 The 68EC040 was used in Cisco switch Supervisor Engine I that is the heart of models 2900, 2948G, 2980G, 4000, 4500, 5000, 5500, 6000, 6500 and 7600.The "68LC040" is a "low cost" version of the Motorola 68040 microprocessor with no FPU.This makes it less expensive and it draws less power.