MC14021BFR1

Shift Registers Overview

The MC14021BFR1 is an 8-bit parallel-in serial-out shift register manufactured by onsemi. It belongs to the 4000B series of CMOS logic devices and operates within a supply voltage range of 3V to 18V. The component features push-pull outputs and supports both parallel loading and serial shifting operations. It is housed in a surface-mount package designed for industrial temperature ranges, providing reliable data storage and transfer capabilities for digital systems requiring serial interface conversion.

Shift Registers Feature Summary

• Supports parallel-to-serial data conversion with dedicated parallel load control
• Features buffered outputs capable of driving standard TTL loads
• Includes diode protection on all inputs for enhanced noise immunity

Shift Registers Applications

• Parallel-to-serial data conversion interfaces
• LED display scanning drivers
• Memory expansion circuits

Shift Registers Procurement Notes

Verify the specific suffix 'FR1' against official datasheets to confirm reel packaging specifications and tape dimensions. Confirm RoHS compliance status as historical 4000B series variants may differ. Ensure the operating temperature range meets system requirements before procurement.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel input capability is required. Compare pin compatibility with CD4021B equivalents if replacing legacy designs. Verify that the supply voltage range aligns with the target system's power rails.

Shift Registers Part Context

This device is part of the widely used 4000B CMOS logic family, known for broad voltage operation and high noise immunity. It serves as a fundamental building block for sequential logic applications, offering a cost-effective solution for expanding I/O lines in microcontroller-based systems.

Shift Registers Replacement Considerations

CD4021B is a direct pin-for-pin replacement. Verify electrical characteristics match application needs when substituting.