The CD4021 is a high-performance 8-stage parallel-in serial-out shift register IC from the CD4XXX CMOS logic family, designed for efficient data conversion and digital signal handling in embedded and industrial electronic systems. Built using advanced CMOS technology, it delivers ultra-low power consumption, high noise immunity, and stable switching performance, ensuring reliable operation across a wide range of applications.
Operating over a wide supply voltage range of 3V to 15V, the CD4021 provides excellent design flexibility compared to lower-voltage logic families. This broad voltage compatibility allows seamless integration into battery-powered systems as well as standard 5V and 12V digital logic circuits. Its CMOS architecture ensures minimal static power dissipation while maintaining accurate data storage and shifting performance.
The device features 8 parallel input pins with serial output capability, enabling efficient data conversion and reducing microcontroller I/O usage. This makes it ideal for expanding input capability in digital systems while maintaining compact circuit design and high efficiency.
Its optimized internal structure ensures low thermal generation, high reliability, and stable long-term operation even in continuous-use environments.
Available in both DIP and SOP package types, the CD4021 offers flexible integration for prototyping, PCB design optimization, and scalable production applications.
Key Features & Applications (Combined)
- 8-stage parallel-in serial-out shift register IC
- Wide operating voltage: 3V to 15V
- Ultra-low power CMOS technology
- High noise immunity and stable operation
- Efficient data conversion with minimal I/O usage
- Low static power consumption
- Reliable long-term performance
- Available in DIP and SOP packages
Applications:
- Microcontroller input expansion
- Digital data acquisition systems
- Industrial automation electronics
- Embedded system design
- Signal processing and control circuits
- Keypad and sensor interfacing
- General-purpose CMOS logic applications
