SNJ54LS240J

Overview

The SNJ54LS240J is a ceramic dual in-line package (CDIP-20) octal bus driver from the LS TTL series. It features two independent four-bit buffers with inverted outputs and three-state capability. The device operates within a voltage range of 4.5V to 5.5V and supports an extended military temperature range from -55°C to 125°C. Key electrical parameters include a maximum propagation delay of 30ns, input current of 20µA, and output drive capabilities of -8mA high and 8mA low at 5V.

Feature Summary

• Provides octal buffering with inverted logic levels for signal conditioning
• Features three-state outputs to isolate the bus when disabled
• Constructed in hermetically sealed ceramic packaging for environmental protection

Applications

• Military aerospace computing systems requiring radiation tolerance
• High-reliability telecommunications equipment
• Industrial control buses operating in extreme temperatures

Procurement Notes

Verify the CDIP-20 ceramic package authenticity and lead inspection for pin integrity. Confirm the LS logic family designation matches system requirements. Ensure the military temperature rating aligns with operational environments. Check for specific manufacturer lot traceability documentation required by procurement standards.

Selection Notes

Select this component when inverted octal buffering with three-state isolation is required in harsh environments. The ceramic package offers superior durability compared to plastic variants. Verify that the LS speed and power consumption fit the system constraints relative to faster or lower-power alternatives.

Part Context

This part belongs to the Texas Instruments 54LSxx series of standard logic devices designed for military specifications. It serves as a buffer interface between data buses and peripheral components. The SNJ prefix indicates a specific ceramic package variant manufactured under quality assurance protocols.

Replacement Considerations

SN54LS240J: Plastic DIP equivalent with similar electrical characteristics but different packaging material.