BU4001B NOR Gate IC Equivalent & Substitute Parts

Part Overview

The BU4001B is a 4-channel NOR gate logic IC manufactured by Rohm Semiconductor in 14-DIP packaging. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The BU4001B operates across a wide supply voltage range (3V to 16V) and is suitable for general-purpose logic applications requiring NOR gate functionality with through-hole mounting.

Substiute Parts

BU4001B

Rohm SemiconductorIn Stock: 808BU4001B Datasheet

Current PartRFQ

CD4001BE

Texas InstrumentsIn Stock: 17613CD4001BE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BU4001B is determined by the following critical parameters:

• Logic Function: Both parts must implement 4-channel, 2-input NOR gate logic
• Package Type: Physical compatibility requires 14-DIP (0.300", 7.62mm) through-hole packaging
• Supply Voltage Range: The substitute must operate within or encompass the 3V to 16V range
• Input/Output Logic Levels: Threshold voltages must be compatible for direct circuit integration
• Operating Temperature Range: The substitute must support the required temperature extremes
• Electrical Characteristics: Propagation delay, quiescent current, and output drive capability must be suitable for the application

The CD4001BE from Texas Instruments meets these substitution criteria as an active-status alternative with compatible logic function, package type, and electrical performance within acceptable parameters.

Parameter Comparison

Engineering Selection Recommendations

The CD4001BE is a direct functional substitute for the BU4001B based on the following factors:

• Product Status: The BU4001B is obsolete, while the CD4001BE is active and available in production quantities (17,600 pcs in stock)
• Regulatory Compliance: Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental standards
• Electrical Performance: The CD4001BE provides equivalent or superior electrical characteristics, including lower quiescent current (1 µA vs. 4 µA) and higher output drive capability (3.4mA vs. 1.2mA/3mA)
• Package Compatibility: Identical 14-DIP through-hole packaging ensures direct PCB compatibility without layout modifications
• Temperature Range: The CD4001BE supports an extended operating temperature range (-55°C to 125°C), providing greater flexibility for diverse applications

Frequently Asked Questions (FAQ)

Q: Can the CD4001BE be used as a direct replacement for the BU4001B without circuit modifications?

A: Yes. Both parts share identical logic function (4-channel 2-input NOR gate), package type (14-DIP), and input/output logic levels. Direct pin-for-pin substitution is possible without circuit redesign.

Q: What are the key differences between these parts?

A: The CD4001BE offers lower quiescent current (1 µA vs. 4 µA), higher output drive capability (3.4mA vs. 1.2mA/3mA), and a wider operating temperature range (-55°C to 125°C vs. -40°C to 85°C). Propagation delay is longer in the CD4001BE (90ns vs. 40ns at 15V, 50pF).

Q: Is the CD4001BE suitable for high-speed applications?

A: The CD4001BE has a maximum propagation delay of 90ns at 15V with 50pF load, compared to 40ns for the BU4001B. Applications requiring propagation delays below 90ns should evaluate timing requirements against the CD4001BE specification.

Q: Are there any supply voltage considerations when substituting?

A: The CD4001BE operates across 3V to 18V, which encompasses the BU4001B range of 3V to 16V. Both parts are compatible across standard logic supply voltages (5V, 12V, 15V).

Q: What is the packaging format for the CD4001BE?

A: The CD4001BE is supplied in 14-PDIP (plastic dual in-line package) with 0.300" (7.62mm) pitch, identical to the BU4001B 14-DIP package. Through-hole mounting is used for both parts.