MC74AC257/74ACT257是四路双输入多路复用器，具有3状态输出。通过公共数据选择输入可以从两个源中选择四位数据。四个输出以真实(非反相)形式呈现所选数据。通过在公共输出使能(OE)输入上置逻辑高，可以将输出切换到高阻状态，允许输出直接与总线式系统接口。•通过将输出连接在一起进行多路复用器扩展•非反相3状态输出•输出源/ 漏电流24mA•′ACT257具有TTL兼容输入1516 1413 1211 102134567VCC 98OE I0c I1c Zc I0d I1d Zd SI0a I1a Za I0b I1b Zb GND引脚名称S公共数据选择输入OE 3状态输出使能输入I0a–I0d数据输入来自源0I1a–I1d数据输入来自源1Za–Zd3状态多路复用器输出真值表输出使能选择输入数据输入输出OE S I0I1Z H X X X Z L H X L L L H X H H L L L X L L L H X H H = 高电压等级L = 低电压等级X = 无关紧要Z = 高阻抗������� ���������� QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS N SUFFIX CASE 648-08 PLASTIC D SUFFIX CASE 751B-05 PLASTIC 逻辑符号S OE I0a I1a I0b I1b Zb I0c I1c I0d I1d Za Zc Zd查询MC74AC257供应商MC74AC257 MC74ACT2575-2 FACT DATA功能描述MC74AC257/74ACT257是四路双输入多路复用器，具有3状态输出。它在公共数据选择(S)输入的控制下从两个源中选择四位数据。
The MC74AC258/74ACT258 is a quad 2-input multiplexer with 3-state outputs. It selects four bits of data from two sources under control of a common Select input. The four outputs present the selected data in the complement (inverted) form. The outputs may be switched to a high impedance state with a HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with bus-oriented systems.
The MC100ELT23 is a dual differential PECL to TTL translator. It has 3.5ns typical propagation delay, differential PECL inputs, small outline SOIC package, 24mA TTL outputs and flow through pinouts.
