SN74LVC244APWR 1OE为低电平,2OE为高电平,或者1OE为高电平,2OE为低电平,1Y1与2Y1可以接在一起做线与吗?
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SN74LVC244APWR 1OE为低电平,2OE为高电平,或者1OE为高电平,2OE为低电平,1Y1与2Y1可以接在一起做线与吗?
只要保证1OE和2OE不同时有效,从而导致输出竞争、短路就可以。可以用一个信号接至1OE,同时这个信号经反相器后接至2OE,就可实现你的的目的。我在CPLD中用241实现过这个电路。对了,你用241更好,还省了反相器!241的n1G和2G直接接一起由一个信号控制,正好n1G是低有效,而2G是高有效。perfect!
http://www.ti.com/lit/ds/symlink/sn74hc241.pdf;
http://www.ti.com/lit/ds/symlink/cd74hct241.pdf
FYI !
244在OE为高时Y输出为高阻态,这个高组态是OC或者OD吗?还是两者都不是?