BU4081BFV-E2 Equivalent & Substitute Parts

Part Overview

The BU4081BFV-E2 is a 4-channel AND gate logic IC manufactured by Rohm Semiconductor in the 4000B series. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The BU4081BFV-E2 operates across a 3V to 16V supply voltage range and is packaged in a 14-LSSOP surface mount configuration. Identifying compatible alternatives ensures design continuity and maintains system functionality when the original part becomes unavailable.

Key Parameters

Parameter	Value
Logic Type	AND 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
Input Logic Level - Low	1.5V ~ 4V
Input Logic Level - High	4.6V ~ 11V
Max Propagation Delay @ V, Max CL	50ns @ 15V, 50pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-LSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the BU4081BFV-E2 are qualified based on the following criteria:

Functional Equivalence: All substitute parts must implement the same logic function (4-channel AND gate with 2 inputs per channel) as defined by the 4000B series standard.

Electrical Compatibility: Supply voltage range, input/output logic levels, and quiescent current must support operation within the original design parameters. The BU4081BFV-E2 operates at 3V to 16V; substitutes must accommodate this range or provide overlap.

Mechanical Compatibility: Surface mount packaging with 14-pin configuration and 0.173" width (4.40mm) ensures PCB footprint compatibility.

Compliance & Certification: All parts must maintain ROHS3 compliance and MSL Level 1 rating to ensure manufacturing and storage compatibility.

The identified substitutes (CD4081BPW and CD4081BPWR) meet these criteria while offering extended supply voltage ranges (3V to 18V) and improved temperature operating windows, providing design flexibility for future applications.

Parameter Comparison

Parameter	BU4081BFV-E2 (Rohm)	CD4081BPW (TI)	CD4081BPWR (TI)
Logic Type	AND Gate	AND Gate	AND Gate
Number of Circuits	4	4	4
Number of Inputs	2	2	2
Voltage - Supply	3V ~ 16V	3V ~ 18V	3V ~ 18V
Current - Quiescent (Max)	4 µA	1 µA	1 µA
Current - Output High, Low	1.2mA, 3mA	3.4mA, 3.4mA	3.4mA, 3.4mA
Input Logic Level - Low	1.5V ~ 4V	1.5V ~ 4V	1.5V ~ 4V
Input Logic Level - High	4.6V ~ 11V	4.6V ~ 11V	4.6V ~ 11V
Max Propagation Delay @ V, Max CL	50ns @ 15V, 50pF	90ns @ 15V, 50pF	90ns @ 15V, 50pF
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Supplier Device Package	14-SSOP-B	14-TSSOP	14-TSSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Discontinued at DiGi Electronics	Active

Engineering Selection Recommendations

CD4081BPWR (Texas Instruments) is the primary substitute for new designs and ongoing production. This part maintains active product status, ensuring long-term availability and supply chain stability. It provides ROHS3 compliance and MSL Level 1 rating identical to the original BU4081BFV-E2. The extended operating temperature range (-55°C to 125°C) and higher supply voltage ceiling (18V) offer design margin for demanding applications.

CD4081BPW (Texas Instruments) serves as a secondary substitute where specific packaging requirements (Tube) or inventory constraints necessitate an alternative. Although discontinued at DiGi Electronics, this part shares identical electrical specifications with CD4081BPWR and maintains full compliance certification.

Both Texas Instruments substitutes operate within the input/output logic level specifications of the original part and support the same 4-channel AND gate functionality. The extended supply voltage range (3V to 18V) accommodates the original 3V to 16V requirement with additional headroom.

Frequently Asked Questions (FAQ)

Q: Can CD4081BPW and CD4081BPWR be used interchangeably with BU4081BFV-E2?

A: Yes. Both parts implement identical 4-channel AND gate logic with matching input/output logic levels, quiescent current specifications, and compliance certifications. The primary difference is packaging format (Tube vs. Cut Tape & Digi-Reel) and product status.

Q: What is the difference between 14-SSOP-B and 14-TSSOP packaging?

A: Both are 14-pin surface mount packages with 0.173" width (4.40mm). SSOP-B and TSSOP are variant designations from different manufacturers. PCB footprints are mechanically compatible for this component category.

Q: Are there temperature operating range limitations when substituting?

A: The BU4081BFV-E2 operates from -40°C to 85°C. Both CD4081 substitutes extend this range to -55°C to 125°C. If your design operates within the original -40°C to 85°C window, both substitutes are fully compatible. Extended temperature capability does not restrict use in narrower temperature ranges.

Q: How do propagation delay differences affect circuit performance?

A: The BU4081BFV-E2 specifies 50ns maximum propagation delay at 15V with 50pF load. CD4081 substitutes specify 90ns under identical conditions. This 40ns difference is relevant only in timing-critical applications. For standard logic gate applications, both specifications meet typical design requirements.

Q: Is CD4081BPWR recommended for new designs?

A: Yes. CD4081BPWR maintains active product status, ensuring availability and supply chain continuity. It is the preferred choice for new designs and production quantities.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message