4012BDC

Overview

The National Semiconductor 4012BDC is a dual 4-input NAND gate integrated circuit belonging to the CD4000 series of CMOS logic devices. It features two independent NAND gates, each with four inputs, housed in a 14-pin Ceramic Dual In-Line Package (CDIP). The device operates on a supply voltage range typically from 3V to 15V, providing high noise immunity and low power consumption characteristic of CMOS technology. It is designed for general-purpose digital logic applications requiring reliable switching performance.

Feature Summary

• Dual independent 4-input NAND logic functionality
• CMOS construction for low power operation
• Ceramic Dual In-Line Package (CDIP) for robust mounting

Applications

• General-purpose digital logic circuits
• Industrial control systems
• Consumer electronics logic interfaces

Procurement Notes

Verify the package type carefully, as sources list both CDIP and SOIC variants for similar part numbers. Confirm RoHS compliance status, as some listings indicate non-compliance. Ensure the manufacturer is correctly identified as National Semiconductor or its successor Texas Instruments, given historical brand transitions. Check pinout compatibility if replacing older designs.

Selection Notes

Select this component when a dual 4-input NAND gate is required in a through-hole ceramic package. Consider the operating voltage range and input threshold levels relative to the system logic family. Evaluate thermal requirements and physical space constraints associated with the CDIP footprint compared to surface-mount alternatives.

Part Context

This part belongs to the CD4000 series of CMOS logic ICs, widely used for decades in digital electronics. The 'B' suffix often denotes specific speed grades or packaging variations within the series. National Semiconductor was acquired by Texas Instruments, so datasheets may now be hosted under TI branding while retaining the original part number designation.

Replacement Considerations

Compatible substitutes include other CD4012 variants from different manufacturers that adhere to the same pinout and electrical specifications. Verify that any replacement maintains the 14-CDIP form factor or requires adapter solutions. Cross-reference with standard 74HC/HCT equivalents only if voltage levels and package types are adjusted accordingly.