CD4040BCMX Equivalent & Substitute Parts

Part Overview

The CD4040BCMX is a 12-bit binary counter IC manufactured by onsemi in the 4000B logic series. This component functions as a negative-edge-triggered counter with asynchronous reset, designed for digital counting and frequency division applications. The CD4040BCMX is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives from multiple manufacturers provide functional equivalence while maintaining compatibility with the original electrical and mechanical specifications.

Substiute Parts

CD4040BCMX

onsemiIn Stock: 1180CD4040BCMX Datasheet

Current PartRFQ

MC14040BDR2G

onsemiIn Stock: 2136MC14040BDR2G Datasheet

DirectRFQ

MC14040BDG

onsemiIn Stock: 2013MC14040BDG Datasheet

SimilarRFQ

NLV14040BDR2G

onsemiIn Stock: 3343NLV14040BDR2G Datasheet

SimilarRFQ

CD4040BM

Texas InstrumentsIn Stock: 5325CD4040BM Datasheet

SimilarRFQ

CD4040BNSR

Texas InstrumentsIn Stock: 5447CD4040BNSR Datasheet

SimilarRFQ

HEC4040BT,112

NXP SemiconductorsIn Stock: 820HEC4040BT,112 Datasheet

SimilarRFQ

HEF4040BT,653

Nexperia USA Inc.In Stock: 14375HEF4040BT,653 Datasheet

SimilarRFQ

CD4040BM96

Texas InstrumentsIn Stock: 30580CD4040BM96 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD4040BCMX are classified based on electrical parameter compatibility and mechanical interchangeability. The primary substitution criteria are:

Core Electrical Parameters:

• 12-bit binary counter configuration
• Negative-edge trigger mechanism
• Asynchronous reset functionality
• 16-pin SOIC package footprint

Voltage and Temperature Compatibility: Substitutes must support the supply voltage range of 3 V to 15 V minimum. Parts with extended ranges (up to 18 V) are fully compatible. Operating temperature ranges of -55°C to 125°C are preferred for industrial applications; parts with narrower ranges (-40°C to 85°C) are suitable for commercial-grade applications only.

Count Rate Considerations: The CD4040BCMX operates at 12 MHz. Substitute parts rated at 10 MHz or higher meet the minimum performance requirement. Parts rated at 50 MHz exceed the original specification and provide performance margin.

Package Compatibility: All listed substitutes use 16-SOIC surface-mount packaging with 0.154" width (3.90mm). The CD4040BNSR variant uses 16-SO packaging with 0.209" width (5.30mm) and requires PCB layout verification before substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement):

CD4040BM96 (Texas Instruments) and CD4040BM (Texas Instruments) are the preferred direct substitutes. Both maintain the 12 MHz count rate, support the full -55°C to 125°C temperature range, and use the standard 16-SOIC (0.154") package. CD4040BM96 is available in Cut Tape & Digi-Reel packaging with the highest inventory (30,523 pcs), making it the optimal choice for production environments.

onsemi Alternatives:

MC14040BDR2G, MC14040BDG, and NLV14040BDR2G are active onsemi products that maintain full temperature range compatibility (-55°C to 125°C) and extended voltage support (3 V ~ 18 V). The 10 MHz count rate is acceptable for applications not requiring the full 12 MHz specification. These parts are suitable when onsemi sourcing is preferred.

High-Performance Alternatives:

HEF4040BT,653 (Nexperia USA Inc.) and HEC4040BT,112 (NXP Semiconductors) offer 50 MHz count rates, providing significant performance margin. However, these parts operate within a narrower temperature range (-40°C to 85°C) and voltage window (4.5 V ~ 15.5 V). These are appropriate for commercial-grade applications that do not require the extended industrial temperature range.

Package Consideration:

CD4040BNSR uses 16-SO packaging (0.209" width) instead of the standard 16-SOIC (0.154" width). PCB layout verification is required before substitution, as the wider package may not fit existing footprints without modification.

Frequently Asked Questions (FAQ)

Q: Can I substitute CD4040BCMX with any of the listed parts?

A: Direct substitution depends on your application requirements. For industrial applications requiring -55°C to 125°C operation, use CD4040BM96, CD4040BM, MC14040BDR2G, MC14040BDG, or NLV14040BDR2G. For commercial applications (-40°C to 85°C), HEF4040BT,653 and HEC4040BT,112 are acceptable. All parts maintain the 12-bit binary counter, negative-edge trigger, and asynchronous reset functionality.

Q: What is the difference between the onsemi MC14040 and NLV14040 variants?

A: Both MC14040BDR2G/BDG and NLV14040BDR2G are onsemi products with identical electrical specifications (10 MHz count rate, 3 V ~ 18 V supply, -55°C to 125°C operation). The difference is in the product line designation. Both are suitable substitutes for the CD4040BCMX.

Q: Why do HEF4040BT,653 and HEC4040BT,112 have different temperature ranges?

A: These NXP/Nexperia parts are rated for commercial-grade operation (-40°C to 85°C) rather than industrial-grade (-55°C to 125°C). They are suitable for applications within this narrower temperature window. If your design requires the full -55°C to 125°C range, select Texas Instruments or onsemi alternatives.

Q: Is the CD4040BNSR package compatible with my existing PCB?

A: CD4040BNSR uses 16-SO packaging (0.209" width) compared to the standard 16-SOIC (0.154" width) used by CD4040BCMX and most substitutes. Verify your PCB footprint specifications before substitution. If your design uses the narrower 0.154" footprint, CD4040BNSR will not fit without layout modification.

Q: What is the minimum count rate I should accept for a substitute?

A: The CD4040BCMX operates at 12 MHz. Substitutes rated at 10 MHz (MC14040 and NLV14040 variants) meet the minimum requirement. Parts rated at 12 MHz or higher (CD4040BM, CD4040BM96, CD4040BNSR) or 50 MHz (HEF4040BT,653, HEC4040BT,112) provide equal or superior performance.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes, all active substitute parts listed are RoHS3 compliant. The original CD4040BCMX does not specify RoHS status due to its obsolete classification.

Q: Which substitute has the best inventory availability?

A: CD4040BM96 (Texas Instruments) has the highest inventory at 30,523 pcs. HEF4040BT,653 (Nexperia USA Inc.) is the second option with 14,269 pcs available.