CD4071BF3A

The Texas Instruments CD4071BF3A is a quad 2-input OR gate from the CD4000B CMOS logic family, provided in a hermetic 14-lead ceramic dual-in-line package (CDIP-14) and qualified for military and high-reliability applications. The device features buffered inputs and outputs that enhance noise immunity and provide balanced propagation delays. Operating across a wide supply voltage range (typically 3 V to 18 V), the CD4071B family delivers high noise margins (typically 45% of VDD) and low quiescent current, making it suited for battery-operated and noise-prone environments. The CDIP package ensures a hermetically sealed cavity that protects against moisture and contamination, allowing reliable operation over the full military temperature range of –55°C to +125°C.

Typical deployments include logic OR gating in digital control units for military avionics, missile guidance systems, and satellite telemetry interfaces where deterministic performance under extreme conditions is required. The part also serves in industrial safety systems and secure communications equipment requiring high noise immunity and long service life. From a procurement standpoint, the CD4071BF3A is a military-grade component; designers should confirm active production status with Texas Instruments or authorized distribution, as legacy CMOS logic devices can face supply constraints or obsolescence. Parts carrying the BF3A suffix are processed to enhanced screening and traceability standards, and equivalents compliant with MIL-STD-883 or SMD may be specified in qualification documents. System integrators maintaining long-life platforms often stock spares or plan for lifetime buys when a device transitions to EOL notice.