CD4002BM NOR Gate IC Equivalent & Substitute Parts

Part Overview

The CD4002BM is a 2-channel NOR gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This device implements four-input NOR gate logic functions and operates across a wide supply voltage range of 3V to 18V. The CD4002BM is designated as Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	2
Number of Inputs	4
Voltage - Supply	3V ~ 18V
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 @ V, Max CL	90ns @ 15V, 50pF
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Series	4000B
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD4002BM is determined by the following critical parameters:

Logic function: 2-channel NOR gate with 4 inputs per channel
Supply voltage range: Minimum 3V to 18V operation
Output current capability: 3.4mA high and low
Input logic thresholds: Low 1.5V ~ 4V, High 4.6V ~ 11V
Propagation delay: 90ns maximum at 15V with 50pF load
Operating temperature range: -55°C to 125°C
Package: 14-SOIC surface mount form factor
Compliance: ROHS3 and REACH requirements

Substitute parts must maintain compatibility across all these parameters. Variations in propagation delay, quiescent current, or operating temperature range may affect system performance and must be evaluated against application requirements.

Parameter Comparison

Parameter	CD4002BM	CD4002BM96	HEC4002BT,112	HEC4002BT,118	HEF4002BT,652
Manufacturer	Texas Instruments	Texas Instruments	NXP USA Inc.	NXP USA Inc.	Nexperia USA Inc.
Logic Type	NOR Gate	NOR Gate	NOR Gate	NOR Gate	NOR Gate
Number of Circuits	2	2	2	2	2
Number of Inputs	4	4	4	4	4
Voltage - Supply	3V ~ 18V	3V ~ 18V	3V ~ 15V	3V ~ 15V	3V ~ 15V
Current - Quiescent (Max)	1 µA	1 µA	1 µA	1 µA	4 µA
Current - Output High, Low	3.4mA, 3.4mA	3.4mA, 3.4mA	3.4mA, 3.4mA	3.4mA, 3.4mA	3mA, 3mA
Input Logic Level - Low	1.5V ~ 4V	1.5V ~ 4V	1.5V ~ 4V	1.5V ~ 4V	1.5V ~ 4V
Input Logic Level - High	4.6V ~ 11V	4.6V ~ 11V	4.6V ~ 11V	4.6V ~ 11V	4.6V ~ 11V
Max Propagation Delay @ V, Max CL	90ns @ 15V, 50pF	90ns @ 15V, 50pF	40ns @ 15V, 50pF	40ns @ 15V, 50pF	40ns @ 15V, 50pF
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Series	4000B	4000B	4000B	4000B	4000B
Product Status	Last Time Buy	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

CD4002BM96 (Texas Instruments) is the primary substitute. This part maintains identical electrical specifications and operating parameters while offering Active product status and improved availability. The packaging format differs (Tape & Reel versus Tube), but the 14-SOIC form factor remains compatible.

HEC4002BT,112 and HEC4002BT,118 (NXP USA Inc.) are functionally equivalent alternatives. Both parts feature improved propagation delay performance (40ns versus 90ns) and maintain Active status. The maximum supply voltage is limited to 15V compared to the CD4002BM's 18V rating. These parts are suitable for applications operating within the 3V to 15V range.

HEF4002BT,652 (Nexperia USA Inc.) is designated Obsolete and carries higher quiescent current (4 µA versus 1 µA) and reduced output current capability (3mA versus 3.4mA). The operating temperature range is also narrower (-40°C to 85°C). This part is not recommended for new designs.

Selection should prioritize CD4002BM96 for direct replacement. NXP alternatives are acceptable where the reduced supply voltage range and improved speed do not conflict with application requirements.

Frequently Asked Questions (FAQ)

Q: Can CD4002BM96 directly replace CD4002BM in existing designs?

A: Yes. CD4002BM96 maintains identical electrical specifications, logic function, and 14-SOIC packaging. The primary difference is packaging format (Tape & Reel versus Tube), which does not affect circuit performance.

Q: What is the key difference between CD4002BM and HEC4002BT variants?

A: The HEC4002BT parts offer faster propagation delay (40ns versus 90ns) but operate at a maximum supply voltage of 15V instead of 18V. Applications requiring operation above 15V must use CD4002BM or CD4002BM96.

Q: Why is HEF4002BT,652 not recommended?

A: HEF4002BT,652 is designated Obsolete with degraded electrical characteristics: higher quiescent current (4 µA), reduced output current (3mA), and narrower operating temperature range (-40°C to 85°C). New designs should not incorporate this part.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), matching the original CD4002BM specifications.

Q: Can NXP HEC4002BT parts be used in high-temperature applications?

A: Yes. HEC4002BT,112 and HEC4002BT,118 support the full -55°C to 125°C operating temperature range, equivalent to CD4002BM. Temperature range is not a limiting factor for substitution.

Q: What packaging options are available for CD4002BM substitutes?

A: CD4002BM96 is available in Tape & Reel (TR) and Cut Tape (CT) formats. All substitute parts maintain the 14-SOIC (0.154", 3.90mm Width) surface mount package, ensuring PCB compatibility.

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