SN74HC166N

Shift Registers Overview

The SN74HC166N is an 8-bit parallel-load shift register manufactured by Texas Instruments in a 16-pin PDIP package. It operates within a supply voltage range of 2V to 6V and supports a recommended operating temperature range of -55°C to 125°C. The device features TTL-compatible CMOS inputs, synchronous loading capability, and an asynchronous clear function. It provides push-pull outputs capable of driving up to 10 LSTTL loads with ±4mA drive current at 5V.

Shift Registers Feature Summary

• Supports parallel-to-serial conversion via eight parallel data inputs or serial input
• Includes direct overriding clear input for immediate reset of all flip-flops
• Features gated clock inputs allowing flexible clock enable or inhibit control

Shift Registers Applications

• Increasing the number of inputs available to a microcontroller
• Parallel-to-serial data conversion circuits
• General-purpose digital logic shifting operations

Shift Registers Procurement Notes

Verify that the specific orderable part number matches the required PDIP package configuration. Confirm the operating temperature grade aligns with system requirements, as industrial variants may differ from commercial grades. Ensure documentation references the latest revision to account for any updates in electrical characteristics or pin definitions.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel load capability is required. It is suitable for applications needing to interface directly with TTL logic levels without additional buffering. Consider the wide operating voltage range and high input impedance if interfacing with various CMOS families.

Shift Registers Part Context

This device belongs to the SNx4HC166 family of 8-bit parallel-load shift registers. It shares functional similarities with other HC series logic devices but is distinct due to its specific parallel-load architecture and asynchronous clear feature. The 'N' suffix specifically denotes the plastic dual-in-line package format.

Shift Registers Replacement Considerations

Compatible substitutes include other 8-bit parallel-load shift registers from the same logic family. Verify pin compatibility and electrical specifications before substitution.