CD4001UBNSR NOR Gate IC Equivalent & Substitute Parts

Part Overview

The CD4001UBNSR is a 4-channel NOR gate logic IC manufactured by Texas Instruments in the 4000B series. This component features dual-input NOR gates in a 14-SO surface mount package, operating across a wide supply voltage range of 3V to 18V. The part is classified as obsolete, making substitute components necessary for new designs and ongoing production support. Alternative parts maintain functional equivalence while offering improved availability and updated product status classifications.

Key Parameters

Parameter	CD4001UBNSR
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	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
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD4001UBNSR is determined by strict equivalence in the following critical parameters:

Logic function: 4-channel NOR gate with 2 inputs per gate
Supply voltage range compatibility: Minimum 3V, maximum 15V or higher
Quiescent current: Maximum 1 µA to 4 µA
Output current capability: Minimum 1.2mA per output
Propagation delay: Maximum 80ns at 15V with 50pF load
Operating temperature range: Minimum -40°C to -55°C lower bound, maximum 85°C to 125°C upper bound
Surface mount packaging: 14-SOIC configuration
Compliance: ROHS3 compliant, MSL 1 rating

Substitute parts are grouped by manufacturer and product status. Parts with active status are prioritized for new designs. Package width variations (0.154", 0.173", 0.209", 5.30mm) are noted as they affect PCB layout compatibility.

Parameter Comparison

Parameter	CD4001UBNSR (TI)	BU4001BF-E2 (Rohm)	HEC4001BT,112 (NXP)	HEC4001BT,118 (NXP)	HEF4001BT,652 (Nexperia)	HEF4001BT,653 (Nexperia)	MC14001BDG (onsemi)	MC14001BDR2G (onsemi)	TC4001BF(EL,N,F) (Toshiba)
Logic Type	NOR Gate	NOR Gate	NOR Gate	NOR Gate	NOR Gate	NOR Gate	NOR Gate	NOR Gate	NOR Gate
Number of Circuits	4	4	4	4	4	4	4	4	4
Number of Inputs	2	2	2	2	2	2	2	2	2
Voltage - Supply	3V ~ 18V	3V ~ 16V	3V ~ 15V	3V ~ 15V	3V ~ 15V	3V ~ 15V	3V ~ 18V	3V ~ 18V	3V ~ 18V
Current - Quiescent (Max)	1 µA	4 µA	1 µA	1 µA	1 µA	1 µA	1 µA	1 µA	1 µA
Current - Output High, Low	3.4mA, 3.4mA	1.2mA, 3mA	3.4mA, 3.4mA	3.4mA, 3.4mA	3.4mA, 3.4mA	3.4mA, 3.4mA	8.8mA, 8.8mA	8.8mA, 8.8mA	3.4mA, 3.4mA
Input Logic Level - Low	1V ~ 2.5V	1.5V ~ 4V	1.5V ~ 4V	1.5V ~ 4V	1.5V ~ 4V	1.5V ~ 4V	1.5V ~ 4V	1.5V ~ 4V	1.5V ~ 4V
Input Logic Level - High	4V ~ 12.5V	4.6V ~ 11V	4.6V ~ 11V	4.6V ~ 11V	4.6V ~ 11V	4.6V ~ 11V	4.6V ~ 11V	4.6V ~ 11V	4.6V ~ 11V
Max Propagation Delay @ 15V, 50pF	50ns	40ns	40ns	40ns	40ns	40ns	80ns	80ns	80ns
Operating Temperature	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°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	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.209", 5.30mm)
Product Status	Obsolete	Not For New Designs	Active	Active	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For new designs, select from parts with Active product status: HEC4001BT,112, HEC4001BT,118, HEF4001BT,653, MC14001BDG, MC14001BDR2G, or TC4001BF(EL,N,F). All substitute parts maintain ROHS3 compliance and MSL 1 ratings, ensuring environmental and moisture handling compatibility with the original CD4001UBNSR.

NXP HEC4001BT variants and Nexperia HEF4001BT,653 provide the closest electrical match with identical output current specifications (3.4mA) and extended temperature range support (-40°C to 125°C). onsemi MC14001 series offers higher output current capability (8.8mA) suitable for applications requiring increased drive strength. Toshiba TC4001BF(EL,N,F) matches the original package width (0.209", 5.30mm) for direct PCB layout compatibility without redesign.

For legacy system maintenance where the original CD4001UBNSR is unavailable, HEF4001BT,652 (Nexperia, Obsolete status) or BU4001BF-E2 (Rohm, Not For New Designs) provide functional equivalence with established supply chains. Temperature range limitations apply: BU4001BF-E2 and TC4001BF(EL,N,F) operate to 85°C maximum, restricting use in extended temperature applications.

Frequently Asked Questions (FAQ)

Q: Can MC14001BDG replace CD4001UBNSR in all applications?

A: MC14001BDG is functionally equivalent for logic operation. However, output current is higher (8.8mA vs. 3.4mA), which may affect circuit behavior in current-limited designs. Verify that downstream components tolerate increased drive current.

Q: What is the significance of package width differences (0.154", 0.173", 0.209")?

A: Package width affects PCB footprint spacing. The original CD4001UBNSR uses 0.209" width. Substitutes with 0.154" or 0.173" width require PCB layout verification to confirm pin-to-pin spacing compatibility. Toshiba TC4001BF(EL,N,F) and BU4001BF-E2 maintain wider packages for direct layout compatibility.

Q: Why do some substitutes have lower maximum operating temperature?

A: BU4001BF-E2 and TC4001BF(EL,N,F) are rated to 85°C maximum, compared to CD4001UBNSR at 125°C. Applications requiring extended temperature operation must use HEC4001BT, HEF4001BT,653, or MC14001 series, all rated to 125°C.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes carry ROHS3 compliance certification. Toshiba TC4001BF(EL,N,F) carries RoHS Compliant status, which is equivalent for environmental compliance purposes.

Q: What is the difference between HEC4001BT,112 and HEC4001BT,118?

A: Both are NXP Active parts with identical electrical specifications and temperature range (-40°C to 125°C). The suffix difference (,112 vs. ,118) indicates packaging or tape configuration variants. Electrical performance is equivalent.

Q: Can I use HEF4001BT,653 as a direct replacement for CD4001UBNSR?

A: Yes. HEF4001BT,653 is Active status with matching output current (3.4mA), extended temperature range (-40°C to 125°C), and ROHS3 compliance. Package width is 0.154" (3.90mm) versus original 0.209" (5.30mm), requiring PCB footprint verification.

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

A: HEF4001BT,653 (Nexperia) and MC14001BDG (onsemi) both carry Active product status with high inventory levels (93,988 and 100,199 units respectively), indicating established production and supply continuity.

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