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SN74LVC2T45: 设计

Part Number: SN74LVC2T45
Other Parts Discussed in Thread: SN74LVC4245A

请教一下SN74LVC2T45的功耗大概是多大呢?该芯片是由3.3还是5v供电,能否用主控芯片引脚接在3.3v电源端相当于使能端来使用