CD4081BNS Equivalent & Substitute Parts

Part Overview

The CD4081BNS is a 4-channel AND gate logic integrated circuit manufactured by Texas Instruments, part of the 4000B CMOS logic series. This device integrates four independent 2-input AND gates in a 14-pin surface mount package (14-SOIC). The CD4081BNS is designated as Last Time Buy, indicating discontinued production status. Identification of equivalent substitute parts is necessary to ensure continued design support, procurement availability, and long-term supply chain reliability for applications utilizing this logic gate configuration.

Substiute Parts

CD4081BNS

Texas InstrumentsIn Stock: 749CD4081BNS Datasheet

Current PartRFQ

CD4081BNSR

Texas InstrumentsIn Stock: 3039CD4081BNSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD4081BNS is determined by strict equivalence across the following critical parameters:

Functional Equivalence: Logic type (AND Gate), number of circuits (4 channels), and number of inputs per gate (2 inputs) must be identical.

Electrical Compatibility: Supply voltage range (3V ~ 18V), input logic levels (Low: 1.5V ~ 4V; High: 3.5V ~ 11V), and propagation delay (90ns @ 15V, 50pF) must match or be superior.

Mechanical Compatibility: Package type (14-SOIC), physical dimensions (0.209" width, 5.30mm), and mounting type (Surface Mount) must be identical.

Regulatory Compliance: RoHS3 compliance and moisture sensitivity level (MSL 1) must be maintained.

Availability Status: The substitute part CD4081BNSR maintains all functional and electrical parameters while offering active product status and improved inventory availability.

Parameter Comparison

Engineering Selection Recommendations

CD4081BNSR as Primary Substitute: The CD4081BNSR is the direct functional equivalent of the CD4081BNS. Both parts share identical logic configuration, electrical specifications, and package geometry. The CD4081BNSR maintains active product status with Texas Instruments, ensuring continued manufacturing support and supply chain availability. Current inventory levels for CD4081BNSR (2960 pieces) exceed those of the CD4081BNS (659 pieces), providing superior procurement reliability.

Electrical Performance: The CD4081BNSR demonstrates improved power efficiency with reduced quiescent current (1 µA versus 5 µA) and lower output drive currents (3.4 mA versus 6.8 mA). These improvements do not compromise functional compatibility and may reduce thermal dissipation in power-sensitive applications.

Compliance and Certification: Both parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with modern manufacturing processes and long-term storage requirements. The CD4081BNSR includes documented REACH Unaffected status.

Packaging Consideration: The CD4081BNSR is supplied in Tape & Reel (TR) format, standard for automated assembly operations. The CD4081BNS bulk packaging may require repackaging for high-volume production environments.

Frequently Asked Questions (FAQ)

Q: Can CD4081BNSR replace CD4081BNS in existing designs without modification?

A: Yes. The CD4081BNSR is a direct functional equivalent. Identical logic type, circuit count, input configuration, supply voltage range, input/output logic levels, propagation delay, operating temperature range, and package geometry ensure pin-for-pin compatibility and functional interchangeability.

Q: What are the differences between CD4081BNS and CD4081BNSR?

A: The primary differences are product status and packaging format. CD4081BNS is Last Time Buy (discontinued); CD4081BNSR is Active. CD4081BNS uses bulk packaging; CD4081BNSR uses Tape & Reel format. CD4081BNSR exhibits lower quiescent current (1 µA vs. 5 µA) and reduced output drive currents (3.4 mA vs. 6.8 mA), representing improved power efficiency without functional impact.

Q: Are there any thermal or power dissipation concerns when substituting CD4081BNSR for CD4081BNS?

A: No. The reduced quiescent and output currents of CD4081BNSR result in lower power dissipation compared to CD4081BNS, providing equal or improved thermal performance.

Q: Is the 14-SOIC package identical between both parts?

A: Yes. Both parts use 14-SOIC (0.209", 5.30mm Width) surface mount packaging with identical pin configuration and physical dimensions, ensuring direct PCB compatibility.

Q: What is the significance of the Last Time Buy status for CD4081BNS?

A: Last Time Buy indicates that Texas Instruments has discontinued production of the CD4081BNS. Existing inventory will be depleted without replenishment. CD4081BNSR, with Active status, ensures continued availability for new designs and long-term production requirements.

Q: Are both parts RoHS3 compliant?

A: Yes. Both CD4081BNS and CD4081BNSR are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, meeting modern environmental and manufacturing standards.