CD4021BM96E4

Shift Registers Overview

The CD4021BM96E4 is an 8-bit parallel-in/serial-out shift register from the Texas Instruments 4000B CMOS logic family. It features a common clock (CP) input and a parallel/serial (P/S) control pin to manage data loading modes. The device utilizes D-type master-slave flip-flops for each bit, providing parallel outputs for internal states and a dedicated serial output. It operates within a supply voltage range of 3V to 15V and supports unrestricted input rise and fall times, ensuring compatibility with various signal sources.

Shift Registers Feature Summary

• Supports both parallel and serial data input configurations via a dedicated control pin.
• Contains eight D-type master-slave flip-flops for reliable data storage and shifting.
• Provides parallel outputs for all register bits alongside a single serial output terminal.
• Operates with unrestricted input transition rates, simplifying interface requirements.

Shift Registers Applications

• Key scanning matrices in gaming controllers and industrial interfaces.
• Expansion of digital input channels in microprocessor-based systems.
• Data acquisition systems requiring parallel-to-serial conversion.
• Control circuits utilizing push-button arrays for user input.

Shift Registers Procurement Notes

Verify the specific suffix E4 against current manufacturer documentation to confirm lead-free status and environmental compliance details. Ensure the SOIC-16 package dimensions match your PCB footprint requirements. Confirm that the operating temperature range of -55°C to +125°C aligns with your system's thermal design constraints before finalizing procurement.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel load capability is required in a CMOS environment. It is suitable for applications needing to reduce I/O pin usage on a controller by converting parallel inputs to a serial stream. Consider the 4000B series characteristics regarding speed and power consumption relative to HC or HCT alternatives if higher performance is needed.

Shift Registers Part Context

This part belongs to the CD4000B series of high-voltage CMOS logic devices manufactured by Texas Instruments. The series is known for wide supply voltage operation and low static power consumption. The CD4021 variant specifically addresses the need for parallel data capture and serial transmission in compact integrated circuit form factors.

Shift Registers Replacement Considerations

CD4021BE

Shift Registers FAQ

How is the mode of operation controlled?

The P/S pin determines the mode; a low level enables parallel loading, while a high level enables serial shifting.

What type of flip-flops are used internally?

The device uses D-type master-slave flip-flops for each of the eight bits.