140 MHz, while SN74LV4040AD operates at 95 MHz. The original 74VHC4040M operates at 210 MHz. Supply voltage range also differs: MC74AC4040DG supports 2 V to 6 V, while both 74VHC4040M and SN74LV4040AD support 2 V to 5.5 V.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both MC74AC4040DG and SN74LV4040AD carry ROHS3 compliance certification. The original 74VHC4040M RoHS status is not specified in available documentation.

Q: Which substitute should I select if my application requires the highest count rate?

A: MC74AC4040DG provides the highest count rate among substitutes at 140 MHz, though this remains below the original 74VHC4040M specification of 210 MHz. If 210 MHz operation is mandatory, neither substitute is suitable.

Q: Are there any moisture sensitivity concerns with these parts?

A: No. All three parts—74VHC4040M, MC74AC4040DG, and SN74LV4040AD—carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: Do all parts meet REACH compliance requirements?

A: Yes. All three parts carry REACH Unaffected status, confirming compliance with REACH regulatory requirements.