CMOS building block for mixed-voltage and harsh-environment logic
The Texas Instruments CD4007UBNSR is a 4000B-series CMOS logic IC that integrates a complementary pair plus an inverter in a single 14-SOIC package. It provides three independent logic gates — two complementary pairs and one inverter — for board-level glue logic, level translation, and oscillator circuits where the wide 3V to 18V supply range lets it bridge 5V, 12V, and 15V rails without external level shifters. The 4000B family's symmetrical output drive and noise immunity make it a drop-in replacement for legacy 4000-series sockets in high-reliability retrofits.
Supply voltage and temperature — what drives the selection
The 3V to 18V supply range is the headline selection parameter. Unlike 5V-only HC/HCT families, the CD4007UBNSR operates directly from a 12V or 15V industrial rail, eliminating a regulator stage. At the low end, 3V support lets it interface with 3.3V microcontrollers in mixed-voltage designs, though propagation delay increases at lower supply — budget margin if running at 3V. Typical deployment includes engine bay electronics, outdoor telecom cabinets exposed to direct sun, and cold-soak satellite subsystems. The 4000B series uses a buffered output stage that reduces supply-current variation across temperature compared to the unbuffered 4000A series.
Package and footprint note
The supplier device package is 14-SO. This is not a narrow-body SOIC-14 (3.9 mm) — verify the PCB land pattern matches the wider body before layout.