CD4081BE-NG Equivalent & Substitute Parts

Part Overview

The CD4081BE-NG is a 4-channel AND gate logic integrated circuit manufactured by Texas Instruments, part of the 4000B CMOS logic series. This device implements four independent 2-input AND gates in a 14-pin DIP package for through-hole mounting applications.

The CD4081BE-NG is classified as obsolete product status. Locating equivalent substitute parts becomes necessary for new designs, production continuity, or when through-hole mounting is not required. The CD4081BPWR provides functional equivalence with improved availability and active product status, offering surface-mount packaging as an alternative form factor.

Substiute Parts

CD4081BE-NG

Texas InstrumentsIn Stock: 790CD4081BE-NG Datasheet

Current PartRFQ

CD4081BPWR

Texas InstrumentsIn Stock: 17367CD4081BPWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD4081BE-NG with the CD4081BPWR is valid based on the following criteria:

Functional Equivalence: Both parts share identical logic architecture (4-channel AND gate, 2-input configuration), supply voltage range (3V ~ 18V), operating temperature range (-55°C ~ 125°C), and propagation delay characteristics (90ns @ 15V, 50pF).

Electrical Compatibility: Input logic levels (Low: 1.5V ~ 4V; High: 3.5V ~ 11V) and output drive capabilities remain within compatible ranges. The CD4081BPWR exhibits lower quiescent current (1 µA vs. 5 µA) and reduced output current (3.4mA vs. 6.8mA), representing improved power efficiency without affecting functional compatibility.

Regulatory Compliance: Both parts maintain ROHS3 compliance, ensuring environmental and regulatory alignment.

Form Factor Difference: The primary distinction is packaging: CD4081BE-NG uses 14-DIP through-hole mounting, while CD4081BPWR uses 14-TSSOP surface-mount technology. This difference requires PCB redesign but does not affect electrical function.

Product Status: CD4081BPWR holds active product status with significantly higher inventory availability (17,300 pcs vs. 680 pcs), supporting long-term supply chain reliability.

Parameter Comparison

Engineering Selection Recommendations

For Continued Through-Hole Applications: The CD4081BE-NG remains the appropriate choice if PCB design constraints mandate through-hole mounting and existing inventory is available. However, given obsolete product status, long-term sourcing should be evaluated against design timeline requirements.

For New Designs and Surface-Mount Applications: The CD4081BPWR is the recommended selection. Active product status ensures sustained availability, higher inventory levels support production scaling, and surface-mount technology aligns with modern PCB manufacturing standards. Electrical performance is functionally equivalent with improved power efficiency characteristics.

Compliance Considerations: Both parts maintain ROHS3 compliance. The CD4081BPWR includes additional regulatory documentation (REACH Unaffected, ECCN: EAR99, HTSUS: 8542.39.0001) supporting international distribution and supply chain documentation requirements.

Packaging and Supply Chain: CD4081BPWR is available in Cut Tape (CT) and Digi-Reel® packaging formats, supporting both manual assembly and automated pick-and-place operations. Inventory availability (17,300 pcs) provides supply chain security for production volumes.

Frequently Asked Questions (FAQ)

Q: Can CD4081BPWR directly replace CD4081BE-NG without circuit modification?

A: Electrical function is identical. However, packaging differs fundamentally: CD4081BE-NG uses through-hole DIP mounting while CD4081BPWR uses surface-mount TSSOP technology. Direct PCB substitution without layout redesign is not possible. Schematic-level functionality remains unchanged.

Q: What are the power consumption differences between these parts?

A: CD4081BPWR exhibits lower quiescent current (1 µA vs. 5 µA) and reduced output drive current (3.4mA vs. 6.8mA). These improvements reduce overall power dissipation, particularly beneficial in battery-powered or low-power applications. Both parts operate across identical supply voltage ranges (3V ~ 18V).

Q: Are timing characteristics identical between the two parts?

A: Yes. Maximum propagation delay is specified identically at 90ns when measured at 15V supply with 50pF load capacitance. Input and output logic levels are identical, ensuring timing-critical applications experience no functional degradation.

Q: Why is CD4081BE-NG classified as obsolete?

A: Obsolete status reflects Texas Instruments' discontinuation of the through-hole DIP package variant in favor of surface-mount technology. The CD4081BPWR represents the active product line continuation with equivalent functionality in modern packaging.

Q: What is the moisture sensitivity level (MSL) difference?

A: CD4081BE-NG lists MSL as Not Applicable (through-hole components typically do not require MSL classification). CD4081BPWR specifies MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling for surface-mount operations.

Q: Can both parts be used interchangeably in mixed-technology PCBs?

A: No. PCB design must commit to either through-hole or surface-mount technology. Mixed implementation on the same board requires separate assembly processes and is not practical for production. Select one variant based on overall PCB assembly strategy.

Q: What packaging formats are available for CD4081BPWR?

A: CD4081BPWR is supplied in Cut Tape (CT) and Digi-Reel® formats, supporting both manual component placement and automated pick-and-place assembly equipment.