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BU4001BF-E2 Equivalent & Substitute Parts
Part Overview
The BU4001BF-E2 is a NOR Gate IC with 4 channels and 2 inputs per channel, manufactured by Rohm Semiconductor in a 14-SOP package. This logic gate operates across a supply voltage range of 3V to 16V with a maximum propagation delay of 40ns at 15V with 50pF load. The part is marked as Not For New Designs, making equivalent and substitute parts necessary for ongoing production and maintenance applications where the BU4001BF-E2 may become unavailable or where design flexibility is required.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Logic Type | NOR Gate |
| Number of Circuits | 4 |
| Number of Inputs | 2 |
| Voltage - Supply | 3V ~ 16V |
| Current - Quiescent (Max) | 4 µA |
| Current - Output High, Low | 1.2mA, 3mA |
| Max Propagation Delay @ 15V, 50pF | 40ns |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 14-SOIC (0.173", 4.40mm Width) |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution for the BU4001BF-E2 is determined by the following critical parameters:
- Logic Type: NOR Gate with 4 channels and 2 inputs per channel
- Supply Voltage Range: Must support minimum 3V and accommodate the BU4001BF-E2 operating range up to 16V
- Package Compatibility: 14-SOIC form factor for surface mount assembly
- Propagation Delay: Maximum 40ns at 15V with 50pF load for timing-critical applications
- Operating Temperature: Minimum -40°C to 85°C coverage
- Compliance: ROHS3 compliance and EAR99 classification
Substitute parts are grouped into two categories based on electrical performance and package specifications:
Category A - Direct Electrical Equivalents (CD4001 Series): Parts with identical logic configuration, matching or superior propagation delay characteristics, and compatible supply voltage ranges. These include CD4001BM, CD4001BM96, CD4001BMT, CD4001UBM, CD4001UBM96, and CD4001UBMT from Texas Instruments and Harris Corporation.
Category B - Compatible Alternatives (HEC/HEF4001 Series): Parts with identical logic configuration and package form factor from NXP and Nexperia, offering equivalent or superior performance characteristics with different manufacturer implementations.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Supply | Current - Quiescent (Max) | Max Propagation Delay @ 15V, 50pF | Operating Temperature | Package / Case | Product Status |
|---|---|---|---|---|---|---|---|
| BU4001BF-E2 | Rohm Semiconductor | 3V ~ 16V | 4 µA | 40ns | -40°C ~ 85°C | 14-SOIC (0.173", 4.40mm) | Not For New Designs |
| CD4001BM | Texas Instruments | 3V ~ 18V | 1 µA | 90ns | -55°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | Active |
| CD4001BM96 | Harris Corporation | 3V ~ 18V | 1 µA | 90ns | -55°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | Active |
| CD4001BMT | Texas Instruments | 3V ~ 18V | 1 µA | 90ns | -55°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | Discontinued at DiGi Electronics |
| CD4001UBM | Texas Instruments | 3V ~ 18V | 1 µA | 50ns | -55°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | Last Time Buy |
| CD4001UBM96 | Texas Instruments | 3V ~ 18V | 1 µA | 50ns | -55°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | Active |
| CD4001UBMT | Texas Instruments | 3V ~ 18V | 1 µA | 50ns | -55°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | Discontinued at DiGi Electronics |
| HEC4001BT,112 | NXP USA Inc. | 3V ~ 15V | 1 µA | 40ns | -40°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | Active |
| HEC4001BT,118 | NXP USA Inc. | 3V ~ 15V | 1 µA | 40ns | -40°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | Active |
| HEF4001BT,652 | Nexperia USA Inc. | 3V ~ 15V | 1 µA | 40ns | -40°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | Obsolete |
| HEF4001BT,653 | Nexperia USA Inc. | 3V ~ 15V | 1 µA | 40ns | -40°C ~ 125°C | 14-SOIC (0.154", 3.90mm) | Active |
Engineering Selection Recommendations
For applications requiring direct replacement of the BU4001BF-E2, the HEC4001BT,112 and HEF4001BT,653 from NXP and Nexperia respectively are the primary recommendations. Both parts match the 40ns propagation delay specification, maintain the -40°C lower operating temperature bound, and are currently in Active product status with ROHS3 compliance and EAR99 classification.
The CD4001UBM96 from Texas Instruments provides an alternative with superior propagation delay performance (50ns) and extended operating temperature range (-55°C to 125°C), though it operates at a reduced maximum supply voltage of 18V compared to the BU4001BF-E2's 16V specification. This part is in Active status with full compliance certifications.
Parts marked as Discontinued at DiGi Electronics (CD4001BMT, CD4001UBMT) or Last Time Buy (CD4001UBM) should be avoided for new procurement unless existing inventory is available and supply chain continuity is not a concern.
The HEF4001BT,652 is marked as Obsolete and should not be selected for new applications.
Frequently Asked Questions (FAQ)
Q: Can I use CD4001BM as a direct replacement for BU4001BF-E2?
A: CD4001BM is functionally equivalent as a 4-channel NOR gate in a 14-SOIC package. However, it has a propagation delay of 90ns compared to the BU4001BF-E2's 40ns. This slower response time may impact timing-critical applications. The part is in Active status and ROHS3 compliant.
Q: What is the difference between CD4001UBM96 and CD4001BM96?
A: Both are 4-channel NOR gates in 14-SOIC packages from the CD4001 series. The CD4001UBM96 has a faster propagation delay of 50ns versus 90ns for CD4001BM96, and different input logic level specifications. CD4001UBM96 is in Active status while CD4001BM96 is also Active.
Q: Are HEC4001BT and HEF4001BT parts interchangeable?
A: HEC4001BT parts are from NXP USA Inc., while HEF4001BT parts are from Nexperia USA Inc. Both are 4-channel NOR gates with 40ns propagation delay and 14-SOIC packaging. They are functionally equivalent, though HEC4001BT variants are in Active status while HEF4001BT,652 is Obsolete and HEF4001BT,653 is Active.
Q: Does the package width difference between 0.173" and 0.154" affect PCB compatibility?
A: The BU4001BF-E2 uses a 14-SOIC package with 0.173" width, while most substitute parts use 0.154" width. Both are standard 14-SOIC form factors. PCB footprint compatibility depends on the specific design tolerance. Verify your PCB layout accommodates the narrower 0.154" width before substitution.
Q: Which substitute part has the best long-term availability?
A: CD4001UBM96 and HEF4001BT,653 are both in Active product status, indicating ongoing production and availability. These are the recommended choices for applications requiring long-term supply chain stability.
Q: Can I use a substitute part with a higher maximum supply voltage?
A: Yes. The CD4001 series parts rated for 3V ~ 18V can operate safely in applications designed for the BU4001BF-E2's 3V ~ 16V range. The higher voltage rating provides additional design margin without affecting performance in the lower voltage range.
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