SNJ54LS165AW

Overview

The SNJ54LS165AW is a parallel-load 8-bit shift register manufactured by Texas Instruments. It features eight direct data inputs (A through H) and serial input capabilities, converting parallel data to serial output via the QH pin. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of -55°C to 125°C. It utilizes a ceramic flatpack (CFP) package with 16 pins. Key electrical characteristics include a typical clock frequency of 35 MHz and power dissipation of 90 mW.

Feature Summary

• Provides parallel-to-serial data conversion capability through direct access to individual stages.
• Features gated clock inputs allowing for clock-inhibit functions or alternative clocking sources.
• Includes complementary outputs from the eighth bit stage for versatile signal routing.

Applications

• Parallel-to-serial data conversion in digital systems
• Shift register applications requiring high-temperature operation
• Data acquisition systems utilizing direct overriding load inputs

Procurement Notes

Verify component authenticity against official Texas Instruments documentation due to potential availability variations. Confirm that the specific ordering suffix matches the required military-grade specifications and ceramic packaging requirements. Ensure compliance with all relevant environmental and export control classifications before finalizing procurement decisions.

Selection Notes

Select this component when extended temperature ranges and radiation-hardened ceramic packaging are required. Compare propagation delays and clock frequencies against system timing constraints. Evaluate power dissipation limits relative to available thermal management solutions in the target application environment.

Part Context

This part belongs to the SN54LS165A series of parallel-load 8-bit shift registers. It is designed for military and aerospace applications requiring robust performance under extreme conditions. The device complements other logic families by providing reliable data shifting and storage functionality in harsh environments.

Replacement Considerations

Public confirmed substitute part numbers include SNJ54LS165AJ and SNJ54LS165AFK. Verify pinout compatibility and electrical specifications before substitution.

FAQ

What is the function of the SH/LD input?

The shift/load (SH/LD) input enables direct parallel loading of data into the register when held low, independent of clock signals.

How does the CLK INH input operate?

Holding the clock inhibit (CLK INH) input high inhibits clocking, preventing data shifts regardless of the state of the primary clock input.