Programmable Logic Devices Examples. A logic device is an electronic component which performs a definite function which is decided at the time of manufacture and will never change. History of programmable logic programmable logic arrays 1970 incorporated in vlsi devices can implement any set of sop logic equations outputs can share common product terms programmable logic devices 1980 mmi programmable array logic pal 16l8 combinational logic only 8 outputs with 7 programmable pts of 16 input variables 16r8.
Plcs can range from small modular devices with tens of inputs and outputs i. Programmable logic devices have programmable elements that can be modified and programmed using a special program even after the product left the manufacturing site. Field programmable logic arrays.
For example a not gate always inverts the logic level of the input signal and does can do nothing else.
They consist of only a dozen or so macrocells. Programmable array logic pal pal is a programmable logic device that has programmable and array fixed or array. A programmable logic device is an individual programmable electronic chip which can be used as an element to build digital circuits that can be reconfigured. History of programmable logic programmable logic arrays 1970 incorporated in vlsi devices can implement any set of sop logic equations outputs can share common product terms programmable logic devices 1980 mmi programmable array logic pal 16l8 combinational logic only 8 outputs with 7 programmable pts of 16 input variables 16r8.
