CD4001UBM NOR Gate IC Equivalent & Substitute Parts

Part Overview

The CD4001UBM is a 4-channel NOR gate logic IC manufactured by Texas Instruments, housed in a 14-SOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited availability. The CD4001UBM operates across a wide supply voltage range of 3V to 18V and is suitable for general-purpose digital logic applications requiring NOR gate functionality.

Substitute parts are necessary due to the Last Time Buy status of the CD4001UBM. Alternative equivalents from active product lines ensure design continuity and long-term component availability for new production runs and system maintenance.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	3V ~ 18V
Current - Quiescent (Max)	1 µA
Current - Output High, Low	3.4mA, 3.4mA
Input Logic Level - Low	1V ~ 2.5V
Input Logic Level - High	4V ~ 12.5V
Max Propagation Delay @ 15V, 50pF	50ns
Operating Temperature	-55°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Series	4000B
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the CD4001UBM is determined by the following critical parameters:

Functional Equivalence Requirements:

Logic Type: NOR Gate
Number of Circuits: 4
Number of Inputs: 2
Series: 4000B

Electrical Compatibility Requirements:

Voltage Supply Range: Must encompass or overlap with 3V ~ 18V
Operating Temperature: Must support -55°C ~ 125°C or equivalent industrial range
Input/Output Logic Levels: Must be compatible with standard CMOS logic thresholds
Propagation Delay: Must not exceed 80ns @ 15V, 50pF for timing-critical applications

Package Compatibility:

Mounting Type: Surface Mount
Package Family: 14-pin SOIC variants (0.154" or 0.173" width acceptable)

Substitute parts are grouped into two categories based on electrical performance alignment with the original CD4001UBM specification.

Parameter Comparison

Part Number	Manufacturer	Voltage Supply	Quiescent Current (Max)	Output Current High/Low	Propagation Delay @ 15V, 50pF	Operating Temp	Package	Product Status
CD4001UBM	Texas Instruments	3V ~ 18V	1 µA	3.4mA / 3.4mA	50ns	-55°C ~ 125°C	14-SOIC	Last Time Buy
CD4001UBM96	Texas Instruments	3V ~ 18V	1 µA	3.4mA / 3.4mA	50ns	-55°C ~ 125°C	14-SOIC	Active
MC14001UBDG	onsemi	3V ~ 18V	1 µA	4.6mA / 8.8mA	80ns	-55°C ~ 125°C	14-SOIC	Active
MC14001BDG	onsemi	3V ~ 18V	1 µA	8.8mA / 8.8mA	80ns	-55°C ~ 125°C	14-SOIC	Active
MC14001BDR2G	onsemi	3V ~ 18V	1 µA	8.8mA / 8.8mA	80ns	-55°C ~ 125°C	14-SOIC	Active
HEC4001BT,112	NXP USA Inc.	3V ~ 15V	1 µA	3.4mA / 3.4mA	40ns	-40°C ~ 125°C	14-SOIC	Active
HEC4001BT,118	NXP USA Inc.	3V ~ 15V	1 µA	3.4mA / 3.4mA	40ns	-40°C ~ 125°C	14-SOIC	Active
HEF4001BT,652	Nexperia USA Inc.	3V ~ 15V	1 µA	3.4mA / 3.4mA	40ns	-40°C ~ 125°C	14-SOIC	Obsolete
HEF4001BT,653	Nexperia USA Inc.	3V ~ 15V	1 µA	3.4mA / 3.4mA	40ns	-40°C ~ 15V	14-SOIC	Active
HEF4001BT-Q100J	Nexperia USA Inc.	3V ~ 15V	1 µA	3.4mA / 3.4mA	40ns	-40°C ~ 125°C	14-SOIC	Active
BU4001BF-E2	Rohm Semiconductor	3V ~ 16V	4 µA	1.2mA / 3mA	40ns	-40°C ~ 85°C	14-SOP	Not For New Designs

Engineering Selection Recommendations

Primary Recommendation: CD4001UBM96

The CD4001UBM96 is the direct functional equivalent from Texas Instruments, differing only in packaging format (Tape & Reel versus Tube). Electrical specifications are identical to the original CD4001UBM. This part maintains Active product status with substantial inventory availability (35,046 units), ensuring long-term supply continuity. Selection of this part eliminates any design re-qualification requirements.

Secondary Recommendations (onsemi MC14001 Series)

The MC14001UBDG and MC14001BDG variants from onsemi provide full functional equivalence with identical voltage supply range (3V ~ 18V) and operating temperature span (-55°C ~ 125°C). Both parts maintain Active status. The MC14001UBDG exhibits output current characteristics closest to the original specification (4.6mA / 8.8mA). Propagation delay increases to 80ns, acceptable for non-timing-critical applications. High inventory levels (830 and 100,199 units respectively) support production requirements.

Alternative Recommendations (NXP/Nexperia HEC/HEF Series)

The HEC4001BT,112 and HEC4001BT,118 variants from NXP, along with HEF4001BT,653 and HEF4001BT-Q100J from Nexperia, provide functional NOR gate equivalence with reduced maximum supply voltage (3V ~ 15V). These parts are unsuitable for applications requiring the full 18V supply capability of the original CD4001UBM. Operating temperature range is reduced to -40°C minimum. Propagation delay improves to 40ns. The HEF4001BT-Q100J carries AEC-Q100 automotive qualification, suitable for automotive-grade applications.

Not Recommended: BU4001BF-E2

The BU4001BF-E2 from Rohm Semiconductor carries Not For New Designs status and exhibits reduced operating temperature range (-40°C ~ 85°C), lower maximum supply voltage (3V ~ 16V), and reduced output current capability (1.2mA / 3mA). This part is unsuitable for new designs.

Not Recommended: HEF4001BT,652

The HEF4001BT,652 is classified as Obsolete and should not be selected for new production.

Frequently Asked Questions (FAQ)

Q: Can the CD4001UBM96 be used as a direct replacement for CD4001UBM?

A: Yes. The CD4001UBM96 is electrically identical to the CD4001UBM. The only difference is packaging format: CD4001UBM is supplied in Tube packaging, while CD4001UBM96 is supplied in Tape & Reel format. Both are 14-SOIC surface mount packages with identical pinout and electrical performance.

Q: What is the key difference between the onsemi MC14001 variants?

A: The MC14001UBDG and MC14001BDG differ in output current specifications. The MC14001UBDG provides asymmetrical output current (4.6mA high / 8.8mA low), while MC14001BDG provides symmetrical output current (8.8mA high / 8.8mA low). Both maintain identical supply voltage range and operating temperature. Selection depends on output drive requirements for specific logic loads.

Q: Why do NXP and Nexperia parts have reduced maximum supply voltage?

A: The HEC4001 and HEF4001 series are specified for maximum 15V supply, compared to 18V for the CD4001UBM and MC14001 series. Applications requiring operation above 15V must use CD4001UBM96 or MC14001 variants. Applications operating within 3V ~ 15V range may use either family.

Q: Is the BU4001BF-E2 suitable for new designs?

A: No. The BU4001BF-E2 carries Not For New Designs status and exhibits reduced operating temperature range (-40°C ~ 85°C) and lower output current capability. New designs should select CD4001UBM96, MC14001UBDG, or MC14001BDG.

Q: What does AEC-Q100 qualification mean for the HEF4001BT-Q100J?

A: AEC-Q100 is an automotive industry qualification standard. The HEF4001BT-Q100J meets automotive-grade reliability and testing requirements. This part is suitable for automotive applications requiring qualified components. Non-automotive applications may use any Active-status part from the comparison table.

Q: Can I use HEF4001BT,652 in production?

A: No. The HEF4001BT,652 is classified as Obsolete. Use Active-status alternatives: HEF4001BT,653 or HEF4001BT-Q100J from Nexperia, or CD4001UBM96 and MC14001 variants from other manufacturers.

Q: What is the significance of propagation delay differences?

A: Propagation delay determines the maximum switching speed. The CD4001UBM specifies 50ns, while onsemi MC14001 variants specify 80ns, and NXP/Nexperia variants specify 40ns. For timing-critical applications with tight delay budgets, verify that substitute part propagation delay does not exceed system requirements. The 40ns specification of NXP/Nexperia parts provides faster switching than the original.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed in the comparison table carry ROHS3 Compliant status, meeting environmental and hazardous substance restrictions for commercial and industrial applications.

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