74HC166D,653

Shift Registers Overview

The Nexperia 74HC166D,653 is an 8-bit parallel-in/serial-out shift register housed in a 16-lead SO plastic small outline package (SOT109-1). It operates within a supply voltage range of 2.0 V to 6.0 V and supports ambient temperatures from -40 °C to +125 °C. The device features eight parallel data inputs (D0 to D7), a serial data input (DS), and a serial output (Q7). Key control signals include a clock enable (CE), parallel enable (PE), asynchronous master reset (MR), and edge-triggered clock input (CP).

Shift Registers Feature Summary

• Supports synchronous parallel-to-serial loading and serial shifting operations.
• Includes clamp diodes on inputs to allow interfacing with voltages exceeding VCC using current limiting resistors.
• Provides high noise immunity and low power dissipation characteristics typical of CMOS technology.

Shift Registers Applications

• Synchronous parallel-to-serial data conversion applications.
• Expansion of serial input capabilities for digital systems.
• Data acquisition systems requiring parallel input capture.

Shift Registers Procurement Notes

Verify the specific ordering suffix matches the required package type, as the base part number covers multiple packages. Confirm that the temperature grade aligns with system requirements, noting the specified range extends to +125 °C. Ensure design compliance with JEDEC standards for ESD protection and latch-up performance before finalizing procurement specifications.

Shift Registers Selection Notes

Select this component when an 8-bit parallel load capability is required alongside serial output functionality. The HC logic family ensures compatibility with standard CMOS voltage levels across a wide operating range. Consider the SO16 package dimensions if board space constraints dictate the use of a small outline package over other available variants like TSSOP.

Shift Registers Part Context

This component belongs to the 74HC series of high-speed CMOS logic devices manufactured by Nexperia. It functions as a fundamental building block for sequential logic circuits, specifically designed to manage data flow between parallel and serial domains. The device adheres to established industry standards for digital logic integration.

Shift Registers Replacement Considerations

The 74HC166D,653 serves as a direct replacement for the discontinued 74HC166D,652 variant within the Nexperia portfolio. Designers should verify pinout compatibility and electrical specifications when substituting older revisions or equivalent parts from other manufacturers.