CD4021BPW

Shift Registers Overview

The CD4021BPW is an 8-stage static shift register from the Texas Instruments 4000B CMOS logic family. It features serial-to-parallel data conversion with a single serial input and eight parallel outputs. The device operates within a supply voltage range of 3 V to 18 V and supports bidirectional clocking for flexible data shifting. It is housed in a 16-pin SOIC package and functions reliably across an industrial temperature range of -55 °C to +125 °C.

Shift Registers Feature Summary

• Provides 8-stage serial-to-parallel data conversion capability
• Supports bidirectional clock inputs for versatile shifting operations
• Operates on a wide DC supply voltage range from 3 V to 18 V

Shift Registers Applications

• Parallel output expansion in digital control systems
• Data acquisition interfaces requiring serial-to-parallel conversion
• Industrial logic circuits operating under wide voltage conditions

Shift Registers Procurement Notes

Verify that the part number suffix 'PW' corresponds specifically to the SOIC-16 package variant, as packaging options may vary within the same logic family. Confirm the absence of automotive qualification markings (such as 'Q1') if standard commercial grade performance is required. Ensure the component matches the specified 4000B series characteristics rather than high-speed or low-power variants.

Shift Registers Selection Notes

Select this component when an 8-bit parallel output is required from a serial source using standard CMOS technology. It is suitable for applications demanding operation over a wide voltage spectrum up to 18 V. Consider the bidirectional clock feature if system design requires shifting data in multiple directions without additional external gating logic.

Shift Registers Part Context

This component belongs to the CD4000B series of CMOS logic devices, which are known for their high noise immunity and wide operating voltage range. The CD4021B variant specifically addresses the need for serial-to-parallel conversion in general-purpose logic applications. It serves as a fundamental building block for expanding I/O capabilities in microcontroller-based systems.

Shift Registers Replacement Considerations

CD4021BE: Equivalent logic function in a different package type.