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PCA9556PW Datasheet, PDF

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  • Description PCA9556是一款硅CMOS电路,为SMBus应用提供并行输入/输出扩展。PCA9556由8位输入端口寄存器、8位输出端口寄存器和SMBus接口组成。具有低电流消耗和高阻抗开漏输出引脚I/O0。 通过在复位输入上加入低电平,SMBus系统主器件可在超时时使PCA9556复位。通过写入高电平有效的极性反转位,SMBus系统主器件还可反转PCA9556输入。最后,通过写入I/O配置寄存器,系统主器件可将PCA9556的I/O用作输入或输出。 上电复位会将寄存器设为其默认状态并初始化SMBus状态机。RESET引脚可引发相同的复位/初始化而无需使部件断电。 带有复位功能的PCA9557 8位I²C SMBus I/O端口以更高性能引脚对引脚取代PCA9556。
  • Part No. PCA9556PW
  • Manufacturer 恩智浦-NXP

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