最低10KHZ,最高400KHZ,你看的250是在转换时间32us下的
CCN是产品型号的尾缀,一般用来表示芯片的等级,封装,性能等等。一般有工业级,商业级,直插,贴片,是否含铅等等说明。看看数据手册就知道了,不同芯片的尾缀定义不同,数据手册会详细说明。
74HC11N74HC125D74HC125N74HC132E74HC138CN74HC138D74HC138E74HC138N74HC151E74HC154D74HC157D74HC164B1R74HC164N74HC17474HC174N74HC193N74HC221N74HC240N74HC241N74HC244DWR74HC244N74HC24574HC273...
74HC11N74HC125D74HC125N74HC132E74HC138CN74HC138D74HC138E74HC138N74HC151E74HC154D74HC157D74HC164B1R74HC164N74HC17474HC174N74HC193N74HC221N74HC240N74HC241N74HC244DWR74HC244N74HC24574HC273...