SNJ54S195FK

Overview

The SNJ54S195FK is a single 4-bit serial/parallel to serial/parallel shift register manufactured by Texas Instruments. It operates within the S series of TTL logic devices and features true outputs. The component supports asynchronous clear and asynchronous parallel load functions, allowing for flexible data manipulation. It is housed in a 20-pin CLLCC package with dimensions of 8.7x7.8 mm. The device is designed for high-temperature environments, with an operating temperature range extending up to 125 °C.

Feature Summary

• Supports both serial and parallel data input and output configurations
• Includes asynchronous clear function for immediate reset capability
• Features asynchronous parallel load for direct data entry

Applications

• Data storage in digital systems
• Serial-to-parallel conversion tasks
• Parallel-to-serial conversion tasks

Procurement Notes

Verify the specific package variant, as the SNJ54S195FK designation may correspond to different physical footprints such as CLLCC or CQCC depending on the manufacturer's revision. Confirm that the required operating temperature range meets the -55 °C to 125 °C specification. Ensure compatibility with standard TTL voltage levels before integration into the circuit design.

Selection Notes

Select this component when a single 4-bit shift register with independent serial and parallel I/O capabilities is required. The S-series technology offers specific speed and power characteristics suitable for military or industrial applications. Consider the 20-pin package size constraints and the need for asynchronous control signals when designing the board layout.

Part Context

This part belongs to the Texas Instruments S series of Schottky TTL logic components. These devices are known for their high-speed operation and are often used in demanding environments. The SNJ54S195FK specifically provides a compact solution for shifting data, distinct from broader universal shift registers like the 54S194 which offer bidirectional capabilities.

Replacement Considerations

Check for exact pin-compatible substitutes within the same S series family. Verify if alternative manufacturers offer equivalent 4-bit shift registers with identical asynchronous control logic and package dimensions.