74HCT166DB,118

Shift Registers Overview

The Nexperia 74HCT166DB,118 is an 8-bit parallel-in/serial-out shift register belonging to the 74HCT logic family. It features a serial data input (DS), eight parallel data inputs (D0 to D7), and a serial output (Q7). The device operates with a supply voltage range of 4.5 V to 5.5 V and supports clock frequencies up to 25 MHz at 4.5 V. It includes asynchronous master reset (MR), parallel enable (PE), and clock enable (CE) inputs for flexible control. The component is housed in a 16-lead SSOP package.

Shift Registers Feature Summary

• Supports synchronous parallel-to-serial loading and serial shifting operations via dedicated control inputs.
• Features TTL-compatible input levels suitable for interfacing with standard digital logic systems.
• Includes clamp diodes on all inputs to allow safe interface with voltages exceeding VCC using current limiting resistors.

Shift Registers Applications

• Synchronous parallel-to-serial conversion applications
• Serial data expansion circuits
• Digital signal processing interfaces

Shift Registers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the package type and lead finish. Confirm that the requested part number matches the exact logic family variant required for your design specifications. Check the latest product status to ensure availability and compliance with current environmental standards before finalizing procurement plans.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with TTL-compatible inputs is required. Ensure the operating environment stays within the specified temperature range of -40 °C to +125 °C. Verify that the system power supply remains stable between 4.5 V and 5.5 V to maintain correct logic level thresholds and timing characteristics.

Shift Registers Part Context

This component is part of the 74HCT166 series, which provides 8-bit parallel-in/serial-out functionality. It shares functional similarities with other shift registers but is distinguished by its HCT logic family compatibility and specific pin configuration. The DB suffix indicates the SSOP-16 package variant used for surface-mount assembly.

Shift Registers Replacement Considerations

Check for direct substitutes such as the 74HC166DB variant if CMOS-level inputs are acceptable instead of TTL levels. Verify pinout compatibility and electrical specifications before substituting with other manufacturers' equivalents.