CD4021BM

Shift Registers Overview

The CD4021BM is an 8-bit static shift register from the Texas Instruments 4000B CMOS logic series. It functions as a parallel-to-serial converter with a synchronous serial data input, clock input, and asynchronous active HIGH parallel load input. The device features eight asynchronous parallel data inputs and buffered parallel outputs derived from the last three stages. It operates within a supply voltage range of 3 V to 18 V and supports a wide operating temperature range from -55 °C to +125 °C. The component is housed in a standard SOIC-16 surface-mount package.

Shift Registers Feature Summary

• Provides 8-bit static shift register functionality for serial-to-parallel and parallel-to-serial data conversion
• Includes an asynchronous active HIGH parallel load input for immediate data synchronization
• Features buffered parallel outputs available from the final three stages of the register chain

Shift Registers Applications

• Parallel-to-serial data conversion interfaces
• Serial-to-parallel expansion circuits
• Digital signal processing control logic

Shift Registers Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm package type and temperature grade. Ensure the ordering part number matches the required industrial specifications. Confirm RoHS compliance status through official documentation before procurement.

Shift Registers Selection Notes

Select this component when an 8-bit shift register is required within the 4000B CMOS family. Verify that the 3 V to 18 V supply voltage range aligns with the system design. Check that the SOIC-16 package dimensions fit the PCB layout constraints.

Shift Registers Part Context

This device belongs to the CD4000B series of CMOS logic integrated circuits manufactured by Texas Instruments. The series is characterized by high noise immunity and low power consumption. The CD4021BM specifically addresses applications requiring reliable 8-bit data shifting capabilities in harsh environments.

Shift Registers Replacement Considerations

Compatible alternatives include the CD4021BEE4 and other variants within the CD4021B family. Verify pin compatibility and electrical characteristics before substitution.