AC/DC 225W 开板电源 LOF225-23BxxR2系列数据手册
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00 为四组2 输入端与非门(正逻辑),共有54/7400、54/74H00、54/74S00、54/74LS00四种线路结构形式,其主要电特性的典型值如下:
54/742474 线——七段译码器/驱动器(BCD 输入,OC,15V)简要说明:247 为集电极开路输出的 BCD——七段译码器/驱动器,共有 54/74247 和54/74LS247 两种线路结构型式。其主要电
74ls244芯片资料及功能作用,These buffers/line drivers are designed to improve both theperformance and PC board density of TRI-STATE buffers/drivers employed as memory-address drivers, clock