CMOS门电路有带缓冲器输出和不带缓冲器输出两种类型,前者称B型门电路,后者称uB型门电路。表1列出了部份B型和uB型门电路。同一型号的B型和uB型门电路逻辑功能和管脚排列相同,但电气特性不同,在使用中不一定有互换性。这个问题常常被使用者忽略,并且由于混用二种电路而产生了许多问题。 CMOS gate with a buffer output and without buffer output of two types, the former said B-type gate circuit, which said uB-type gate circuit. Table 1 lists some of the Type B and Type uB gate circuits. The same type of B-type and uB-type gate circuit logic and pin arrangement of the same function, but the electrical characteristics of different, are not necessarily interchangeable in use. This problem is often overlooked by the user and creates a number of problems due to mixing of the two circuits.