54L78J/C

Overview

The SN54L78J/C is a high-speed logic integrated circuit manufactured by Rochester Electronics, LLC. It belongs to the SN54L series of TTL components and features a ceramic dual in-line package (CDIP). The device contains two independent 2-input AND-OR-INVERT gates. This component is designed for operation within the military temperature range of -55°C to 125°C. It utilizes standard TTL voltage levels with a nominal supply voltage of 5V. The CDIP packaging provides hermetic sealing suitable for harsh environments.

Feature Summary

• Contains two independent 2-input AND-OR-INVERT gates
• Military-grade temperature range (-55°C to +125°C)
• Hermetically sealed Ceramic Dual In-Line Package (CDIP)
• Operates on standard 5V TTL supply voltage

Applications

• Military aerospace systems requiring radiation-hardened or high-reliability logic
• Spacecraft avionics and guidance control circuits
• Harsh environment industrial equipment operating at extreme temperatures

Procurement Notes

Verify the specific manufacturer lot and date code upon receipt. Confirm that the CDIP package matches the required footprint. Ensure the component meets MIL-PRF-38535 Class K or V specifications if required by the design. Check for lead finish compatibility with soldering processes. Validate electrical parameters against the original datasheet before integration.

Selection Notes

Select this part when dual AND-OR-INVERT functionality is needed in a ruggedized form factor. Compare propagation delay and power dissipation against other SN54L variants like SN54LS78 for speed-power trade-offs. Ensure the system can accommodate the through-hole mounting requirements of the CDIP case. Verify input/output voltage thresholds match the system logic levels.

Part Context

This component is part of the broader SN54 family of high-performance logic devices originally developed for military applications. Rochester Electronics produces these parts using reclaimed wafers or original IP under strict quality controls. The 'L' suffix denotes Low-power Schottky characteristics, while '78' identifies the AND-OR-INVERT function. The '/C' typically indicates a commercial or specific manufacturing batch variant within the military grade line.

Replacement Considerations

Direct pin-compatible replacements include SN54LS78J and SN54H78J, though electrical characteristics such as speed and power consumption will differ. SN54S78J offers higher speed but increased power draw. Verify that any substitute maintains the same package type and temperature rating.