The SP486 and SP487 are low–power quad differential line drivers meeting RS-485 and RS-422 standards. The SP486 features a common driver enable control the SP487 provides independent driver enable controls for each pair of drivers. Both feature t

介绍软件驱动开发中经常使用的几个电路概念，比如三态门，高阻-Describes the software-driven development often use the concept of a few circuits, such as the tri-state gate, high resistance, etc.

KX022 三軸偵測器 , 親自測試可用 , 最簡單的三軸加速器-KX022 is very good tri-state part . I like it .