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SN是TI逻辑产品的标准前缀,ACT指的是Advanced CMOS Technology。
这两款功能完全相同,主要区别在于传输延迟tpd参数有差异。
SN74ACT244:5V时tpd(max)为9.5ns。
SN74ACT241:5V时tpd(max)为8.5ns。
是的,从官网的价格来看,ACT244的要高,二者虽然都是ACT的工艺,但在ACT244的datasheet有描述SNx4ACT244是兼容MIL-PRF-38535标准,另外,datasheet中也有描述:All Parameters are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.因此我想这是244要比241价格高的原因。