SN54LS244J

The Texas Instruments SN54LS244J is a military-grade octal buffer and line driver with 3-state outputs, fabricated in a hermetic ceramic dual-in-line package (CDIP) as part of the high-reliability 54LS logic family. This device integrates eight non-inverting buffer channels organized into two 4-bit sections, each controlled by independent active-low output-enable pins that force the outputs into a high-impedance state. The low-power Schottky TTL design provides fast propagation delays and robust drive capability, typically sourcing 15 mA and sinking 24 mA, while operating from a nominal 5 V supply over the full military temperature range of −55°C to +125°C. The ceramic package ensures excellent thermal and environmental resilience, making the part suitable for mission-critical systems where consistent performance under shock, vibration, and extreme temperatures is mandatory.

Typical applications include bus interface and signal distribution in avionics computers, radar processing units, missile guidance systems, and satellite communication payloads, where the 3-state outputs allow multiple drivers to share a common data bus without contention. The SN54LS244J is also utilized in ruggedized industrial controllers and secure communication encryptors that demand long-term availability and documented pedigree. Procurement teams should note that the “54” prefix denotes a military temperature range and may be subject to export control regulations such as ITAR or EAR. While the part remains supported by Texas Instruments, legacy military logic families can face extended lead times and sporadic obsolescence risks; sourcing through authorized channels with full traceability is essential to avoid counterfeit devices and to ensure conformity to applicable screening standards such as MIL-STD-883.