SNJ54S240W

Overview

The SNJ54S240W is a military-grade octal buffer and line driver manufactured by Texas Instruments. It features bipolar logic with eight inverting channels and three-state outputs. The device operates within a supply voltage range of 4.5 V to 5.5 V. It provides high drive capabilities with an output current of -12 mA for high states and 48 mA for low states. The component is housed in a 20-lead ceramic flatpack (CFP) package and supports through-hole mounting. It is rated for operation across an extended temperature range from -55°C to +125°C, ensuring reliability in harsh environments.

Feature Summary

• Military-grade construction designed for extreme environmental conditions
• Octal configuration providing eight independent inverting channels
• Three-state outputs allowing bus-oriented memory and communication systems
• High-current drive capability suitable for driving heavy loads

Applications

• Bus-oriented memory systems requiring high-speed data transfer
• Communication systems utilizing bidirectional data lines
• Control logic circuits in aerospace or defense equipment
• Industrial control systems operating in high-temperature environments

Procurement Notes

Verify the specific suffix 'W' indicates the ceramic flatpack package variant when sourcing. Confirm that the component meets all military specifications required for your application, as commercial equivalents may lack the necessary ruggedness. Check for availability constraints, as military-grade parts often have limited production runs. Ensure compatibility with existing PCB footprints for 20-lead CFP packages during integration.

Selection Notes

Select this component when high noise immunity and drive strength are critical for signal integrity in noisy environments. The bipolar technology offers faster switching speeds compared to standard TTL variants. Consider the thermal management requirements associated with the extended temperature range. Verify that the inverting logic function aligns with the system design, as non-inverting alternatives like the SN54S244 exist.

Part Context

This part belongs to the SN54S series of bipolar logic devices, which are known for their speed and robustness. The SN54 family is distinguished from the SN74 series by its wider operating temperature range and stricter manufacturing tolerances. It serves as a key component in legacy military and industrial designs where reliability under stress is paramount. The device complements other octal drivers in the same family for complex bus architectures.

Replacement Considerations

SN54S240J: Identical electrical performance but in a 20-CDIP ceramic package. SN54S240N: Plastic DIP package variant with similar electrical characteristics. SN54LS240: Low-power Schottky version with slower speed but lower power consumption.