CD4071BCN Equivalent & Substitute Parts

Part Overview

The CD4071BCN is a 4-channel OR gate logic IC manufactured by onsemi in 14-MDIP packaging. This device implements four independent 2-input OR gates on a single integrated circuit, operating across a supply voltage range of 3V to 15V. The CD4071BCN is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

CD4071BCN

onsemiIn Stock: 3474CD4071BCN Datasheet

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CD4071BE

Texas InstrumentsIn Stock: 2233CD4071BE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD4071BCN is determined by strict equivalence across the following critical parameters:

• Logic function: 4-channel, 2-input OR gate configuration
• Supply voltage range: Minimum 3V to 15V compatibility
• Output current capability: 3.4mA high and low
• Input logic thresholds: Low 1.5V ~ 4V, High 4.6V ~ 11V
• Propagation delay: Maximum 70ns at 15V with 50pF load
• Operating temperature range: -55°C ~ 125°C
• Package type: 14-DIP through-hole mounting
• Series classification: 4000B logic family

The CD4071BE from Texas Instruments meets all functional and electrical requirements for direct substitution while maintaining identical pin configuration and package dimensions.

Parameter Comparison

Engineering Selection Recommendations

The CD4071BE from Texas Instruments is the direct functional equivalent for the obsolete CD4071BCN. Both devices implement identical logic architecture with matching pin configurations and package dimensions, enabling direct board-level substitution without circuit redesign.

The CD4071BE offers extended supply voltage range (3V ~ 18V versus 3V ~ 15V) and maintains active product status with ROHS3 compliance, providing improved long-term availability and regulatory alignment. Propagation delay at 15V is 90ns compared to 70ns for the CD4071BCN; this difference remains within acceptable margins for most 4000B series applications given the quiescent current and output drive characteristics remain identical.

Frequently Asked Questions (FAQ)

Q: Can the CD4071BE directly replace the CD4071BCN without PCB modifications?

A: Yes. Both devices use identical 14-DIP package dimensions (0.300", 7.62mm) and pin configuration. Direct socket substitution is possible without PCB layout changes.

Q: What is the primary difference between these two parts?

A: The CD4071BE has extended maximum supply voltage (18V versus 15V) and slightly higher propagation delay (90ns versus 70ns at 15V, 50pF load). All other electrical parameters are equivalent.

Q: Why is the CD4071BCN listed as obsolete?

A: Obsolescence reflects onsemi's discontinuation of this specific part number. The CD4071BE remains in active production from Texas Instruments, ensuring continued availability.

Q: Are there any compliance differences between these parts?

A: The CD4071BE carries ROHS3 compliance certification. The CD4071BCN does not specify RoHS status. Both are REACH Unaffected and classified as EAR99.

Q: Does the 20ns propagation delay difference affect circuit performance?

A: The 20ns difference (70ns to 90ns) is application-dependent. For timing-critical circuits operating near maximum frequency limits, this should be evaluated against specific system requirements. For general logic applications, this difference is typically negligible.

Q: What packaging options are available for the CD4071 logic function?

A: Both the CD4071BCN and CD4071BE are supplied in 14-DIP through-hole packaging. Alternative package types are not covered in this substitution analysis.