CD74AC164M

Shift Registers Overview

The CD74AC164M is an 8-bit serial-in, parallel-out shift register from the Texas Instruments AC logic family. It operates on a single supply voltage ranging from 1.5 V to 5.5 V and features push-pull outputs. The device utilizes a 14-pin Small Outline Integrated Circuit (SOIC) package with a standard .25-inch width. It supports an asynchronous reset function triggered by a low-level signal and shifts data on the rising edge of the clock input. The component is rated for operation across an extended temperature range from -55°C to +125°C.

Shift Registers Feature Summary

• Converts serial data inputs into parallel outputs using eight flip-flops
• Includes an asynchronous clear input that resets all stages independently of the clock
• Features dual serial data inputs (A and B) requiring both to be high for data entry
• Provides symmetrical output drive capabilities suitable for direct interfacing

Shift Registers Applications

• Serial-to-parallel data conversion in communication interfaces
• Driving LED displays or indicator arrays from microcontroller ports
• Expanding I/O capabilities for digital control systems
• Creating simple delay lines or pattern generators

Shift Registers Procurement Notes

Verify the specific suffix against the manufacturer's current datasheet to confirm package dimensions and lead finish. Ensure the ordered variant matches the required operating temperature range and voltage specifications. Confirm RoHS compliance status if environmental regulations apply to the final assembly. Cross-reference the ordering part number with official distributor catalogs to avoid obsolete stock.

Shift Registers Selection Notes

Select this component when a wide supply voltage range including low-voltage operation is required. The AC series offers higher speed performance compared to standard HC logic while maintaining CMOS power efficiency. Consider the SOIC package for surface-mount assembly constraints. Verify that the asynchronous reset requirement aligns with the system's initialization sequence needs.

Shift Registers Part Context

This device belongs to the Texas Instruments 74AC logic family, designed for high-speed CMOS applications. It serves as a fundamental building block for sequential logic circuits within digital systems. The AC series provides improved switching speeds over earlier generations while preserving compatibility with standard logic levels. It is widely used in industrial and consumer electronics requiring reliable data shifting operations.

Shift Registers Replacement Considerations

Direct pin-compatible substitutes include the SN74AC164 and CD74ACT164 variants. Verify voltage compatibility as ACT versions typically require a 5V supply only. Check propagation delay specifications if timing margins are critical. Ensure the replacement maintains the same 14-pin SOIC footprint and thermal characteristics.