SN74LS164NSRE4

Shift Registers Overview

The SN74LS164NSRE4 is an 8-bit serial-in, parallel-out shift register from the Texas Instruments SN74LS164 series. It operates on a bipolar logic family and features two serial data inputs (A and B) that are internally ANDed to control data entry into the eight D-type flip-flops. The device includes an asynchronous clear input for immediate reset of all outputs. It utilizes a 14-pin SOIC surface-mount package and functions within a supply voltage range of 4.75V to 5.25V. The component supports a propagation delay of 32ns and operates at temperatures between 0°C and +70°C.

Shift Registers Feature Summary

• Provides serial-to-parallel conversion using eight D-type flip-flops with push-pull outputs.
• Features dual serial inputs (A and B) that must both be high to advance data on the clock edge.
• Includes an active-low asynchronous clear input to force all Q outputs to a low state immediately.

Shift Registers Applications

• Data acquisition systems requiring serial-to-parallel interface conversion.
• LED display drivers for scanning multiplexed segments.
• General-purpose digital logic circuits needing parallel output expansion.

Shift Registers Procurement Notes

Verify the specific suffix 'E4' indicates lead-free manufacturing compliance as per Texas Instruments documentation. Confirm the package type matches the required PCB footprint, specifically the 14-SOIC dimensions. Ensure the operating temperature range meets the environmental requirements of the target application. Cross-reference the datasheet revision to confirm pinout consistency with existing designs.

Shift Registers Selection Notes

Select this component when a standard TTL-compatible shift register with parallel outputs is required. The LS logic family offers lower power consumption compared to standard 74-series devices while maintaining compatible noise margins. Consider the 14-pin SOIC package for automated surface-mount assembly processes. Verify that the asynchronous clear functionality aligns with the system's reset timing requirements.

Shift Registers Part Context

This part belongs to the widely used 74LS164 family of shift registers manufactured by Texas Instruments. It serves as a fundamental building block in digital electronics for expanding I/O capabilities. The device is designed for compatibility with standard transistor-transistor logic (TTL) systems, ensuring straightforward integration into legacy and modern mixed-signal designs.

Shift Registers Replacement Considerations

The SN74LS164DR is a direct functional equivalent in the same logic family. For surface-mount applications requiring identical specifications, verify pin compatibility before substitution. Alternative packages such as DIP or TSSOP may require adapter solutions if form factor changes are acceptable.