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SN74LVC2G74: SN74LVC2G74

Part Number: SN74LVC2G74

您好,使用 SN74LVC2G74该触发器的时候,VCC和PER均5V供电,CLR和CLK均为比较器输出的3V3,这时候发现整个电路中3V3升至4V,5V电压稍微下降,请问是否是芯片内部5V和3V3有连接,导致有电流流动?

  • 您好,

         SN74LVC2G74的输入管脚的逻辑电平需满足下面的电平要求.

          如果是5V供电,高电平需输入电压大于3.5V,低电平不超过1.5V。

         如您用3.3V信号,无法满足芯片正常工作要求。