CD4040BCM Equivalent & Substitute Parts

Part Overview

The CD4040BCM is a 12-bit binary counter logic IC manufactured by onsemi, housed in a 16-SOIC package. This component is classified as obsolete, though functionally equivalent active alternatives are available from multiple manufacturers. The CD4040BCM operates as a negative-edge-triggered counter with asynchronous reset, supporting supply voltages from 3V to 15V and a maximum count rate of 12 MHz. Due to its obsolete status, identifying qualified substitute parts is essential for design continuity and procurement reliability.

Key Parameters

Parameter	Value
Logic Type	Binary Counter
Number of Bits per Element	12 Bit
Direction	Up
Trigger Type	Negative Edge
Reset	Asynchronous
Count Rate	12 MHz
Voltage - Supply	3 V ~ 15 V
Operating Temperature	-55°C ~ 125°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Series	4000B

Substitute Part Grouping Explanation

Substitution of the CD4040BCM is determined by strict equivalence across the following critical parameters:

Logic Type: Binary Counter (all substitutes)
Number of Bits per Element: 12 Bit (all substitutes)
Trigger Type: Negative Edge (all substitutes)
Reset: Asynchronous (all substitutes)
Package / Case: 16-SOIC form factor (all substitutes)
Mounting Type: Surface Mount (all substitutes)
Series: 4000B (all substitutes)

Substitute parts are grouped into two categories:

Direct Substitutes (Identical Electrical Parameters): Parts with matching count rate (12 MHz), supply voltage range (3V–18V or compatible), and temperature range (-55°C to 125°C).

Functional Equivalents (Relaxed Electrical Parameters): Parts with higher count rates (50 MHz) or different supply voltage ranges (4.5V–15.5V) and temperature ranges (-40°C to 85°C), which remain functionally compatible but operate under different electrical specifications.

Parameter Comparison

Part Number	Manufacturer	Count Rate	Voltage - Supply	Operating Temperature	Package / Case	Product Status	RoHS Status
CD4040BCM	onsemi	12 MHz	3 V ~ 15 V	-55°C ~ 125°C	16-SOIC (0.154", 3.90mm)	Obsolete	Not Specified
MC14040BDG	onsemi	10 MHz	3 V ~ 18 V	-55°C ~ 125°C	16-SOIC (0.154", 3.90mm)	Active	ROHS3 Compliant
MC14040BDR2G	onsemi	10 MHz	3 V ~ 18 V	-55°C ~ 125°C	16-SOIC (0.154", 3.90mm)	Active	ROHS3 Compliant
NLV14040BDR2G	onsemi	10 MHz	3 V ~ 18 V	-55°C ~ 125°C	16-SOIC (0.154", 3.90mm)	Active	ROHS3 Compliant
CD4040BM96	Texas Instruments	12 MHz	3 V ~ 18 V	-55°C ~ 125°C	16-SOIC (0.154", 3.90mm)	Active	ROHS3 Compliant
CD4040BNSR	Texas Instruments	12 MHz	3 V ~ 18 V	-55°C ~ 125°C	16-SOIC (0.209", 5.30mm)	Active	ROHS3 Compliant
HEC4040BT,112	NXP Semiconductors	50 MHz	4.5 V ~ 15.5 V	-40°C ~ 85°C	16-SOIC (0.154", 3.90mm)	Active	ROHS3 Compliant
HEF4040BT,653	Nexperia USA Inc.	50 MHz	4.5 V ~ 15.5 V	-40°C ~ 85°C	16-SOIC (0.154", 3.90mm)	Active	ROHS3 Compliant
CD4040BM	Texas Instruments	12 MHz	3 V ~ 18 V	-55°C ~ 125°C	16-SOIC (0.154", 3.90mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Preferred Direct Substitutes:

CD4040BM (Texas Instruments) and CD4040BM96 (Texas Instruments) are the primary recommended substitutes. Both maintain identical count rate (12 MHz), matching supply voltage range (3V–18V), and identical operating temperature range (-55°C to 125°C). Both are active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Secondary Substitutes (onsemi):

MC14040BDG, MC14040BDR2G, and NLV14040BDR2G are active onsemi alternatives. These parts operate at 10 MHz (lower than the original 12 MHz) but support the extended supply voltage range (3V–18V) and maintain the full temperature range (-55°C to 125°C). These are suitable where the reduced count rate does not impact circuit performance.

Package Consideration:

CD4040BNSR uses a 16-SO package with 5.30mm width, differing from the standard 3.90mm width. This part maintains electrical equivalence but requires PCB layout verification for pin-to-pin compatibility.

Functional Equivalents (Higher Performance):

HEC4040BT,112 (NXP Semiconductors) and HEF4040BT,653 (Nexperia USA Inc.) offer significantly higher count rates (50 MHz) but operate under restricted electrical parameters: supply voltage 4.5V–15.5V and operating temperature -40°C to 85°C. These are suitable only for applications where the original 3V minimum supply voltage and -55°C minimum temperature are not required.

All substitute parts maintain ROHS3 compliance and are classified as active products, ensuring procurement reliability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can MC14040BDG replace CD4040BCM directly?

A: Yes, with operational consideration. MC14040BDG is functionally equivalent and maintains the same 12-bit binary counter architecture, negative-edge trigger, and asynchronous reset. However, it operates at 10 MHz versus the original 12 MHz. If the circuit design does not depend on the 12 MHz count rate, this substitution is valid. Both support the 3V–18V supply range and -55°C to 125°C operating temperature.

Q: What is the difference between CD4040BM and CD4040BM96?

A: Both are Texas Instruments CD4040 variants with identical electrical specifications: 12 MHz count rate, 3V–18V supply voltage, and -55°C to 125°C operating temperature. The primary difference is packaging: CD4040BM96 is supplied in Cut Tape (CT) & Digi-Reel format, while CD4040BM is supplied in Tube format. Selection depends on procurement and assembly requirements.

Q: Why do HEC4040BT,112 and HEF4040BT,653 have different electrical specifications?

A: These NXP and Nexperia parts are optimized for higher-speed applications, supporting 50 MHz count rates. However, they operate under restricted electrical parameters: minimum supply voltage of 4.5V (versus 3V for the original) and reduced temperature range (-40°C to 85°C versus -55°C to 125°C). These parts are suitable only for applications that do not require the original low-voltage or extended low-temperature operation.

Q: Is CD4040BNSR compatible with the original CD4040BCM?

A: CD4040BNSR is electrically equivalent but uses a 16-SO package with 5.30mm width instead of the standard 3.90mm width. Pin functionality and electrical specifications are identical. Compatibility depends on PCB layout and socket design. Physical verification is required before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant. The original CD4040BCM (obsolete) does not specify RoHS status. All recommended substitutes meet current regulatory requirements for hazardous substance restrictions.

Q: Which substitute offers the best long-term availability?

A: CD4040BM and CD4040BM96 (Texas Instruments) are recommended for long-term availability. Both are active products with high inventory levels (5,300 and 30,523 units respectively) and identical electrical specifications to the original CD4040BCM. These ensure consistent procurement and design continuity.

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