DM54165W/883

Shift Registers Overview

The DM54165W/883 is an 8-bit parallel-load or serial-in shift register manufactured by National Semiconductor. It operates on a 5 V supply and features asynchronous parallel loading when the Parallel Load input is LOW. Serial shifting occurs on the rising edge of the clock, with new data entering via the Serial Data input. The device utilizes a 2-input OR clock to combine independent clock sources or act as an active LOW clock enable. It provides complementary outputs from the final stage and is housed in a 14-pin ceramic flatpack (DFP) package suitable for military temperature ranges.

Shift Registers Feature Summary

• Asynchronous parallel load capability allows immediate data entry independent of the clock signal.
• Dual-function clock input supports combined independent clock sources or active low clock enabling.
• Provides both true and complementary outputs from the last stage for flexible logic interfacing.

Shift Registers Applications

• High-speed serial-to-parallel data conversion in military communication systems
• Parallel data acquisition interfaces requiring asynchronous loading
• Shift register stages in digital signal processing chains

Shift Registers Procurement Notes

Verify that the component matches the specific DM54165W/883 part number, as suffixes may indicate different screening levels or packaging variations. Confirm the manufacturer origin, noting that Texas Instruments acquired National Semiconductor. Ensure the ceramic flatpack package integrity is intact and check for MIL-STD-883 compliance documentation if required for your application's reliability standards.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with asynchronous parallel load is required for high-reliability applications. The ceramic flatpack package offers robustness for harsh environments compared to plastic alternatives. Consider the dual-clock input functionality if system timing requires combining multiple clock signals or implementing active-low enable controls within the design architecture.

Shift Registers Part Context

This component belongs to the 54-series logic family, designed for military-grade performance. The 'W' suffix typically denotes a flatpack package, while '/883' indicates compliance with MIL-STD-883 testing standards. As a National Semiconductor product now under Texas Instruments, it represents legacy high-performance logic technology intended for demanding aerospace and defense electronic systems.

Shift Registers Replacement Considerations

Compatible substitutes include the DM54LS165 or DM74LS165 for lower power consumption, though voltage and speed characteristics differ. For direct pin-compatible replacements in military specs, verify equivalent MIL-STD-883 screened parts from current manufacturers holding the original National Semiconductor intellectual property rights.