一、半定做电路的开发史国外半定做电路发展非常迅速,从DTL、TTL、ECL、STL、I~2L、MOS到CMOS门阵列几乎都有系列产品,电路的规模和性能不断提高,应用范围也不断扩大。目前应用领域主要包括数据处理和计算机外围设备、信息处理设备终端、通讯、仪器仪表、自动装置、军事和空间电子设备和消费型电子产品等,今后将进一步扩大到与计算机关系密切的领域,比如使CPU和CPU外围的TTL单片化。半定做电路主要有两种形式:门阵列法(也叫母片法)和标准单元库法。直至目前,90%以上产品采用门阵列形式。门阵列的发展大至可分为三个时期。从六十年代初到七十年代为第一代,第一代门阵列 First, the semi-custom circuit development history Foreign semi-custom circuit development is very rapid, from DTL, TTL, ECL, STL, I ~ 2L, MOS to CMOS gate array Almost all have a series of products, the circuit scale and performance continue to improve, the scope of application Also continue to expand. The current applications include data processing and computer peripherals, information processing equipment terminals, communications, instrumentation, robots, military and space electronics and consumer electronics products, the future will be further expanded to the computer-related areas, such as The CPU and CPU peripheral TTL chip. Semi-custom circuit There are two main forms: gate array method (also known as the mother chip method) and standard cell library method. Up till now, more than 90% of the products adopt the gate array form. Gate array development can be divided into three periods. From the early sixties to the seventies for the first generation, the first generation of gate array