SNJ54LS279AJ

Overview

The SNJ54LS279AJ is a military-grade quadruple S-R latch from the Texas Instruments LS logic family. It features four independent latches with non-inverting outputs, housed in a hermetically sealed 16-pin ceramic dual in-line package (CDIP). The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an extended operating temperature range from -55°C to +125°C.

Feature Summary

• Contains four independent S-R latch circuits for data storage applications
• Features non-inverting outputs providing direct signal representation
• Constructed with hermetically sealed ceramic packaging for environmental protection

Applications

• Military and defense electronic systems requiring high reliability
• Aerospace instrumentation and control units
• Harsh environment data storage modules

Procurement Notes

Verify that the component matches the specific SNJ54LS279AJ part number to ensure it is the military-grade variant rather than the commercial SN74LS279A. Confirm the CDIP-16 package type and check for RoHS exemption status as indicated in official documentation. Ensure the supplier provides traceability for QML certified or military qualified parts if required by your application specifications.

Selection Notes

Select this component when designing systems that require operation across extreme temperatures ranging from -55°C to +125°C. The hermetically sealed ceramic construction makes it suitable for environments where moisture resistance and long-term stability are critical. Consider the LS logic family characteristics regarding power consumption and speed requirements relative to other available logic families.

Part Context

This component belongs to the SN54LS279A series of quadruple S-R latches manufactured by Texas Instruments. The 'SNJ' prefix indicates a military-grade version packaged in a ceramic dual in-line format. It is distinct from the commercial SN74LS279A which typically uses plastic packages and has a narrower operating temperature range.

Replacement Considerations

The SN54LS279AJ serves as a direct functional equivalent to the SNJ54LS279AJ. Both share identical electrical characteristics and pinouts. Verify package compatibility when substituting between these designations.