HCF4021BEY

Shift Registers Overview

The HCF4021BEY is an 8-stage static shift register from the HCF4000B series, fabricated in metal oxide semiconductor technology. It features parallel or serial input and serial output capabilities with common clock and control inputs. The device includes a single serial data input and individual parallel 'jam' inputs for each stage. It utilizes D-type master-slave flip-flops and provides buffered outputs from stages 6, 7, and 8. Serial entry is synchronous with the clock, while parallel entry is asynchronous. The component operates within a supply voltage range of 3 V to 20 V and supports a typical clock rate of 12 MHz at 10 V.

Shift Registers Feature Summary

• Supports both parallel and serial data entry modes via dedicated control inputs
• Contains eight master-slave flip-flops with buffered outputs available from multiple stages
• Enables register expansion through compatible package interfaces

Shift Registers Applications

• Parallel-to-serial data conversion circuits
• Serial-to-parallel data conversion systems
• General-purpose digital shift register applications

Shift Registers Procurement Notes

Verify the specific suffix 'BEY' against official STMicroelectronics documentation to confirm package type and material compliance. Ensure the ordering code matches the required SOIC-16 or DIP-16 configuration as specified in the datasheet. Confirm that the component meets the necessary environmental standards for the intended deployment environment before finalizing procurement.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with flexible parallel or serial loading is required. It is suitable for designs needing buffered outputs from intermediate stages. Consider the operating temperature range and supply voltage requirements to ensure compatibility with the system's power rails and environmental conditions.

Shift Registers Part Context

This part belongs to the HCF4000B series of high-speed CMOS logic devices. It is manufactured by STMicroelectronics using metal oxide semiconductor technology. The series is known for medium-speed operation and fully static functionality, making it suitable for various general-purpose digital logic applications requiring reliable data shifting capabilities.

Shift Registers Replacement Considerations

Direct substitutes include the CD4021BE from Texas Instruments. Verify pinout compatibility and electrical specifications before substitution.