CD4011BCSJ Equivalent & Substitute Parts

Part Overview

The CD4011BCSJ is a NAND Gate IC with 4 channels and 2 inputs per channel, manufactured by onsemi in a 14-SOP package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design requirements and production needs. The CD4011BCSJ belongs to the 4000B logic series and operates across a supply voltage range of 3V to 15V with a maximum propagation delay of 70ns at 15V with 50pF load.

Key Parameters

Parameter	Value
Logic Type	NAND Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	3V ~ 15V
Current - Quiescent (Max)	1 µA
Current - Output High, Low	3.4mA, 3.4mA
Input Logic Level - Low	1.5V ~ 4V
Input Logic Level - High	4.6V ~ 11V
Max Propagation Delay @ 15V, 50pF	70ns
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD4011BCSJ is determined by the following critical parameters:

Logic Function: All substitutes must implement a 4-channel, 2-input NAND gate
Supply Voltage Range: Substitutes must support the required operating voltage window
Input/Output Logic Levels: Substitutes must meet or exceed the specified threshold voltages
Propagation Delay: Substitutes must satisfy timing requirements for the application
Operating Temperature Range: Substitutes must cover the required temperature extremes
Package Compatibility: Physical and electrical compatibility with the PCB layout
Mounting Type: Surface mount requirement must be maintained

Substitute parts are grouped into two categories based on electrical parameter compatibility:

Group 1 - Direct Electrical Equivalents (CD4011BM, CD4011BM96, CD4011BME4, CD4011BMT): These Texas Instruments parts maintain the same logic function, 4-channel 2-input configuration, and core electrical characteristics. Supply voltage extends to 18V, providing broader operating range. Propagation delay is 90ns at 15V with 50pF load. Input logic levels remain consistent with the main part.

Group 2 - Enhanced Performance Variants (CD4011UBM, CD4011UBM96, CD4011UBMT, CD4011UBNSR): These Texas Instruments parts offer improved propagation delay of 50ns at 15V with 50pF load and modified input logic level thresholds (1V ~ 2.5V for low, 4V ~ 12.5V for high). Supply voltage range extends to 18V.

Group 3 - Alternative Manufacturer (HEF4011BT,653): This Nexperia part provides the same functional specification as the main part with identical supply voltage range (3V ~ 15V) and improved propagation delay of 35ns at 15V with 50pF load.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Circuits / Inputs	Supply Voltage	Quiescent Current (Max)	Output Current (High/Low)	Propagation Delay @ 15V, 50pF	Operating Temperature	Package	Product Status
CD4011BCSJ	onsemi	NAND Gate	4 / 2	3V ~ 15V	1 µA	3.4mA / 3.4mA	70ns	-55°C ~ 125°C	14-SOIC (0.209", 5.30mm)	Obsolete
CD4011BM	Texas Instruments	NAND Gate	4 / 2	3V ~ 18V	1 µA	3.4mA / 3.4mA	90ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Active
CD4011BM96	Texas Instruments	NAND Gate	4 / 2	3V ~ 18V	1 µA	3.4mA / 3.4mA	90ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Active
CD4011BME4	Texas Instruments	NAND Gate	4 / 2	3V ~ 18V	1 µA	3.4mA / 3.4mA	90ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Discontinued at DiGi Electronics
CD4011BMT	Texas Instruments	NAND Gate	4 / 2	3V ~ 18V	1 µA	3.4mA / 3.4mA	90ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Discontinued at DiGi Electronics
CD4011UBM	Texas Instruments	NAND Gate	4 / 2	3V ~ 18V	1 µA	3.4mA / 3.4mA	50ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Last Time Buy
CD4011UBM96	Texas Instruments	NAND Gate	4 / 2	3V ~ 18V	1 µA	3.4mA / 3.4mA	50ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Active
CD4011UBMT	Texas Instruments	NAND Gate	4 / 2	3V ~ 18V	1 µA	3.4mA / 3.4mA	50ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Last Time Buy
CD4011UBNSR	Texas Instruments	NAND Gate	4 / 2	3V ~ 18V	1 µA	3.4mA / 3.4mA	50ns	-55°C ~ 125°C	14-SOIC (0.209", 5.30mm)	Active
HEF4011BT,653	Nexperia USA Inc.	NAND Gate	4 / 2	3V ~ 15V	1 µA	3.4mA / 3.4mA	35ns	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Active

Engineering Selection Recommendations

For Active Production (Recommended Primary Choices)

CD4011UBM96 and CD4011UBNSR are the preferred substitutes. Both are active products from Texas Instruments with extended supply voltage range (3V ~ 18V), improved propagation delay of 50ns, and full temperature range coverage (-55°C ~ 125°C). CD4011UBM96 is available in standard 14-SOIC (0.154", 3.90mm) package, while CD4011UBNSR maintains the original package width (0.209", 5.30mm), providing direct physical compatibility with existing PCB layouts designed for the CD4011BCSJ.

For Timing-Critical Applications

HEF4011BT,653 from Nexperia offers the fastest propagation delay at 35ns, meeting stringent timing requirements. This part maintains the original supply voltage specification (3V ~ 15V) and is actively produced. Note that the operating temperature range is -40°C ~ 125°C, which is narrower than the CD4011BCSJ specification.

For Extended Supply Voltage Requirements

CD4011BM and CD4011BM96 extend the supply voltage range to 18V while maintaining compatibility with the original logic levels and output current specifications. Both are active products from Texas Instruments.

Avoid for New Designs

CD4011BME4, CD4011BMT, CD4011UBM, and CD4011UBMT are discontinued or last-time-buy status and should not be selected for new production designs.

Frequently Asked Questions (FAQ)

Q: Can CD4011UBNSR be used as a direct replacement for CD4011BCSJ without PCB modifications?

A: Yes. CD4011UBNSR maintains the same package width (0.209", 5.30mm) as the CD4011BCSJ, providing direct physical compatibility. The electrical parameters are compatible with the original specification, and the improved propagation delay of 50ns is a performance enhancement.

Q: What is the difference between CD4011UBM96 and CD4011UBNSR?

A: Both parts are functionally equivalent with identical electrical specifications. The primary difference is packaging: CD4011UBM96 uses a standard 14-SOIC (0.154", 3.90mm) package, while CD4011UBNSR uses a 14-SOIC (0.209", 5.30mm) package. Package selection depends on PCB layout requirements.

Q: Why does HEF4011BT,653 have a narrower operating temperature range?

A: HEF4011BT,653 is specified for -40°C ~ 125°C, which is narrower than the CD4011BCSJ range of -55°C ~ 125°C. This part is suitable only for applications that do not require operation below -40°C.

Q: Are all substitute parts RoHS compliant?

A: Yes. All Texas Instruments and Nexperia substitute parts listed are ROHS3 compliant. The original CD4011BCSJ does not specify RoHS status in the provided data.

Q: What is the significance of the propagation delay difference between CD4011BM (90ns) and CD4011UBM (50ns)?

A: The CD4011UBM series offers faster signal propagation, which is beneficial for timing-sensitive applications. The 40ns improvement may eliminate timing margin issues in designs operating near maximum frequency limits. However, both specifications are within the 4000B series standard performance envelope.

Q: Can I mix different substitute parts in the same design?

A: All listed substitutes are functionally equivalent and can be used interchangeably within the same circuit. However, for production consistency and supply chain management, it is recommended to standardize on a single part number per design revision.

Q: What packaging options are available for active substitute parts?

A: Active substitutes are available in the following packaging configurations: Tube (CD4011BM), Cut Tape & Digi-Reel (CD4011BM96), Tape & Reel (CD4011UBM96, CD4011UBNSR, HEF4011BT,653), and Cut Tape (CD4011UBMT). Selection depends on production volume and supply chain requirements.

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