SN74AS194DR

Shift Registers Overview

The SN74AS194DR is a high-speed 4-bit bidirectional universal shift register manufactured by Texas Instruments. It features parallel-in, serial-out, and serial-in capabilities with independent serial input controls for left and right shifting. The device operates with a supply voltage range of 4.5V to 5.5V and includes an asynchronous clear function. It utilizes Schottky diodes to prevent current flow from inputs when voltages exceed the supply or fall below ground, ensuring robust operation in various digital logic environments.

Shift Registers Feature Summary

• High-speed data transfer capabilities suitable for demanding digital applications
• Bidirectional shifting functionality allowing flexible data movement directions
• Asynchronous clear input for immediate reset of all register stages

Shift Registers Applications

• Data storage and manipulation in digital systems
• Parallel-to-serial and serial-to-parallel conversion tasks
• Arithmetic logic unit components for shifting operations

Shift Registers Procurement Notes

Verify the specific suffix 'D' indicates a plastic small-outline package (SOIC) variant. Confirm the manufacturer marking aligns with Texas Instruments standards. Check for RoHS compliance status if required for your assembly process. Ensure the operating temperature range meets your environmental specifications before finalizing procurement.

Shift Registers Selection Notes

Select this component when high-speed shifting is required compared to standard LS series devices. Consider the AS series speed advantages over previous generations. Evaluate pin compatibility with existing PCB layouts designed for standard 16-pin DIP or SOIC packages. Verify power consumption requirements against system thermal constraints.

Shift Registers Part Context

This part belongs to the Texas Instruments 74ASxx series of advanced Schottky logic devices. The series offers improved speed-power product characteristics compared to earlier 74Sxx implementations. It serves as a direct functional replacement for older shift registers while providing faster propagation delays. The DR suffix specifically denotes the surface-mount tape-and-reel packaging format.

Shift Registers Replacement Considerations

Direct replacements include other 74AS194 variants with compatible packaging. Verify pinout compatibility when substituting with different manufacturers' equivalents. Ensure voltage levels remain within the specified 4.5V to 5.5V range for reliable operation across all substitute options.