我使用的是PXA270芯片,从GPIO口输出3.3VTTL电平信号,与之相同通讯的是5VTTL电平信号的模块。想选择一款电平转换芯片,但是引脚都太多(SN74LVC4245),有没有引脚少的芯片,麻烦推荐一下
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