文章介绍了数字逻辑电路集成芯片的扩展实现原理,介绍了组合逻辑电路译码器和数据选择器的扩展应用,介绍了时序逻辑电路集成计数器的扩展应用。数字系统中常用的各种数字部件就其结构和工作原理而言可分为两大类:组合逻辑电路和时序逻辑电路。逻辑电路的设计就是将实际的,有因果关系的问题用一个较合理、经济、可靠的逻辑电路来实现。 The article introduces the expansion principle of the digital logic integrated circuit chip, introduces the expansion application of the combinational logic circuit decoder and data selector, and introduces the extended application of the integrated counter of the sequential logic circuit. Digital components commonly used in digital systems in terms of its structure and working principle can be divided into two categories: combinational logic and sequential logic circuits. Logic circuit design is the actual, causal relationship problems with a more reasonable, economical and reliable logic circuit to achieve.