SNJ54178J

Shift Registers Overview

The SNJ54178J is a military-grade hex buffer integrated circuit manufactured by Texas Instruments. It belongs to the TTL/H/L series and features six independent non-inverting gates. The device utilizes an open-collector output configuration, requiring external pull-up resistors for logical operation. It is housed in a CDFP-14 ceramic flatpack package designed for high reliability. Key electrical parameters include a maximum propagation delay of 30 ns, a load capacitance of 15 pF, and a maximum supply current of 41 mA. The unit operates within a wide temperature range from -55 °C to 125 °C with a supply voltage between 4.5 V and 5.5 V.

Shift Registers Feature Summary

• Contains six independent non-inverting buffer gates
• Features open-collector outputs requiring external pull-up resistors
• Military-grade construction with ceramic flatpack packaging
• Wide operating temperature range suitable for harsh environments

Shift Registers Applications

• High-reliability digital logic buffering
• Military aerospace signal processing
• Industrial control systems requiring open-collector interfaces

Shift Registers Procurement Notes

Verify the specific suffix 'J' against official Texas Instruments documentation to confirm the exact package variant and qualification status. Ensure compatibility with existing pull-up resistor networks due to the open-collector architecture. Confirm that the ceramic flatpack form factor fits the target PCB footprint and thermal requirements. Validate that the supply voltage and current specifications align with the system power budget.

Shift Registers Selection Notes

Select this component when military-grade reliability and wide temperature tolerance are required. The open-collector outputs allow for wired-AND configurations and level shifting. Consider the physical size of the ceramic flatpack package during layout. Verify that the propagation delay meets the timing constraints of the application. Ensure external pull-up components are specified correctly for the desired logic levels.

Shift Registers Part Context

The SNJ54178J is part of the broader SN5417 family of hex buffers. It shares functional similarities with other TTL/H/L series devices but is distinguished by its military qualification and specific packaging. This component serves as a fundamental building block for digital circuits requiring robust signal buffering in demanding environments.

Shift Registers FAQ

Why are external pull-up resistors required?

The SNJ54178J uses open-collector outputs, which cannot actively drive the output high. External resistors are necessary to pull the output voltage to the supply rail for proper logical operation.

What is the significance of the 'J' suffix?

The 'J' suffix typically denotes a specific package type or qualification level, such as a ceramic flatpack variant, as defined in the manufacturer's ordering information.