CD4081BDMSR Equivalent & Substitute Parts

Part Overview

The CD4081BDMSR is a 4-channel AND gate logic integrated circuit manufactured by Renesas Electronics Corporation in the 4000B CMOS logic family. This device features dual-input AND gates configured in a 14-pin DIP package and operates across a wide supply voltage range of 3V to 18V. The CD4081BDMSR is classified as obsolete, making identification of functionally compatible alternatives necessary for ongoing design support and procurement continuity. The part is currently in stock with 1050 units available.

Substiute Parts

CD4081BDMSR

Renesas Electronics CorporationIn Stock: 1081CD4081BDMSR Datasheet

Current PartRFQ

CD4069UBE

Texas InstrumentsIn Stock: 27297CD4069UBE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution analysis for the CD4081BDMSR is based on the following critical parameters that define functional compatibility:

Voltage Supply Range: Both the main part and substitute must operate within overlapping supply voltage specifications to ensure circuit compatibility.

Operating Temperature Range: The temperature operating window must encompass the application requirements.

Mounting Type and Package Footprint: Through-hole mounting and 14-pin DIP package configuration ensure mechanical and electrical compatibility with existing PCB layouts.

Series Classification: Membership in the 4000B CMOS logic family ensures consistent electrical characteristics and pin compatibility protocols.

Logic Function and Circuit Configuration: The substitute part must provide equivalent logic gating functionality with compatible input/output characteristics.

The CD4069UBE from Texas Instruments is identified as a substitute part within the 4000B series. However, this part functions as an inverter (6 channels, 1 input per channel) rather than an AND gate (4 channels, 2 inputs per channel). While both parts share the same supply voltage range (3V ~ 18V), operating temperature range (-55°C ~ 125°C), 14-pin DIP package footprint, and 4000B series classification, the fundamental logic function differs. The CD4069UBE cannot directly replace the CD4081BDMSR in applications requiring AND gate logic operations.

Parameter Comparison

Engineering Selection Recommendations

The CD4069UBE is listed as a substitute part but does not provide functional equivalence to the CD4081BDMSR due to fundamental differences in logic operation. The CD4081BDMSR implements AND gate logic with 4 independent 2-input gates, while the CD4069UBE implements inverter logic with 6 independent 1-input inverters.

Compatibility Assessment:

The CD4069UBE shares compatible electrical parameters with the CD4081BDMSR in the following areas:

Supply voltage range (3V ~ 18V) permits operation in identical power supply configurations. Operating temperature range (-55°C ~ 125°C) ensures equivalent thermal performance specifications. Output current characteristics (3.4mA vs. 3.5mA) are sufficiently similar for most load applications. Package footprint (14-DIP) and mounting type (through-hole) provide mechanical compatibility with existing PCB designs. Both parts belong to the 4000B CMOS logic series and carry identical ECCN and HTSUS classifications.

Product Status Consideration:

The CD4081BDMSR is classified as obsolete, while the CD4069UBE maintains active product status with significantly higher inventory availability (27200 units vs. 1050 units). The CD4069UBE carries RoHS3 compliance certification, whereas the CD4081BDMSR does not specify RoHS status.

Functional Limitation:

Direct substitution is not possible without circuit redesign. Applications requiring AND gate logic cannot utilize an inverter IC without additional external logic configuration. Alternative AND gate devices within the 4000B series should be evaluated for true functional replacement.

Frequently Asked Questions (FAQ)

Q: Can the CD4069UBE directly replace the CD4081BDMSR in my circuit?

A: No. The CD4069UBE is an inverter IC with 6 channels of 1-input logic, while the CD4081BDMSR is an AND gate IC with 4 channels of 2-input logic. Direct substitution would result in incorrect logic function and circuit malfunction.

Q: What parameters make these parts compatible?

A: Both parts operate within the same supply voltage range (3V ~ 18V), share identical operating temperature specifications (-55°C ~ 125°C), use the same 14-pin DIP package footprint, employ through-hole mounting, and belong to the 4000B CMOS logic series. These parameters ensure compatibility only for physical installation and power supply requirements, not for logic function.

Q: Why is the CD4069UBE listed as a substitute if it cannot replace the CD4081BDMSR?

A: The CD4069UBE is listed based on shared series classification, package compatibility, and electrical parameter overlap within the 4000B logic family. However, the fundamental difference in logic function (inverter vs. AND gate) prevents functional substitution. This listing indicates parts that share common characteristics but does not guarantee functional equivalence.

Q: What is the difference in propagation delay between these parts?

A: The CD4081BDMSR exhibits a maximum propagation delay of 90ns at 15V with 50pF load, while the CD4069UBE exhibits 50ns under identical conditions. The CD4069UBE demonstrates faster switching performance, but this advantage is irrelevant for applications requiring AND gate logic.

Q: Are there compliance differences between these parts?

A: The CD4069UBE carries RoHS3 compliance certification and REACH unaffected status. The CD4081BDMSR does not specify RoHS compliance. Both parts carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Q: What should I do if I need to replace an obsolete CD4081BDMSR?

A: Identify alternative AND gate ICs within the 4000B series or equivalent logic families that provide 4 channels of 2-input AND gate functionality. Verify that the replacement part operates within your circuit's supply voltage and temperature requirements and uses a compatible package footprint. The CD4069UBE is not suitable for this application.