74HC166DB,112

Shift Registers Overview

The Nexperia 74HC166DB,112 is an obsolete 8-bit parallel-in/serial-out shift register. It operates within a supply voltage range of 2.0 V to 6.0 V and features eight parallel data inputs (D0 to D7), a serial data input (DS), and a serial output (Q7). The device includes asynchronous master reset (MR) and clock enable (CE) inputs. It utilizes CMOS technology for low power dissipation and high noise immunity. The component is housed in a 16-lead SSOP package.

Shift Registers Feature Summary

• Supports synchronous parallel-to-serial data loading and serial shifting operations
• Includes asynchronous active LOW master reset functionality
• Features input clamp diodes for interfacing with voltages exceeding VCC

Shift Registers Applications

• Synchronous parallel-to-serial conversion circuits
• Serial data expansion systems
• Digital logic control interfaces

Shift Registers Procurement Notes

This product has reached end-of-life status and is no longer manufactured by Nexperia. Current availability is limited to existing stock held by distributors or third-party suppliers. Buyers must verify the authenticity and condition of available units carefully. Alternative sourcing channels may offer surplus inventory, but lead times and quality assurance cannot be guaranteed by the manufacturer.

Shift Registers Selection Notes

Designers should consider that this specific part number is discontinued. When selecting components for new designs, engineers must evaluate alternative active parts from the same family or compatible manufacturers. Verify pin compatibility and electrical specifications against current datasheets to ensure seamless integration into modern hardware architectures without requiring significant circuit redesign.

Shift Registers Part Context

The 74HC166 series belongs to the standard 74HC logic family, widely used for general-purpose digital applications. This specific variant provides 8-bit storage capability with serial output. The 'DB' suffix indicates the SSOP package type. As an HC-series device, it offers performance characteristics suitable for various consumer and industrial electronic applications requiring reliable data shifting and storage functions.

Shift Registers Replacement Considerations

Public confirmed substitute part numbers include 74HC166D,653.