The Old Days

Mil-Std-1553 was released in August 1973, and was first used in the F-16 fighter plane. Back then, a full 1553 Bus Controller (BC) + Remote Terminal (RT) design spread across 3 cards filled up with military grade TTL family components (54LSXX). The design was usually based on micro code for control and state-of-the-art logic for designing the 1553 decoder. In the '80s, ICs (integrated Circuits) for 1553 decoder encoder emerged, and 1553 was reduced to a single card with less TTL devices and higher complexity ICs dedicated to specific functions.