我设计一个板使用PIC32 MX27 0F256D设备。我需要使用TQFP封装，但是Microchip提供了两种设备：PIC32 MX27 0F256D I/PTPIC32 MX27 0F256D 50I/P
ti，知道“PT”后缀指的是TQFP包，但“i”和“50i”是什么意思？很抱歉这么简单的问题，但答案不容易在Microchip的文档中找到。
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I am designing a board to use a PIC32MX270F256D device. I need to use a TQFP package, but Microchip offers two devices:
PIC32MX270F256D-I/PT
PIC32MX270F256D-50I/PT
I know that the "PT" suffix refers to the TQFP package, but what do the "I" and "50I" mean?
Sorry for such a simple question, but the answer is not easily found in Microchip's documentation.
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