SN74LVC166ABQBR

Shift Registers Overview

The SN74LVC166ABQBR is an 8-bit parallel-load shift register from Texas Instruments. It operates within a supply voltage range of 1.1V to 3.6V and features over-voltage tolerant inputs supporting up to 5.5V independent of VCC. The device includes partial-power-down protection with back drive capability (Ioff) and high push-pull output drive strength. Maximum propagation delay is 11.2ns at 3.3V supply. Latch-up performance exceeds 100mA per JESD78. It utilizes a 16-pin WQFN package.

Shift Registers Feature Summary

• Supports partial-power-down with back drive protection
• Features over-voltage tolerant inputs independent of VCC
• Includes asynchronous clear input for immediate reset

Shift Registers Applications

• Increase the number of inputs on a microcontroller
• Read in board revision

Shift Registers Procurement Notes

Verify the specific BQB package suffix against official documentation to confirm pinout and thermal pad configuration. Ensure the ordering suffix matches the required 16-pin WQFN form factor. Confirm that the component meets the specified operating temperature range and electrical characteristics for your application environment before finalizing procurement.

Shift Registers Selection Notes

Select this component when expanding microcontroller I/O without requiring complex communication interfaces. It is suitable for applications needing synchronous parallel loading and serial shifting. Consider the high push-pull drive strength for driving larger loads. Verify compatibility with system logic levels and power supply constraints.

Shift Registers Part Context

This part belongs to the SN74LVC166A series of 8-bit parallel-load shift registers. It is designed for low-voltage CMOS applications. The series provides standard digital logic functions for data storage and transfer. It is commonly used in embedded systems for interface expansion and data acquisition tasks.

Shift Registers Replacement Considerations

Check for SN74LVC166A variants with different package options such as SOIC or TSSOP if physical footprint changes are acceptable. Verify functional equivalence regarding voltage tolerance and drive strength. Ensure any substitute maintains the same 16-pin configuration and pinout compatibility.