The application-specific integrated circuit is an integrated circuit customized for the user's specific system according to the user's specific requirements (such as function, performance or technology, etc.).
Asic is divided into two categories: 1. Fully customized integrated circuit according to the specified function and performance requirements, the circuit structure layout and wiring are specially optimized design to achieve the best use of the chip. The integrated circuit made in this way is called a fully customized circuit. 2. The semi-custom integrated circuit is provided by the manufacturer with a certain specification of functional blocks, such as gate arrays, standard units, programmable logic devices, etc., according to user requirements, the use of specially designed software is necessary to connect, so as to design the required ASIC, which is called semi-custom circuit.
At present, semi-custom circuits account for the majority of the ASIC market. Application-specific integrated circuit (ASIC) was developed rapidly in the early 1980s when VLSI process technology tended to be standardized, computer aided design technology was widely used in IC design, and the competition in the electronic complete machine market intensified. The biggest feature of this circuit is that the design and development cycle is short, the function is strong, has shown that it can replace the small and medium-sized integrated circuit strong vitality.