CD74HC166E

Shift Registers Overview

The CD74HC166E is an 8-bit parallel-in/serial-out shift register manufactured by Texas Instruments. It belongs to the 74HC logic family and utilizes high-speed CMOS technology. The device operates within a supply voltage range of 2V to 6V and supports a maximum clock frequency of 25MHz at 5V. It features a serial data input, eight parallel data inputs, and a serial data output. The component is housed in a 16-pin PDIP package and is rated for an operating temperature range from -55°C to +125°C.

Shift Registers Feature Summary

• Supports parallel-to-serial data conversion with dedicated parallel load capability
• Features high-speed CMOS construction for low power consumption
• Includes serial data input and output terminals for cascading applications

Shift Registers Applications

• Data acquisition systems requiring parallel-to-serial conversion
• Industrial control interfaces for expanding I/O capabilities
• Communication equipment utilizing serial data transmission protocols

Shift Registers Procurement Notes

Verify the manufacturer part number against official Texas Instruments documentation to ensure authenticity. Confirm that the specific orderable part matches the required PDIP-16 package and HC logic series specifications. Check RoHS compliance status as indicated in current datasheets. Ensure the procurement source provides valid traceability for industrial or commercial deployment requirements.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel loading is required in a through-hole design. The HC logic family offers compatibility with standard 5V logic levels while supporting lower voltages down to 2V. Consider the PDIP-16 package constraints for PCB layout. Verify that the 25MHz clock speed meets the system timing requirements for the intended application environment.

Shift Registers Part Context

This component is part of the Texas Instruments 74HC series of high-speed CMOS logic devices. The 74HC166 specifically functions as an 8-bit parallel-in/serial-out shift register. It is designed for general-purpose digital logic applications where data serialization is necessary. The device complements other 74HC family members for complex logic circuit designs.

Shift Registers Replacement Considerations

Publicly confirmed substitute part numbers include CD74HC166M96 and CD74HC166MT. These variants maintain functional equivalence but differ in packaging type, such as SOIC or tape-and-reel formats. Verify pinout compatibility and electrical specifications before substitution.