74HC166DB,118

Shift Registers Overview

The Nexperia 74HC166DB,118 is an obsolete 8-bit parallel-in/serial-out shift register manufactured by Nexperia USA Inc. It operates within a supply voltage range of 2.0 V to 6.0 V and supports synchronous parallel loading or serial data shifting via the DS input. The device features an asynchronous master reset (MR) and clock enable (CE) functionality. It utilizes CMOS technology for low power dissipation and high noise immunity. The component is housed in a 16-lead SSOP package (SOT338-1), which was removed from the current product data sheet revision.

Shift Registers Feature Summary

• Supports synchronous parallel-to-serial conversion with dedicated D0-D7 inputs
• Features asynchronous master reset and clock enable control
• Provides high noise immunity and latch-up performance exceeding 100 mA

Shift Registers Applications

• Synchronous parallel-to-serial data conversion
• Serial expansion of digital systems
• Input data acquisition in microcontroller interfaces

Shift Registers Procurement Notes

This part number is officially discontinued and no longer manufactured. Verify availability through authorized distributors for remaining stock only. Confirm that the SSOP-16 package matches your PCB footprint requirements before procurement. Ensure design updates account for the removal of this specific package variant from current datasheets.

Shift Registers Selection Notes

Select this component only if legacy compatibility with the SSOP-16 package is strictly required. For new designs, consider alternative packages such as SO16 or TSSOP16 available in the same family. Verify that the HC logic level meets system voltage requirements. Check current inventory status carefully due to end-of-life status.

Shift Registers Part Context

The 74HC166 series belongs to Nexperia's standard 8-bit shift register portfolio. This specific DB suffix denotes the SSOP-16 package, which has been superseded by other package options in recent revisions. The device provides reliable serial data handling for general-purpose digital applications requiring parallel input expansion.

Shift Registers Replacement Considerations

Consider 74HC166D (SO16) or 74HC166PW (TSSOP16) for equivalent functionality with updated packaging. Verify pinout compatibility during transition.