54F194DM-MLS

Overview

The 54F194DM-MLS is a bidirectional 4-bit universal shift register from the F/FAST series, manufactured by National Semiconductor. It features parallel-in and parallel-out capabilities with push-pull outputs. The device operates on a single voltage supply ranging from 4.5V to 5.5V. It is housed in a 16-pin CDIP package and supports an operating temperature range of -55°C to 125°C.

Feature Summary

• Bidirectional shifting capability for data movement in both directions
• Parallel input and output configuration for simultaneous data access
• Push-pull output structure providing robust signal drive

Applications

• Data storage and transfer in digital systems
• Serial-to-parallel and parallel-to-serial conversion
• Digital signal processing applications requiring bidirectional data flow

Procurement Notes

Verify the manufacturer origin, as National Semiconductor assets are managed by Texas Instruments or Rochester Electronics. Confirm the specific suffix 'MLS' corresponds to the required ceramic DIP packaging and military-grade temperature rating. Ensure compatibility with existing 5V logic levels and check for RoHS compliance status if required by current regulations.

Selection Notes

Select this component when a 4-bit bidirectional shift register with parallel I/O is required. The F/FAST series offers high-speed performance suitable for demanding digital applications. The wide temperature range makes it appropriate for industrial or aerospace environments where standard commercial parts may fail.

Part Context

This part belongs to the 54F194 family of universal shift registers. The '54' prefix typically denotes military-grade specifications, while 'F' indicates the Fast TTL logic family. The 'DM' suggests a dual in-line package, and 'MLS' specifies the material and thermal characteristics.

Replacement Considerations

Check for equivalents such as SN74S194 or other 54F194 variants from Texas Instruments. Verify pinout compatibility and electrical characteristics before substitution. Ensure the replacement maintains the bidirectional functionality and parallel I/O requirements.